304 CASEY 



Form somewhat inflated posteriorly, the prothorax evidently narrower 

 than the widest part of the elytra ; wings probably less developed. 



29 



2S — Form slender, convex, shining, black, the legs piceo-rufous ; 

 head coarsely, closely punctate, with a small irregular occipital 

 impunctate spot, the sides before the eyes converging and evenly, 

 strongly arcuate to the truncate apex ; prothorax unusually convex, 

 well developed, fully three-fourths wider than long, subparallel, 

 evenly and rather strongly arcuate at the sides, the apex but little 

 narrower than the base, the basal angles minutely prominent, the 

 punctures somewhat coarse, deep, well separated, becoming only 

 slightly coarser toward the sides, somewhat abruptly dense and 

 confluent in not more than lateral fifth ; scutellum well developed, 

 transverse, broadly angulate at tip ; elytra not quite three-fifths 

 longer than wide, strongly punctured in not very close-set series, 

 the punctures of the intervals similar but still more widely spaced ; 

 abdomen finely but deeply, not very sparsely punctate medially. 

 Length 5.7-6.0 mm; width 2.4 mm. Arizona (southern). 



emarginatum Csy. 



Form still more elongate and slender than in einarginati47n^ black, 

 more piceous beneath, the legs and antennas rufous, the elytral 

 suture rufescent, rather shining; head fully two-thirds as wide as 

 the prothorax, coarsely, not very deeply, moderately closely punc- 

 tate, the occipital spot large and well defined, the sides converging 

 and evenly, moderately arcuate; prothorax scarcely two-thirds 

 wider than long, parallel, the sides evenly and moderately arcuate, 

 the basal angles nearly right, scarcely prominent, the punctures 

 moderately coarse, rather sparse, becoming somewhat abruptly 

 coarse, dense and confluent in less than lateral fifth ; scutellum 

 moderate, transverse; elytra fully three-fifths longer than wide, 

 rapidly and ogivally rounded at tip, more obtusely than in eviar- 

 ginatu7n^ barely three times as long as the prothorax as in that 

 species, the punctures more close-set in the series, less coarse and 

 strongly muricate laterally, the interstitial series regular except 

 on the first and second intervals, which are confusedly punctate; 

 abdomen finely and sparsely but distinctly punctured medially. 

 Length 6.0 mm. ; width 2.3 mm. Arizona (Riverside), — H. F. 

 Wickham fatigans n. sp. 



Form somewhat similar but stouter, parallel, the size larger, deeper 

 black, more highly polished, the legs and antenna? rufous, rather 

 strongly convex ; head nearly three-fifths as wide as the prothorax, 

 coarsely, evenly and densely cribrate, the punctures nearly in 

 contact but not crowded, the occipital spot irregular and ill- 

 defined, the sides moderately converging and nearly straight from 

 the eyes to the broadly rounded angles; prothorax almost four- 

 fifths wider than long, parallel, the sides subevenly and rather 

 strongly arcuate, the basal angles right, minutelv and distinctly 

 prominent, the punctures moderate and sparse mediall}', becoming 

 gradually very coarse and closer and finally dense and coalescent 



