Lawson: Genus Acinopterus. 115 



with the apex subacute, hind edge broadly concave. Vertex rather short, 

 sloping, convex or more or less impressed behind the apex, surface punctured, 

 the anterior submargin obscurely transversely rugose, passage to the front 

 roimded. Front rather broad, at the base slightly encroaching upon the apex 

 of the vertex, suddenh^ narrowed at tip. Clypeus much widened apically. 

 Lorae large. Cheeks wide. Pronotum broad and rather short, anterior edge 

 broadly arcuate, posterior nearly straight; sides long, oblique, carinated; 

 lateral angles prominent, latero-posterior rounded. Scutcllum rather small. 

 Elytra narrow, lanceolate at apex, the tip acute, appendix wanting; sutural 

 edge straight to the extreme tip; costal and apical margins continuous; apical 

 areoles five, inner small, oblique, second largest, reaching the extreme tip; 

 third and fourth small; fifth, or stigmatal, long and usually crossed by one or 

 two transverse veinlets; first and second sectors united by but one transverse 

 nervure, but there are usually three or four connecting the outer claval nervure 

 with the claval suture; all the nervures strong; costa feebly convex. Super- 

 numerary cell of the wings present. Otherwise as in Athysanus and Allygus. 



The above description needs modification to enable it to include 

 the several species in which the tegmina, while visibly narrowed 

 apically, do not end in an acute tip, the sutural margin in these 

 cases not continuing on straight to the extreme apex, but meeting 

 the costal margin to form a rather broadly rounded tip. The writer, 

 therefore, proposes the following generic description: 



Head usually narrower than pronotum, rarely as wide. Vertex rounded or 

 distincth' angulate, usually impressed behind the apex, sloping, broadly round- 

 ing with the front. Front broad basally, much narrowed apically. Clypeus 

 widened apically. Lorse large, nearly reaching margin of the wide gense ven- 

 trally. Pronotum wide, over twice as wide as long, anterior and posterior 

 margins nearly parallel, latter usually more nearly straight; lateral and 

 humeral margins distinct; disc transversely wrinkled. Scutellum finely granu- 

 lar and with distinct transverse impressed line. Tegmina moderately long, apex 

 alwaj's narrowed, sometimes to an acute tip. Venation distinct. Of the five 

 apical cells M4 is the largest, but it, along with Cui and Ro, is frequently 

 divided by cross-veins, R2 being so regularly divided that probably both Ri 

 and R2 are present. Cell 2d M is not divided by a cross-vein. Veins 1st A and 

 2d A almost always connected by one or more cross-veins. Valve of male 

 always hidden under last ventral segment; plates usually long but never 

 equaling pygofers. Female, last ventral segment large, always bearing a median 

 notch. 



