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 anteriorlv prominent, the basal angles slightly acute and dis- 

 tinctlv, posteriorly produced, the sides feebly and subevcnlv arcu- 

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

 intermingled, generally moderate in size and verv 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. ; Nvidth 

 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 iiy7upha 

 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 evidentlv 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- 

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

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

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

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

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

 sparsely punctured medially, 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 prjiinosa but with the 

 basal angles much less distinctly produced posteriorlv, the sides 



