Lawson: Genus AciNOPTERrs. 119 



Acinopterus angulatus n. sp. 



(PI. VIII, fig. 8; pi. IX, fig. 3; pi. X, fig. 2; pi. XI, fig. 4; pi. XII, figs. T), 6.) 



A smaller species than the preceding, vaiying from light" to dark brown in 

 color, but uniformly lighter than acuminatus and lacking its olive-green tinge. 

 Length, 5 to 6.25 mm. 



Form. Head broad, scarcely narrower than prothorax. Vertex broad and 

 short, over twice as wide as long, about one-third longer at middle than next 

 the eyes, anterior margin rounded or slightly angulate, sloping, and with an 

 impressed line behind the apex. Front broad and short, lorse, clypeus and 

 gense characteristic of the genus. Pronotum over twice as wide as long, an- 

 terior margin broadly convex, posterior margin shallowdy concave, lateral and 

 humeral margins distinct, the disc transversely wrinkled. Scutellum finely 

 granulated, the transverse impressed line curved and distinct. Tegmina with 

 sutural margin rimning straight clear to the tip, forming an acute apex. 

 Venation distinct, with from one to several cross-veins between the first and 

 second anal veins. 



Color. Vertex, pronotum and scutellum browTi or yellowish brown. Scu- 

 tellum with basal angles and three longitudinal lines, light. Elytra brown, the 

 veins margined with darker brown, so that many of the cells, especially along 

 the costa and apicallj^ appear light. Face browTi; front with eight pairs of 

 dark-brown lines, wliich are longest above and shortest below, leaving the mid- 

 dle portion unmarked. Below browm, but with parts of thorax, the coxae and 

 femora of the meso- and metathoracic legs and the dorsum of the abdomen 

 usuall}- black or dark brown. 



External genitalia. Female: Last ventral segment twice as long as pre- 

 ceding, the posterior margin varying from slightly concave to slightly convex, 

 but always with a shght median notch and foiTning very distinct lateral angles 

 with the long lateral margins. Pygofers moderately wide, sparsely spined, ex- 

 ceeded shghtly bj^ the ovipositor. Male: Last ventral segment long, hiding 

 the valve. Plates broad, about the length of the last ventral segment, only 

 slight h' narrowing to the obtuse tips which are divergent medially, but have 

 distinct lateral angles. Pygofers with a few stout spines and exceeding the 

 plates by about two-thirds the length of the latter. 



Internal male genitalia. Styles with rather small and pointed anterior ends, 

 widest at point of the distinct process to the connective, then strongly curved 

 to the very wide apices, which are quite granulated and clearly concave be- 

 tween the outer angle and the larger, more produced inner apex. The outer 

 margin bears a few small spines. Connective heart-shaped, the apex quite 

 broad. (Edagus of the pattern characteristic of the genus, the basal processes 

 well developed and toothed, the terminal process veiy long, clearly showing 

 the penis, which opens at the fimbriate extreme apex of the process. 



Distribution. With one exception, a specimen from Washington, 

 D. C, all the material at hand came from the South and West. A 

 single specimen was taken in Yucatan, many specimens coming 

 from other parts of Mexico. We are evidently safe in calling it a 

 southwestern species, which may possibly extend its range into the 

 southeastern states. The following are the locality records of the 



