Agapostemon obliquus

(Provancher, 1888)

Oblique Sweat Bee

Agapostemon obliquus is a of sweat bee in the Halictidae. It is one of approximately 40-45 species in the Agapostemon, which are collectively known as metallic green sweat bees. The species is found in North America and Middle America. Like other members of its genus, it exhibits the characteristic bright metallic green coloration that makes Agapostemon bees visually distinctive and frequently mistaken for cuckoo wasps.

Pronunciation

How to pronounce Agapostemon obliquus: /ˌæɡəˈpɒstɛmən əˈblɪkwəs/

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Identification

Distinguished from other metallic green bees by specific morphological features implied by the epithet "obliquus," likely relating to oblique wing or abdominal markings. Males can be separated from females by their banded black and yellow versus the entirely metallic green abdomen of females. Distinguished from cuckoo wasps ( Chrysididae) by : Agapostemon are commonly found on flowers collecting pollen, while cuckoo wasps are rarely seen on flowers and exhibit quick, jerky movements. Distinguished from other Agapostemon species by subtle morphological differences requiring close examination; A. obliquus is not among the most commonly encountered species in the .

Appearance

Exhibits the characteristic metallic green coloration typical of the Agapostemon. is present: females are typically entirely metallic green, while males have a metallic green and with a black and yellow banded . The name "obliquus" refers to some oblique feature of its , likely in wing venation or abdominal patterning. As with other Agapostemon, females possess scopae (pollen-collecting hairs) on the hind legs.

Habitat

Nests in soil, typical of the . Favors areas with suitable soil conditions for burrow excavation. Likely found in supporting the flowering plants required for foraging, though specific habitat preferences are not well documented for this .

Distribution

Recorded from North America and Middle America. Present in both regions according to distribution data. Specific range details within these broad regions are not well documented.

Diet

that forages on nectar and pollen from a variety of flowering plants. Females collect pollen using scopae on the hind legs to provision nest for larvae.

Life Cycle

Solitary or semi-social nesting typical of the . Females excavate burrows in soil. Each nest may contain multiple provisioned with pollen and nectar. Development progresses through , larva, pupa, and stages. Specific details of social organization for this are not documented, though some Agapostemon species exhibit communal nesting where multiple females share a nest entrance.

Behavior

Forages on flowers for nectar and pollen. May visit humans to lap up perspiration for moisture and salts, a that gives "sweat bees" their . Females can sting if handled roughly, though the sting is generally mild. Males lack stingers. behavior is more direct and less jerky than that of cuckoo wasps. Males may perch on vegetation to watch for passing females.

Ecological Role

of flowering plants. Contributes to functioning through pollen transfer. As a soil-nesting , may contribute to soil aeration and nutrient cycling through burrowing activities.

Human Relevance

Beneficial in natural and agricultural settings. May occasionally land on humans to obtain moisture and salts from perspiration, which can cause minor annoyance but is harmless. Stings are possible if bees are trapped or handled roughly, but are generally mild compared to other Hymenoptera.

Similar Taxa

Agapostemon virescensSimilar metallic green appearance and shared ; A. virescens is more commonly encountered and better studied, with documented communal nesting
Agapostemon texanusSimilar appearance and ; A. texanus is noted as a common western and candidate for California state designation
Augochlora spp., Augochlorella spp., Augochloropsis spp.Virtually identical bright metallic green coloration; distinguished only by microscopic examination of morphological features
Chrysididae (cuckoo wasps)Nearly identical metallic green appearance; distinguished by (rarely on flowers, jerky movements) and lack of pollen-collecting structures

More Details

Taxonomic history

The was described by Provancher in 1888. The Agapostemon contains approximately 40-45 species, with most diversity in the Western Hemisphere. The specific epithet "obliquus" suggests a distinguishing morphological feature, but the original description has not been examined for this record.

Conservation status

Not formally assessed; likely common enough to be of least concern, though specific data are lacking.