ABSTRACT
Elytra elongate, more or less parallel-sided (in Trimitomerus, tapered posteriorly, and in some specimens of Pytho, widened posteriorly), covering all of abdomen or revealing only posterior part of last visible segment; disc smooth, with scattered punctures, or with distinctly raised, longitudinal intervals (Pytho); integument translucent in Trimitomerus, more distinctly sclerotized in other genera; humeri distinct; epipleura variously developed, either quite short or extended to near apices of elytra; scutellum visible, relatively long and rounded posteriorly, or wide and triangular (Sphalma); mesosternum slightly to moderately convex, subtruncate anteriorly; mesepisterna narrowly to moderately widely separated anteriorly; intercoxal process triangular, variously acute, reaching, or not quite, anterior margin of metasternum; mesotrochantins exposed; mesocoxal cavities open laterally, closed partly by mesepimera; hind wing functional; radial cell indistinctly or distinctly closed; wedge cell present, narrow; four terminal veins in medial region; metasternum convex, with discrimen about half length of sternum; anterior margin variously triangular, in contact with mesosternum, or sunken below mesocoxae (Trimitomerus); legs similar in size and shape, relatively slender; femora only slightly widened toward midlength; tibiae straight or slightly curved, without stout spines; tibial spurs short and stout to moderately long and slender (Trimitomerus), slightly unequal in length; tarsal formula 5-5-4 in both sexes, tarsi slender and simple, without lobes or lateral expansion; ventral surfaces without distinct adhesive setae.
