Ontario
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Aeolus amabilis
Aeolus amabilis is a species of click beetle in the family Elateridae, described by LeConte in 1853. It belongs to a genus characterized by small to medium-sized beetles with the typical elaterid body plan. The species has been recorded in Ontario, Canada, though detailed biological information remains limited in available sources.
Agonum canadense
Agonum canadense is a ground beetle species in the subfamily Platyninae, first described by Goulet in 1969. The species has a restricted distribution in eastern North America, with confirmed records from Ontario, Canada and Pennsylvania, United States. As a member of the large genus Agonum, it shares the general characteristics of small to medium-sized ground beetles with elongated bodies and thread-like antennae.
Agrilus celti
Agrilus celti is a metallic wood-boring beetle in the family Buprestidae. The species was described by Knull in 1920. It is found in North America. The specific epithet 'celti' suggests an association with Celtis (hackberry), a genus of trees commonly used as hosts by related Agrilus species, though direct host records for this species are not documented in the provided sources.
Agrilus obsoletoguttatus
Beech Borer
Agrilus obsoletoguttatus is a small metallic wood-boring beetle in the family Buprestidae, native to North America. It is among the smallest jewel beetle species utilized as prey by the specialist predatory wasp Cerceris fumipennis, which provisions its underground nests with paralyzed buprestid beetles. The species has been documented in nest caches containing up to 13 individuals, reflecting its small size relative to larger buprestid prey.
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arcanus
Arcane Click Beetle
Agriotes arcanus is a species of click beetle in the family Elateridae, first described by W.J. Brown in 1933. The species belongs to a genus containing numerous economically significant agricultural pests, though specific information about this particular species remains limited. It is known from Ontario, Canada, based on available distribution records. Like other members of Elateridae, adults possess the characteristic clicking mechanism that allows them to right themselves when flipped onto their backs.
Agriotes isabellinus
Isabelline Click Beetle
Agriotes isabellinus is a click beetle (family Elateridae) known as the Isabelline Click Beetle. It is native to eastern Canada, with records from Ontario and Québec. As a member of the genus Agriotes, its larvae are likely wireworms, though specific life history details for this species remain poorly documented. The species has been detected through environmental DNA methods in studies targeting invasive pest detection.
Altica pedipallida
Altica pedipallida is a flea beetle in the tribe Alticini described by LeSage in 2008. The species is known from eastern Canada (Ontario and Québec) and has been documented with a larval host association with Oenothera pilosella (Onagraceae), representing the first recorded host plant for this species. Like other members of the genus Altica, adults likely feed on foliage of host plants.
Ammodonus fossor
Ammodonus fossor is a species of darkling beetle (family Tenebrionidae) described by LeConte in 1847. The species epithet "fossor" (Latin for "digger") suggests fossorial (burrowing) habits, though specific behavioral documentation is limited. It is recorded from Ontario, Canada, with relatively few observations available. As a member of Tenebrionidae, it belongs to a large and diverse family of beetles primarily associated with arid and semi-arid environments, though many species occupy varied habitats.
Ampedus fuscatus
Ampedus fuscatus is a click beetle in the family Elateridae, described from North America by Melsheimer in 1845. Like other members of the genus Ampedus, it possesses the characteristic prosternal process that produces the clicking mechanism for which the family is named. The species has been documented in Ontario, Canada, with limited observational records available.
Ancistrocerus adiabatus
Bramble Mason Wasp
Ancistrocerus adiabatus is a small potter wasp in the subfamily Eumeninae, commonly known as the Bramble Mason Wasp. Adults reach approximately 11 mm in length. This species is notable as the first documented case of large-scale migration in eumenine wasps, with 44,000–68,000 individuals observed moving through a migration corridor in southwestern Ontario in less than an hour. It is multivoltine, producing multiple generations per year.
Aristotelia primipilana
Aristotelia primipilana is a small gelechiid moth described by Edward Meyrick in 1923. It belongs to the twirler moth family Gelechiidae, a diverse group of microlepidoptera whose larvae typically feed on specific host plants. The species has been documented in eastern North America with records from Florida and Ontario. Like other members of its genus, it exhibits the bold patterning characteristic of Aristotelia species.
Aulacidea harringtoni
Aulacidea harringtoni is a species of gall wasp in the family Cynipidae, first described by Ashmead in 1887. The genus Aulacidea comprises gall-forming wasps that induce galls on host plants. Distribution records indicate presence in North America, specifically in Canada including Ontario.
Blapstinus moestus
Blapstinus moestus is a species of darkling beetle in the family Tenebrionidae, first described by Melsheimer in 1846. It belongs to a genus of small to medium-sized beetles commonly found in North American habitats. The species is documented from Ontario, Canada, though detailed biological information remains limited in published sources.
Bolteria luteifrons
Bolteria luteifrons is a species of plant bug in the family Miridae, first described by Knight in 1921. It is one of several North American species in the genus Bolteria, which are small predatory or phytophagous true bugs. The species has been documented across eastern and central North America, with Canadian records confirmed in Ontario. Male genitalia morphology has been illustrated in taxonomic revisions to aid species identification.
Bothrideres geminatus
Bothrideres geminatus is a species of dry bark beetle in the family Bothrideridae. The species is found in North America, with records from Ontario, Canada and the United States. Its larvae develop under dry bark of dead trees, where they function as parasitoids of Chrysobothris beetle larvae. The species is part of a family whose members are predominantly parasitoids of wood-boring insects.
Calligrapha amator
Ontario Calligrapha
Calligrapha amator, commonly known as the Ontario Calligrapha, is a leaf beetle species in the family Chrysomelidae. It was described by W.J. Brown in 1945. The species is found in North America, with confirmed records from Ontario and Québec in Canada.
Calligrapha apicalis
Calligrapha apicalis is a leaf beetle species in the family Chrysomelidae, described by Notman in 1919. It is native to North America, with confirmed records from Ontario and Québec in Canada. Like other members of the genus Calligrapha, it likely exhibits the characteristic dome-like body shape and patterned elytra typical of this group.
Cantharis lecontei
soldier beetle
Cantharis lecontei is a species of soldier beetle (family Cantharidae) described by Fall in 1936. It is native to North America, with confirmed records from Ontario, Canada and broader North American distribution. As a member of the genus Cantharis, it shares the characteristic soft, flexible elytra that give soldier beetles their common name of 'leatherwings.'
Catocala robinsonii
Robinson's Underwing
Robinson's Underwing (Catocala robinsonii) is a medium-sized underwing moth in the family Erebidae, first described by Augustus Radcliffe Grote in 1872. The species is characterized by cryptic forewings that conceal brightly patterned hindwings, a defensive trait common to the genus Catocala. It occurs primarily in eastern and central North America, with larvae specializing on hardwood trees including hickory, walnut, and oak.
Catocala serena
Serene Underwing
Catocala serena, the serene underwing, is a moth in the family Erebidae. It is found in eastern North America from southern Ontario and New England south to Tennessee, and west to Illinois and eastern Wisconsin. Adults are active from July to September with one generation per year. The larvae feed on shagbark hickory (Carya ovata) and black walnut (Juglans nigra).
Celina hubbelli
Hubbell's Predaceous Diving Beetle
Celina hubbelli is a species of predaceous diving beetle in the family Dytiscidae, described by Young in 1979. It is found in North America, with confirmed records from Ontario and Québec in Canada. The species is named in honor of the entomologist. As a member of the genus Celina, it belongs to the tribe Methlini within the subfamily Hydroporinae.
Chaetocnema fuscata
Chaetocnema fuscata is a flea beetle (subfamily Alticinae) in the leaf beetle family Chrysomelidae. It was described by R. White in 1996 as part of his revision of the genus Chaetocnema in North America. The species is known from North America, with records from Ontario, Canada. Like other members of the genus, it is among the smallest flea beetles, with adults typically measuring 1–2 mm in length. The genus Chaetocnema includes several species associated with specific host plants, though detailed biological information for C. fuscata specifically remains limited.
Closterocerus damastes
Closterocerus damastes is a species of chalcid wasp in the family Eulophidae, first described by Francis Walker in 1847. It belongs to the subfamily Entedoninae, a group of small parasitoid wasps. The genus Closterocerus includes species that are primarily parasitoids of other insects. Distribution records indicate presence in Canada, specifically Ontario.
Coccinella trifasciata perplexa
American Three-banded Lady Beetle
Coccinella trifasciata perplexa is a subspecies of three-banded lady beetle in the family Coccinellidae. It occurs in North America and has been documented as a host for the parasitoid wasp Perilitus coccinellae in Ontario, where approximately 7% of adult beetles were parasitized in field studies. The subspecies is part of a broader species complex with distribution across multiple continents.
Cophes fallax
Cophes fallax is a species of hidden snout weevil in the beetle family Curculionidae, described by Kissinger in 1964. It is known from North America, with confirmed records from Ontario, Canada and Vermont, United States. The species belongs to a genus of weevils characterized by concealed mouthparts, a trait that gives the group its common name.
Copidosoma lymani
Copidosoma lymani is a species of parasitoid wasp in the family Encyrtidae, described by Howard in 1907. Like other members of its genus, it is presumed to be a polyembryonic parasitoid that develops within lepidopteran hosts. The species is known from Canada, specifically Ontario. Very little species-specific biological information has been published.
Corythucha juglandis
Walnut Lace Bug
Corythucha juglandis, the walnut lace bug, is a univoltine or bivoltine lace bug (Hemiptera: Tingidae) native to North America and specialized on walnut (Juglans) host plants. Adults overwinter in leaf litter and become active in April or May, synchronizing with host leaf phenology. The species aggregates on the undersides of leaflets for feeding and reproduction. Both adults and nymphs are gregarious. It has been studied in Ontario, Québec, Canada, and southern Illinois, USA, with some geographic variation in voltinism reported.
Crambus youngellus
Young's Grass-veneer
Crambus youngellus, known as Young's Grass-veneer, is a small moth species in the family Crambidae. It was described by William D. Kearfott in 1908. The species is restricted to northeastern North America, with records from the northeastern United States and southern Ontario. As a member of the grass-veneer group, it likely shares ecological associations with grasses and sedges typical of the genus Crambus, though specific natural history details remain poorly documented.
Didineis latimana
Didineis latimana is a species of solitary wasp in the family Crabronidae (formerly treated as Bembicidae). It belongs to the subfamily Bembicinae and tribe Alyssontini. The species was described by Malloch and Rohwer in 1930 and is known from North America, with records from Canada including Ontario.
Dioryctria resinosella
red pine shoot moth
Dioryctria resinosella is a conifer-feeding moth in the family Pyralidae, described in 1982. The larvae are specialized shoot borers of red pine (Pinus resinosa), attacking new shoots and cones. This species exhibits localized infestation patterns within plantations and has a univoltine life cycle with discrete seasonal activity. It is known from Ontario and the northern United States, with detailed bionomics studied in Wisconsin sand plain plantations.
Dromaeolus badius
Dromaeolus badius is a species of click beetle in the family Eucnemidae. The species was described by Melsheimer in 1845. It has been recorded in the Canadian provinces of Ontario and Québec. As a member of Eucnemidae, it belongs to a group of beetles commonly known as false click beetles, which are typically associated with decaying wood and forest habitats.
Ectopria leechi
water penny beetle
Ectopria leechi is a species of water penny beetle in the family Psephenidae, first described by Brigham in 1981. The species is found in North America, with documented occurrences in Ontario, Canada. Like other members of Psephenidae, the larvae are aquatic and have a distinctive flattened, circular body form. Adult beetles are terrestrial.
Ephoron leukon
white fly
Ephoron leukon, commonly known as the white fly, is a species of pale burrower mayfly in the family Polymitarcyidae. Nymphs are burrowing and inhabit tubular burrows associated with stones in river rapids, particularly in fine silt deposits. The species undergoes dramatic morphological changes during early nymphal development, including specialized mouthpart modifications for filter feeding and progressive elaboration of abdominal gills.
Etainia thoraceleuca
Etainia thoraceleuca is a North American moth in the family Nepticulidae, described in 2024 as the second native American species in the genus. It is known from light-collected adults across California, Arizona, and Ontario, Canada. The species is a specialist feeder on Ericaceae, with larvae making short leafmines on Arbutus and Arctostaphylos species before continuing development in stems and branches. It is sister to the European species E. albibimaculella.
Eucicones marginalis
Eucicones marginalis is a species of cylindrical bark beetle in the family Zopheridae, described by Melsheimer in 1846. The genus Eucicones belongs to the subfamily Colydiinae, a group commonly known as cylindrical bark beetles due to their elongated, parallel-sided body form. Members of this family are primarily associated with dead and decaying wood, where they feed on fungi or are predatory on other wood-inhabiting insects. The species is documented from North America, with records from Ontario, Canada.
Eucrada humeralis
Eucrada humeralis is a species of deathwatch beetle in the family Ptinidae. It is native to North America, with records from Ontario and Québec in Canada. The species was described by Melsheimer in 1846.
Eugnamptus angustatus
leaf rolling weevil
Eugnamptus angustatus is a leaf rolling weevil in the family Attelabidae. It is native to North America, with confirmed records in Ontario, Canada. The species is associated with Sassafras albidum, with larvae observed as leaf miners of dead leaves. Two subspecies are recognized: E. a. angustatus and E. a. testaceus.
Exenterus amictorius
Exenterus amictorius is an ichneumonid parasitoid wasp introduced to North America that attacks sawfly larvae (Hymenoptera: Diprionidae), particularly during the pre-spinning eonymph stage. The species exhibits adaptive host discrimination behavior that changes during the host's spinning period, lacks discrimination initially but rapidly acquires and maintains this ability. It shows strong positive density-dependent responses to host abundance and has established successfully on multiple diprionid hosts across North America. In multiparasitism situations with the native E. diprionis, E. amictorius consistently survives due to faster larval development.
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fairfaxensis
Forcipomyia fairfaxensis is a species of biting midge in the family Ceratopogonidae, first described by Wirth in 1951. It is placed in the subgenus Lasiohelea. The species has been documented bloodfeeding on frogs in Algonquin Park, Ontario. Like other Forcipomyia species, it possesses distinctive antennal and palpal sensilla that have been studied morphologically.
Gammarus pseudolimnaeus
Northern Spring Amphipod
Gammarus pseudolimnaeus is a freshwater amphipod crustacean inhabiting lotic (flowing water) environments in North America. The species exhibits complex behavioral ecology, including size-selective predation vulnerability to fish predators such as brook trout and sculpins, and chemically-mediated responses to predation risk that influence reproductive behavior. Population dynamics are characterized by univoltine (single annual) generation cycles with high mortality during early life stages and winter periods. The species serves as an important prey item in stream food webs and has been extensively studied as a model organism for freshwater invertebrate ecology, toxicology, and predator-prey interactions.
freshwaterloticamphipodpredator-preybehavioral-ecologytoxicologyunivoltineNorth-Americamodel-organismstream-ecologysize-selective-predationchemical-ecologyparasitismacanthocephalacopper-toxicitymate-guardingcalceolimicrohabitat-selectionthigmotaxisdiel-activityseasonal-dynamicsproduction-ecologydriftbrook-troutsculpinOntarioVirginiaGammaridaecrustaceaninvertebratesenticaudataBousfield-1958Northern-Spring-AmphipodGlyphonyx testaceus
Glyphonyx testaceus is a click beetle (family Elateridae) native to North America. It belongs to the tribe Ctenicerini within the subfamily Dendrometrinae. The species was described by Melsheimer in 1845 and is recorded from Ontario, Canada. Like other click beetles, it possesses the family-characteristic prosternal process that enables the "clicking" escape mechanism.
Haplostethops ellipsoideus
Haplostethops ellipsoideus is a species of weevil in the family Curculionidae, described by Casey in 1920. It belongs to a genus of small weevils whose members are poorly documented in the literature. The species has been recorded from Ontario, Canada, suggesting a northern distribution within North America. Very few biological details have been published for this species.
Hebestola pullata
Hebestola pullata is a longhorn beetle (family Cerambycidae) in the subfamily Lamiinae. The species was described by Haldeman in 1847 and is currently considered valid, though it has been treated as a synonym of Hebestola nebulosa in some taxonomic databases. It is known from eastern North America, with records from Ontario and Québec in Canada.
Hexarthrum ulkei
eastern wood weevil
Hexarthrum ulkei, commonly known as the eastern wood weevil, is a species of true weevil in the beetle family Curculionidae. It occurs in North America, with records from Ontario and Québec in Canada. The species has been documented with unusual host associations that expand its known ecological range beyond previously understood limits. As a member of the tribe Hexarthrini, it possesses the characteristic elongated rostrum typical of weevils.
Hydropsyche morosa
A net-spinning caddisfly species found in summer-warm rivers of southern Ontario. Has been observed to be bivoltine in lower river reaches where summer water temperatures exceed 24°C for extended periods. Larger-bodied than the sympatric Hydropsyche bronta, with which it shares habitat in the Credit and Humber river systems.
Hylobius radicis
Pine Root Collar Weevil
Hylobius radicis is a pine weevil in the family Curculionidae, described by Buchanan in 1935. Adults serve as hosts for the endoparasitic wasp Microctonus pachylobii, with field studies documenting parasitism rates of 8.5%. Parasite loads show seasonal variation, with higher rates observed in April–June compared to August–September.
Hymenochara rufipes
Hymenochara rufipes is a species of darkling beetle in the family Tenebrionidae, described by John Lawrence LeConte in 1824. The specific epithet "rufipes" refers to reddish legs, a common diagnostic trait in this species. As a member of Tenebrionidae, it belongs to one of the largest beetle families, with members typically associated with dry habitats and often exhibiting nocturnal behavior. The species is documented from eastern Canada, specifically Ontario and Québec.
Hyptia harpyoides
Hyptia harpyoides is a species of ensign wasp in the family Evaniidae, first described by Bradley in 1908. This small parasitoid wasp is known from North America, with records from Canada including Ontario. It has been documented as a parasite of Parcoblatta cockroach eggs. The species belongs to a group of wasps characterized by their distinctive abdominal morphology and cockroach egg parasitism.
Ilybius oblitus
Ilybius oblitus is a predaceous diving beetle in the family Dytiscidae, first described by Sharp in 1882. It occurs in North America, with confirmed records from Ontario, Canada. The species has been documented to tolerate low temperatures, though it remains susceptible to freezing. Observations of this species are sparse, with limited biological data available.
Longitarsus turbatus
Longitarsus turbatus is a flea beetle species in the family Chrysomelidae, first described by Horn in 1889. Records indicate presence in the Canadian provinces of Ontario and Québec. As a member of the genus Longitarsus, it possesses enlarged hind femora adapted for jumping. Specific ecological details remain poorly documented.