Ectemnius maculosus (Gmelin, 1790)

 

Synonyms:Crabro frigidus, Crabro oblongus, Crabro quadrangularis, Crabro quatuordecimmaculatus, Crabro singularis, Crabro trapezoideus, Ectemnius oblongus, Ectemnius singularis, Ectemnius trapezoideus, Solenius singularis, Solenius trapezoideus, Vespa maculosa

 

 

Ectemnius maculosus is found in eastern North America in both Canada and the United States, and in temperate Eurasia. Small solitary wasp (ca. 10 mm in length); the head is square-shaped, black; eyes black; antennae with yellow scape and dark-brown flagellum; thorax black; abdomen is black with four yellow bands, interrupted medially; femurs black; tibia and tarsi yellow; wings brown. Adults nectar on flowers, e.g., Narrowleaf Meadowsweet (Spiraea alba). Nests are built in the soft pith of twigs; larvae feed on paralyzed flies supplied by females. Active mid-summer to late summer.

 

		D29674 Square-headed wasp (Ectemnius maculosus) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
		D29675 Square-headed wasp (Ectemnius maculosus) Bruce Peninsula National Park Ontario, Canada Copyright © Michael Patrikeev All Rights Reserved
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