Elongate, dark bugs with very broad heads. Some species have red mark on abdomen, possible mimicry of wasps. Nymphs resemble ants.
Key to eastern species [modified from(3)
-Pronotum with humeral angles acute, the side margins calloused and pale-->pilosulus
-Pronotum with humeral angles obtusely rounded, the side margins not distinctly paler than the disk
Head and pronotum with numerous erect hairs; pronotum usually blackish-bronzed, rather coarsely and densely punctate; membrane dark without fuscous spots; claspers of male twisted, not curved; lateral plates of female genitalia acute at apex-->eurinus
Head and pronotum with few if any erect hairs; basal half of pronotum brown, very finely and sparsely punctate; membrane pale with vague fuscous spots; claspers of male curved, divaricate at base, convergent at tip; lateral plates of female genitalia broadly rounded at apex-->conspersus
images of several spp., incl. those not yet in the guide, here(4)
Varied: fields, forest edges, usually found on herbaceous plants
May-frost in NC(5)
; Jun-Oct in MN (adults typically late summer)
Suck plant juices, but sometimes found on carrion. A. eurinus and A. conspersus often found on bush-clover, Lespedeza.