ABSTRACT
Pronotum narrowed in front, transverse, convex, the hind angles acute; lateral margins explanate or with fine carina at least on posterior half; pleural regions (hypomera) mostly concave or with a distinct and sharply circumscribed excavation for the reception of the antennae; prosternum usually produced posteriorly and lobed in front; procoxal cavities open behind. Mesosternum subquadrate or elongate, entire or sulcate; sulcus when present on anterior half only or completely dividing mesosternum. Metasternum subquadrate or shorter than wide. Legs mostly retractile; trochantin of fore and middle leg exposed; anterior coxa conical, prominent; middle coxa oval; hind coxa transverse, mostly with groove for reception of femur; trochanter large, triangular, fore and middle pair interstitial; femur swollen; hind femur usually with ventral groove for partial reception of the tibia; tibia slender, spinose, the apical spurs distinct; tarsal formula 5-5-5, tarsomeres one to four short; claws simple. Scutellum mostly visible, small to moderate, triangular. Elytra entire, apically rounded; not or very indistinctly striate; epipleural fold generally distinct, some-
times feebly developed or absent. Wing venation variable; wedgecell open by lack of fusion of 2A and 3A. Folding pattern variable, incomplete, area A not well developed, replaced by a small adjustment fold between B and G only, the anal lobe free, or otherwise modified (see Forbes 1922, 1926).
