Ground-nesting-bees
Guides
Andrena
Mining Bees, Mining Bee
Andrena is the largest genus in the family Andrenidae, containing over 1,500 species of solitary ground-nesting bees. These bees are commonly called mining bees due to their habit of excavating burrows in soil to construct nests. The genus is nearly worldwide in distribution, absent only from Oceania and South America, and is most diverse in temperate regions with Mediterranean climates. Andrena species are important pollinators, with many exhibiting specialized relationships with particular host plants.
Andrenidae
mining bees, miner bees, bulldozer bees
Andrenidae is a large, nearly cosmopolitan family of solitary, ground-nesting bees commonly known as mining bees. The family exhibits exceptional diversity with over 2,000 described species across four subfamilies: Andreninae, Panurginae, Oxaeinae, and Alocandreninae. Most diversity occurs in temperate and arid (warm temperate xeric) regions. The genus Andrena contains approximately 1,700 species, making it one of the most rapidly speciating bee lineages known. Members are typically small to moderate-sized bees with distinctive morphological features including two subantennal sutures on the face—a primitive trait shared with sphecoid wasps—and often possess foveae (depressions) near the upper margin of the eyes. Unlike most bee families, Andrenidae have no known kleptoparasites. Some lineages, particularly within Panurginae, have evolved crepuscular (dusk-active) foraging behavior with enlarged ocelli.
Anthrax irroratus
Spotted Bee Fly
Anthrax irroratus is a bee fly (family Bombyliidae) widespread across North America, ranging from Alaska and northern Canada to Central America and the Caribbean. Adults are pollinators that frequent flowers, while larvae are parasitoids of solitary bees and wasps in at least five families. The species is one of numerous bee flies that exploit ground-nesting Hymenoptera as hosts.
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Calliopsini is a tribe of mining bees (family Andrenidae, subfamily Andreninae) comprising at least 120 described species across six genera. Members are solitary, ground-nesting bees found primarily in the Americas. The tribe includes the genera Acamptopoeum, Arhysosage, Calliopsis, Callonychium, Litocalliopsis, and Spinoliella.
Epeolini
cuckoo bees
Epeolini is a tribe of cleptoparasitic bees within the subfamily Nomadinae. Members are commonly known as cuckoo bees and are obligate cleptoparasites that exploit the nest provisions of other bee species for their own offspring development. The tribe comprises five subtribes and approximately ten genera, including Epeolus, Triepeolus, Odyneropsis, Doeringiella, and Thalestria. Several European species are considered endangered or nearly extinct, while others remain widespread.
Gaesischia
Gaesischia is a genus of bees in the family Apidae, tribe Eucerini, established by Michener, LaBerge, and Moure in 1955. Members of this genus are long-horned bees, a group characterized by elongated antennae in males. The genus is part of the diverse bee fauna of the Americas, with species distributed primarily in South America. Gaesischia species are solitary and nest in the ground, contributing to pollination of native flora.
Habropoda
digger bees, silver digger bees
Habropoda is a genus of solitary, ground-nesting bees in the family Apidae, tribe Anthophorini, comprising at least 50 described species. These bees are distributed across North America and Asia, with notable species including the silver digger bee (H. miserabilis) in western North America and the blueberry bee (H. laboriosa) in the southeastern United States. Research on Habropoda has contributed significantly to understanding chemical communication in bees, particularly regarding sex pheromone composition and exploitation by nest parasites.
Hesperapini
Hesperapini is a small tribe of bees within the family Melittidae, subfamily Dasypodainae. The tribe contains a limited number of genera and species, primarily distributed in arid regions. These bees are ground-nesting and exhibit specialized pollen-collecting structures. They represent an early-diverging lineage among bees, contributing to understanding of bee evolution.
Hoplitis
Small Mason Bees
Hoplitis is a large genus of solitary bees in the family Megachilidae, tribe Osmiini, comprising over 380 described species distributed primarily across the Palaearctic region. These bees are commonly known as small mason bees and exhibit diverse nesting strategies including burrows in soil, pre-existing cavities in wood or stone, and insect borings in dead wood. Many species are pollen specialists (oligolectic), with documented associations to specific plant genera including Allium, Reseda, Astragalus, Onosma, and others. The genus demonstrates remarkable biogeographic patterns, including disjunct distributions spanning thousands of kilometers between European and Central Asian populations.
Melitoma
chimney bees
Melitoma is a genus of solitary bees commonly known as chimney bees, comprising approximately 11-13 described species. Members of this genus are classified within the family Apidae, tribe Emphorini, and are characterized by their distinctive nesting behavior involving the construction of chimney-like turrets at nest entrances. The genus occurs in the Nearctic and Neotropical regions, with species documented from North America through Central and South America.
Meloe impressus
blister beetle, oil beetle
Meloe impressus is a species of blister beetle in the family Meloidae, native to North America. It belongs to a genus commonly known as oil beetles, characterized by their defensive secretion of cantharidin, a potent blistering agent. The species is recorded across western and central Canada and the United States. Like other Meloe species, it likely exhibits the complex life history involving parasitic larvae that exploit solitary bees as hosts, though specific details for this species remain poorly documented.
Perditina
Fairy Bees, Goblin Bees, False Goblin Bees
Perditina is a subtribe of small bees within the family Andrenidae, commonly known as Fairy Bees, Goblin Bees, and False Goblin Bees. These bees are among the smallest bees in North America, with many species measuring only a few millimeters in length. The subtribe includes the genus *Perdita*, which is extraordinarily diverse with over 800 described species, many of which are specialized pollen collectors on specific host plants. Perditina bees are primarily solitary ground-nesters and are important pollinators, particularly in arid and semi-arid regions. Their minute size and often striking metallic coloration distinguish them from other bee groups.
Pseudopanurgus
mining bees
Pseudopanurgus is a genus of mining bees in the family Andrenidae, established by Cockerell in 1897. The genus contains at least 32 described species, though some sources suggest over 130. These bees are small, ranging from 3 mm to 10 mm in body length. Their taxonomic status has been debated, with some treatments recognizing them as a subgenus of Protandrena.
Sphecodes
Blood Bees, Cuckoo Sweat Bees
Sphecodes is a genus of kleptoparasitic bees in the family Halictidae, commonly known as blood bees due to their distinctive black and red coloration. With over 300 described species, this is one of the largest genera of cuckoo bees and has a cosmopolitan distribution across all continents except Antarctica. Females lack pollen-collecting structures and instead lay eggs in the nests of ground-nesting host bees, primarily in the genera Lasioglossum, Halictus, and Andrena. The larvae consume the host's pollen provisions and develop at the expense of the host offspring.