Mexico
Guides
Megetra cancellata
Megetra cancellata is a blister beetle (family Meloidae) and one of three recognized species in the North American genus Megetra. It is considered the most anatomically and ecologically distinctive species in the genus. The species exhibits a discontinuous distribution across the southwestern United States and Mexico, occurring in limited sympatry with its congeners M. vittata and M. punctata. Two subspecies are recognized: M. c. cancellata and M. c. hoegei.
Megischus arizonicus
Arizona Crown Wasp
Megischus arizonicus is a species of crown wasp in the family Stephanidae, first described by Townes. Originally known only from Arizona, USA, the species has since been documented in central Mexico, expanding its known range significantly. Like other stephanids, it is a parasitoid wasp associated with wood-boring beetle larvae. The species exhibits the characteristic elongated, crown-like structure on the head that gives the family its common name. Records remain sparse, with only a handful of observations documented in biodiversity databases.
Meigenielloides
Meigenielloides is a genus of tachinid flies established by Townsend in 1919. It contains a single known species, Meigenielloides cinerea, described from Mexico. As a member of the tribe Blondeliini within the subfamily Exoristinae, it belongs to a group of parasitoid flies that attack other insects.
Melacoryphus admirabilis
Admirable Seed Bug
Melacoryphus admirabilis is a seed bug in the family Lygaeidae, native to the Nearctic region of North America. The species is closely related to other soapberry bugs and shares ecological associations with plants in the family Sapindaceae. It occurs in the southwestern United States and Mexico, typically in warm, arid habitats. Like other members of its genus, it feeds on seeds and plant fluids. The species is occasionally encountered in large aggregations.
Melanis
Melanis is a genus of butterflies in the family Riodinidae, restricted to the Neotropical realm. The genus was established by Hübner in 1819 and contains approximately 30 described species distributed across Central and South America, with highest diversity in Brazil. Species within this genus exhibit variation in wing patterns and are typically found in tropical and subtropical forest habitats.
Meristopsis melanosteptos
Meristopsis melanosteptos is a species of planthopper in the family Delphacidae, described from specimens collected in Florida and Oaxaca, Mexico. The species belongs to a genus of small delphacid planthoppers characterized by reduced wing venation and distinctive male genitalia. It was formally described in 2012 as part of a taxonomic revision of New World delphacine genera. Like other members of Delphacidae, it is presumed to feed on monocotyledonous plants, though specific host associations remain undocumented.
Mesamia divisa
Mesamia divisa is a species of leafhopper in the family Cicadellidae, described by DeLong and Hershberger in 1947. It belongs to the subfamily Deltocephalinae and tribe Platymetopiini. The species is known from multiple states in central and northern Mexico. Like other members of its family, it is presumed to feed on plant sap using piercing-sucking mouthparts.
Mesoplia dugesi
Mesoplia dugesi is a species of bee in the family Apidae, tribe Ericrocidini. It was described by Cockerell in 1917. The species has a restricted distribution in the southwestern United States and Mexico, with confirmed records from Arizona and adjacent Mexican states. As a member of the cleptoparasitic tribe Ericrocidini, it is presumed to exhibit nest parasitism behavior targeting other bee species, though specific host associations remain undocumented.
Mestobregma terricolor
Dirt-colored Grasshopper
Mestobregma terricolor, commonly known as the dirt-colored grasshopper, is a band-winged grasshopper in the family Acrididae. The species was described by Rehn in 1919 and is native to North America, with records from Texas and northeastern Mexico. It belongs to the subfamily Oedipodinae, a group characterized by banded hindwings. Information on its biology and ecology remains limited.
Metacyrba taeniola similis
Metacyrba taeniola similis is a subspecies of jumping spider in the family Salticidae, distributed across the southern United States and Mexico. As a member of the Metacyrba genus, it belongs to a group of cursorial salticids adapted to open habitats. The subspecies was described by Nathan Banks in 1904.
Metacyrba taeniola taeniola
Metacyrba taeniola taeniola is a subspecies of jumping spider (Salticidae) found in the southern United States and Mexico. As a member of the genus Metacyrba, it exhibits the characteristic jumping ability and acute vision typical of salticids. The subspecies designation indicates geographic variation within the broader species M. taeniola. It is moderately documented with 171 iNaturalist observations, suggesting it is encountered with some regularity by naturalists.
Metamasius callizona
Mexican bromeliad weevil
Metamasius callizona is an invasive weevil native to southern Mexico, Guatemala, and Panama that was first documented in Florida in 1989. Adult females chew slits in bromeliad leaves near feeding sites and deposit single eggs within these wounds. Larvae mine meristematic tissue and flower stalks, typically killing host plants, while adult leaf feeding is generally non-fatal. Florida populations have grown dramatically larger than native-range densities and now threaten multiple native and endangered bromeliad species.
invasive-speciespestbiological-controlbromeliad-specialistFloridaMexicoGuatemalaPanamaTillandsiaAnanasLixadmontia-frankiholometabolousmultivoltineepiphyteconservation-concernendangered-species-threatgardening-industry-vectorparasitoid-introductionBeauveria-bassiana-(native-range-pathogen-not-present-in-Florida)Metaphidippus chera
Metaphidippus chera is a species of jumping spider in the family Salticidae. It was first described by Chamberlin in 1924. The species is known to occur in the United States and Mexico. Like other jumping spiders, it possesses excellent vision and hunting behavior characteristic of the family.
Metepeira arizonica
Arizona Labyrinth Orb-Weaver
Metepeira arizonica is an orb-weaving spider in the family Araneidae, commonly known as the Arizona Labyrinth Orb-Weaver. It is one of approximately thirteen Metepeira species recognized in North America north of Mexico. Like other members of its genus, it constructs a distinctive web architecture combining a small orb web with a tangled, cobweb-like snare surrounding a tubular retreat. The species occurs in arid and semi-arid habitats of the southwestern United States and Mexico.
Metepeira spinipes
Metepeira spinipes is a colonial orb-weaving spider in the family Araneidae, ranging from southern Oregon through Mexico. Unlike typical solitary orb weavers, this species exhibits flexible social behavior, forming colonies that vary from solitary individuals to aggregations of several hundred spiders with interconnected webs. Mature females measure 5.5–7.2 mm in body length, while males are smaller at 3–4.5 mm. The species shows pronounced seasonal colony dynamics, with foundation in spring, peak size in late summer, and decline in fall.
Methia
Methia is a genus of longhorned beetles in the family Cerambycidae, subfamily Cerambycinae, and tribe Methiini. The genus was established by Newman in 1842 and contains approximately 40 described species distributed primarily in North and Central America, with some species extending into South America. Species within this genus are typically small to medium-sized cerambycids. Adult Methia have been documented as attracted to ultraviolet and mercury vapor lights, suggesting nocturnal or crepuscular activity patterns.
Methia brevis
Methia brevis is a species of longhorn beetle in the family Cerambycidae, first described by Henry Clinton Fall in 1929. The species belongs to the tribe Methiini and is one of approximately 30 described species in the genus Methia. Very little published information exists regarding its biology, ecology, or distinguishing characteristics beyond its taxonomic placement. The species has been recorded in both the United States and Mexico.
Metopleura potosi
Metopleura potosi is a moth species in the family Gelechiidae, first described by Busck in 1912. It is the sole member of the monotypic genus Metopleura. The species is known from San Luis Potosí, Mexico, and has been documented in 29 iNaturalist observations. No detailed biological information has been published regarding its life history, host associations, or ecological role.
Mexalictus
Mexican sweat bees
Mexalictus is a genus of sweat bees established by Eickwort in 1978. The genus comprises more than 20 described species distributed in the Halictidae family. Members of this genus are small to medium-sized bees characterized by metallic coloration typical of many halictids. The genus is native to Mexico and adjacent regions.
Micaria gosiuta
Micaria gosiuta is a ground spider in the family Gnaphosidae, described by Gertsch in 1942. It belongs to the genus Micaria, which comprises small, fast-moving spiders often characterized by metallic coloration and ant-mimicking appearance. The species is recorded from the southwestern United States and Mexico.
Micraneflus imbellis
Micraneflus imbellis is a species of longhorn beetle in the family Cerambycidae, tribe Elaphidiini. Originally described as Aneflomorpha imbellis by Casey in 1914, it was later transferred to the genus Micraneflus. The genus Micraneflus is a small group within the diverse cerambycid fauna of North and Middle America. Very little specific biological information has been published for this species.
Micrixys
Micrixys is a genus of ground beetles in the family Carabidae, subfamily Panagaeinae. The genus was described by LeConte in 1854 and contains at least two recognized species: Micrixys distincta from the United States and Micrixys mexicana from Mexico. These beetles belong to the tribe Panagaeini and are part of the diverse North American carabid fauna.
Microcentrus
Microcentrus is a genus of treehoppers in the family Membracidae, containing approximately 10 described species. The genus belongs to the tribe Microcentrini within the subfamily Stegaspidinae. Species in this genus are found in North America and Mexico, including the hickory stegaspidine treehopper (M. caryae). The genus was established by Stål in 1870.
Microschatia championi
Microschatia championi is a species of darkling beetle in the family Tenebrionidae, described by Horn in 1893. The genus Microschatia belongs to a diverse family of primarily nocturnal beetles commonly found in arid and semi-arid environments. This species is known from Mexico based on distribution records.
Microschatia morata
Microschatia morata is a species of darkling beetle in the family Tenebrionidae, first described by Horn in 1878. It belongs to a genus of small to medium-sized beetles distributed in North America. The species has been documented in Mexico based on collection records.
Microterys
Microterys is a large genus of parasitoid wasps in the family Encyrtidae (Chalcidoidea), with its center of distribution in the northern parts of the Northern Hemisphere. Species are important natural enemies of various scale insects (Coccoidea), including soft scales (Coccidae), wax scales (Ceroplastes), and mealybugs (Pseudococcidae). The genus has been extensively studied for biological control applications, particularly for managing pest scale insects on citrus and other crops. Several species have been introduced to new regions as biocontrol agents, including Microterys flavus in California.
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syllepsicus
Mimetus syllepsicus is a species of pirate spider in the family Mimetidae, first described by Hentz in 1832. Like other members of its genus, it is an araneophagic predator that specializes in hunting other spiders rather than building webs to catch prey. The species occurs in North and Middle America, with records from the United States and Mexico. As a mimetid, it exhibits the characteristic predatory behavior of infiltrating the webs of other spiders to ambush and consume them.
Ministrymon clytie
Clytie hairstreak, Clytie Ministreak
Ministrymon clytie, commonly known as the Clytie hairstreak or Clytie Ministreak, is a small butterfly in the family Lycaenidae. First described by William Henry Edwards in 1877, this species ranges from the southwestern United States through Mexico to Central America. It inhabits tropical forest openings and subtropical thorn forests. The larvae feed on Pithecellobium species.
Mistharnophantia sima
Mistharnophantia sima is a planthopper species in the family Flatidae, first described by Doering and Shepherd in 1947. It belongs to the tribe Selizini within the subfamily Flatinae. The species has been recorded from the southwestern United States and northern Mexico. As a member of the Flatidae, it shares the family's characteristic broad, often flattened body form and cryptic coloration typical of many planthoppers.
Misumenoides quetzaltocatl
Misumenoides quetzaltocatl is a species of crab spider in the family Thomisidae, described by Jiménez in 1992. The genus Misumenoides comprises flower crab spiders that ambush prey on vegetation. As a Neotropical species known from Mexico, it shares the characteristic crab-like body form and anteriorly directed legs typical of the family. Like congeners, it likely exhibits the sit-and-wait predatory strategy on flowers and foliage.
Mitostylus setosus
Mitostylus setosus is a species of broad-nosed weevil in the family Curculionidae, first described by Sharp in 1911. It belongs to the tribe Sciaphilini within the subfamily Entiminae. The species has been recorded from multiple locations across southwestern North America, including Arizona, California, and several Mexican states. As a member of this genus, it likely shares the general characteristics of other Mitostylus species, though specific biological details remain poorly documented in the available literature.
Monoleuca erectifascia
Monoleuca erectifascia is a moth species described by Harrison G. Dyar in 1925. It is currently treated as a synonym of Monoleuca sulphurea, a species in the family Limacodidae (slug caterpillar moths). The original description was based on specimens from Mexico. As a synonym, this name has no independent taxonomic standing and does not represent a separately recognized biological entity.
Morpheis clenchi
Morpheis clenchi is a moth in the family Cossidae (carpenter moths or goat moths), described by Donahue in 1980. The species is known from limited records in Arizona and northern Mexico. Adults have been documented in July. The specific epithet honors entomologist Harry K. Clench.
Mozena arizonensis
Mozena arizonensis is a leaf-footed bug in the family Coreidae, described by Ruckes in 1955. The species is distributed across the southwestern United States and Mexico, with records from Arizona and Central America. It has been documented on Vachellia constricta (white-thorn acacia) in southeastern Arizona.
Mycotrogus mentalis
Mycotrogus mentalis is a darkling beetle species in the family Tenebrionidae, described by Blaisdell in 1923. The genus Mycotrogus is a small group within this large family of primarily detritivorous beetles. This species is known from Mexico, though detailed biological information remains limited in available literature. Like other tenebrionids, it likely occupies arid or semi-arid environments.
Mydas xanthopterus
Mydas xanthopterus is a species of mydas fly in the family Mydidae. It occurs in North America, specifically in Mexico and the United States. The species is notable for its resemblance to red-winged Pepsis spider wasps, suggesting possible Batesian mimicry. It occurs in sympatry with Pepsis grossa, a large spider wasp species.
Myrmecocystus mendax
honey ant, honeypot ant
Myrmecocystus mendax is a species of honeypot ant native to Mexico and the Southwestern United States. The species exhibits notable intraspecific variation in social organization: populations in the Sierra Ancha Mountains of central Arizona display primary polygyny with cooperative colony founding by multiple unrelated queens, while Chiricahua Mountains populations are predominantly monogynous with single-queen founding. Mature colonies in polygynous populations contain an average of 6.27 queens. The species produces specialized replete workers that serve as living food storage vessels.
Myrmedonota
Myrmedonota is a genus of rove beetles (Staphylinidae: Aleocharinae) first described by Cameron in 1920. The genus was first recorded from Mexico in 2013 with the description of two new species, M. shimmerale and M. xipe. Members of this genus exhibit myrmecophilous associations, aggregating toward agitated ants and potentially preying on them. The genus is suggested to be more diverse in the New World than previously recognized, though its taxonomy remains in a state of confusion.
Naphrys
North American Euophrys jumping spiders
A genus of small jumping spiders in the family Salticidae, tribe Euophryini. First described by G.B. Edwards in 2003, the name is a portmanteau of 'North America' and 'Euophrys'. Species are compact-bodied, typically under 5 mm in length, with cryptic brown or gray coloration. Originally considered restricted to the Nearctic region, but subsequent research has demonstrated distribution extending into the Neotropical region. The genus currently includes seven described species, with four originally described from the United States, Canada, and Mexico, and three additional species described from Mexico in 2024.
Naphrys acerba
Naphrys acerba is a jumping spider species in the family Salticidae, distributed across the United States and Mexico. It was first described by the Peckhams in 1909 and represents one of the more southerly distributed members of the genus Naphrys. The species has been documented with precise locality records in northeastern Mexican states including Nuevo León and Tamaulipas, extending the known range of the genus beyond the Nearctic region.
Narberdia
Narberdia is a genus of true weevils in the family Curculionidae, tribe Anthonomini. The genus was monotypic when described by Burke in 1976 from the United States, but expanded to at least five species following descriptions of four additional species from México and Costa Rica in 2017. All species are intimately associated with plants of the genus Bernardia (Euphorbiaceae). Sexual dimorphism is pronounced, with females possessing a longer, more slender rostrum and a distinctive tibial tooth absent in males.
Narnia
Narnia is a genus of leaf-footed bugs in the family Coreidae, containing approximately seven described species. The genus was established by Carl Stål in 1862. Species in this genus are found in southwestern North America and Mexico, where they are associated with cacti and other desert vegetation. The genus name predates and is unrelated to C.S. Lewis's fictional world.
Narnia inornata
cactus bug
Narnia inornata is a leaf-footed bug (family Coreidae) distributed across the southwestern United States and Mexico. It is strongly associated with cactus habitats, where it feeds on fruit and stem joints of prickly pear (Opuntia) and cholla (Cylindropuntia). The species is relatively small and quick-moving, making it difficult to photograph in the field. It is one of several Narnia species specialized for life in arid, cactus-dominated ecosystems.
Neaneflus fuchsii
Neaneflus fuchsii is a species of longhorn beetle (family Cerambycidae) described by Wickham in 1905. It belongs to the subfamily Cerambycinae and tribe Elaphidiini. The species is distributed in North America and Middle America, with records from Mexico and the United States.
Nemomydas brachyrhynchus
Nemomydas brachyrhynchus is a species of mydas fly in the family Mydidae, a group of large, robust flies known for their striking appearance and relatively uncommon occurrence. The species was described by Osten Sacken in 1886 and was originally placed in the genus Leptomidas. It is known from Mexico, though specific details about its biology remain poorly documented. Like other mydas flies, it likely has a complex life cycle involving soil-dwelling larval stages.
Nemotarsus rhombifer
Nemotarsus rhombifer is a species of ground beetle in the family Carabidae, first described by Henry Walter Bates in 1883. It belongs to the subfamily Lebiinae and tribe Cyclosomini. The species has been recorded from Guatemala, Mexico, and the United States, spanning parts of Central and North America.
Neobarrettia
arid-land katydid, spiny predatory katydid
Neobarrettia is a genus of nine North American predatory katydids distinguished by prominent spines and powerful mandibles adapted for carnivory. These insects inhabit arid and semi-arid regions from the southwestern United States through Mexico. They are known for aggressive threat displays and the ability to inflict painful bites when handled.
Neobarrettia spinosa
Greater Arid-land Katydid, Red-eyed Katydid, Red-eyed Devil, Giant Texas Katydid, Spiny Bush Katydid
Neobarrettia spinosa is a large, predatory katydid native to the southwestern United States and northern Mexico. Unlike most katydids, it is an obligate carnivore, actively hunting and consuming prey including other insects, small vertebrates, and even endangered songbirds. The species is notable for its striking threat display, during which it rears back, spreads its wings, and exposes its bright coloration while presenting formidable mandibles and spiny forelegs. It is one of only two Neobarrettia species extending into the United States from a genus otherwise restricted to northern Mexico.
Neochodaeus repandus
Neochodaeus repandus is a species of sand-loving scarab beetle in the family Ochodaeidae, first described by Fall in 1909. The species is restricted to sandy habitats in the southwestern United States and northern Mexico. It belongs to a genus and family of beetles specialized for life in loose, sandy substrates.
Neoclytus augusti
Neoclytus augusti is a species of longhorned beetle in the family Cerambycidae, described by Chevrolat in 1835. It belongs to the tribe Clytini, a group known for wasp-mimicking species with rapid, jerky movements. The species occurs in Middle America and North America, including Guatemala and Mexico. Specific details about its biology, host plants, and life history remain poorly documented in available literature.