368 CASEY 



dark piceo-rufous ; head transverse, the occiput rather finely 

 punctato-strigose but only near the base at the middle, more com- 

 pletely and obliquely rugulose toward the eyes, the vertex very 

 minutely, sparsely punctulate and polished ; prothorax nearly 

 three-fourths wider than long, the apex evidently narrower than 

 the base, both subtruncate, the former however with the angles acute 

 and anteriorly prominent, the basal angles slightly acute and dis- 

 tinctly, posteriorly produced, the sides feebly and subevenly arcu- 

 ate ; disk widest at base, the punctures uneven, large and small 

 intermingled, generally moderate in size and ver}' sparse medially, 

 without impunctate line, gradually very coarse and close laterally, 

 becoming confluent only very near the sides ; elytra scarcely two 

 and one-half times as long as the prothorax, and, behind the mid- 

 dle, slightly wider, the sides slightly arcuate, the apex very ob- 

 tusely subparabolic, the punctures very coarse, close-set in slightly 

 impressed series, becoming obsolescent at apical third, the inter- 

 vals subconvex, finely, sparsely and confusedly punctate ; abdo- 

 men finely, sparsely punctate medially. Length 6.0 mm. ; width 

 3.0 mm. Texas (Marfa) nympha n. sp. 



Epistoma finely but more strongly and densely punctate 3 



3 — Apical angles of the prothorax very broadly produced anteriorly ; 



elytral punctures very coarse, the series somewhat impressed 4 



Apical angles very abruptly produced anteriorly ; elytral punctures 

 much smaller, the series unimpressed, the intervals flat 5 



4 — Form rather elongate, strongly convex as usual, black, the under 



surface and legs dark-rufous, polished ; head nearly as in nympha 

 but with the punctured strigae stronger and more wide-spread, the 

 vertex finely, sparsely punctate at the middle anteriorly ; pro- 

 thorax two-thirds wider than long, widest at the base, the apex 

 much narrower, truncate except toward the advanced acute angles, 

 the basal angles right and evidently produced posteriorly ; sides 

 subevenly and moderately arcuate, becoming a little more con- 

 verging and slightly sinuate near the apex, the surface subevenly 

 but rather coarsely, moderately closely punctate, without impunc- 

 tate line, the punctures rapidly still coarser, dense and longitudi- 

 nally confluent in about lateral sixth ; elytra two and three-fourths 

 times as long as the prothorax, and, at the middle, slightly wider, 

 the sides broadly arcuate, the apex somewhat gradually but ob- 

 tusely ogival, the very coarse and moderately close-set serial punc- 

 tures becoming obsolescent at apical two-fifths ; abdomen finely, 

 sparsely punctured mediall}^, the basal segment coarsely so 

 throughout. Length 5.5-6.7 mm. ; width 2.65-3.0 mm. Colo- 

 rado and New Mexico pruinosa Lee. 



Form much stouter and decidedly piceous in color, the elytra frequently 

 dull rufous, the under surface and legs paler rufous, shining; head 

 similarly rather coarsely punctato-strigose ; prothorax three-fourths 

 wider than long, the apex and base as in pruinosa but with the 

 basal angles much less distinctly produced posteriorly, the sides 



