Bembix pallidipicta
F. Smith, 1873
A sand wasp in the Bembix, first described by Frederick Smith in 1873. As with other members of this genus, females construct burrows in loose, sandy substrates and provision nests with paralyzed flies for their developing larvae. The species is part of a diverse group of solitary known for their rapid, energetic movements and distinctive nesting .
Pronunciation
How to pronounce Bembix pallidipicta: /ˈbɛmbɪks ˌpælɪdɪˈpɪkta/
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Habitat
Deep, dry sand barrens and sand prairie with loose, deep sand exposures suitable for burrow excavation.
Distribution
North America and Middle America; specifically recorded from Missouri sand prairies in the Southeast Lowlands region.
Seasonality
Active during cooler periods of spring and fall; observed in early autumn when temperatures are moderate and skies overcast.
Diet
feed on flower nectar, particularly from composite flowers (Asteraceae). Larvae are provisioned with paralyzed true flies (Diptera, excluding ) by the female parent.
Life Cycle
Females excavate oblique, nearly horizontal burrows 19–57 cm long and 5–28 cm deep before hunting. is laid on first prey item or in empty before provisioning begins. occurs: female brings flies to larva as needed until maturity. Larva spins oblong cocoon incorporating sand grains, as . Usually two annually.
Behavior
Females use tarsal rakes on front legs to rapidly excavate burrows. Males participate in "sun dances" — erratic, rapid 1–2 inches above ground to detect emerging virgin females. Both sexes are fast, energetic fliers rarely remaining stationary.
Ecological Role
of true flies (Diptera), contributing to of fly in sandy . Serves as prey for cuckoo wasps (Chrysididae), velvet ants (Mutillidae), satellite flies (Sarcophagidae), bee flies (Bombyliidae), thick-headed flies (Conopidae), and robber flies (Asilidae).
Human Relevance
Generally non-aggressive; stings are not dangerously venomous to healthy humans. May be encountered in sandy recreational areas.
Similar Taxa
- Bembix americanaShares similar preferences and nesting in sand prairies; distinguished by specific morphological features not detailed in available sources.
- Tiger beetle burrows (Cicindela spp.)Both create burrows in sandy substrates; Bembix burrows are rounder with coarser, "pile" rather than "fanned" diggings at the entrance.