Bridge-constructing
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Pterocheilus hirsutipennis
A solitary mason wasp in the subfamily Eumeninae, Pterocheilus hirsutipennis is one of approximately 40 North American species in this genus. Like other Pterocheilus, females are fossorial, excavating subterranean burrows in sandy or soft soils rather than using pre-existing cavities or building mud nests. The species was described by Bohart in 1940 and is part of a genus whose members are most diverse in the southwestern United States. Most species biology remains poorly documented.
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