62 CASEY 



visible, the inflexed sides more shining, variably but feebly and 

 sparsely punctulate. Length 10.5-12.8 mm.; width 7.4-9.0 

 mm. Arizona (more especially southern) depressulus n. sp. 



Body oval, rather smaller than in depressulus and much more convex, 

 subopaque throughout above, the elytra with sericeous lustre ; 

 head rugulose anteriorly, with the margin more reflexed than 

 usual ; prothorax less transverse, nearly as in reticulatus but more 

 narrowed from base to apex, the sides evenly and concavely 

 explanate; elytra as long as wide, inflated, the erosions small, 

 feeble and isolated, more punctiform, the small punctures fine 

 and very feeble, scarcely muricate and clustered in small groups 

 of two to four at the erosions, the general surface almost smooth, 

 the alternate elevated lines obsolete, leaving three very feeble 

 lines on each elytron, the inflexed sides rather opaque and scarcely 

 punctate. Length n.6 mm.; width 8.0 mm. Arizona, 

 Warren Knaus subsericeus n. sp. 



7 Form much more narrowly elongate-oval than in any of the pre- 

 ceding and gradually pointed behind, deep black, subopaque; 

 head flat throughout above, moderately sinuate at apex, finely 

 and sparsely punctate ; antennae stout and strongly compressed as 

 usual ; prothorax barely two and one-half times as wide as its 

 median length, the sides evenly converging and arcuate from base 

 to apex, the latter somewhat more than half as wide as the base, 

 minutely, sparsely punctate, slightly less sparsely and less obscurely 

 toward the sides, which are moderately explanate, with a feeble 

 thickened bead ; elytra fully three times as long as the prothorax, 

 evidently longer than wide, very feebly subcostulate and with 

 large subisolated and feebly impressed opaque areas suturally, 

 which completely coalesce laterally, forming a broad opaque 

 irregular area bestrewn with very small muricate punctures, the 

 side margin with a bilaterally symmetric sinus, corresponding with 

 an epipleural impression, slightly behind the middle, a character 

 which is probably accidental in the single specimen from which 

 the description is drawn ; under surface and epipleuras less 

 opaque, minutely, sparsely punctulate. Length 11.7 mm. ; width 

 7.8 mm. Colorado (Fremont Co.), Warren Knaus. 



knausi n. sp. 



The male is usually a little smaller, narrower and more par- 

 allel in form than the female, but in brevtpenms it is very much 

 smaller and rather more dilated than the female. Individuals 

 appear to be more abundant than in any other genus of the 

 Eusatti and good series of several species are before me. 



Megasattus n. gen. 



Two species, one of which is the largest known North Amer- 

 ican member of the subfamily Coniontinas, are the only repre- 



