342 CASEY 



rufous ; head rather coarsely but not densely punctate, the angles 

 very broadly rounded ; prothorax more than two-thirds wider 

 than long, widest just behind the middle, the sides strongly and 

 subevenly arcuate, strongly converging apically and basally, the 

 apex sinuate, with rather obtuse angles and nearly four-fifths as 

 wide as the base, which is feebly bisinuate, the angles right and 

 not rounded, the punctures rather small and sparse but irregular, 

 becoming abruptly coarse, close and subconfluent in lateral fourth 

 or fifth, the basal excavations not connected by an impression 

 along the beaded basal margin ; scutellum moderate, transverse ; 

 elytra two and one-half times as long as the prothorax but not 

 evidently wider, rather acutely ogival at tip, the sides feebly 

 arcuate, the humeri minutely denticulate, the punctures coarse, 

 close-set in ten slightly impressed regular series, including the 

 marginal, the series extending to the apex, six to nine basally 

 abbreviated, the interstitial punctures extremely minute, arranged 

 in single series ; under surface coarsely, sparsely punctured, the 

 abdomen minutely so medially. Length 5.4 mm. ; width 2.2 mm. 

 Nicaragua (Ometepe) *championi n, sp. 



Besides this species, the genus will without doubt comprise 

 the Central American Emnienastus /bvetcollts, confusus and 

 lavi'collis, of Champion, the first apparently differing in its 

 greater convexity and the other two in the different form of the 

 prothorax, but the author describes these species as winged, 

 although the figure oi foveicollis certainly does not give that 

 impression, and I feel confident that the wings are not large 

 enough for flight in champiom\ 



Steriphanus n. gen. 

 About half of the wingless species, heretofore referred to 

 Emnienastus^ are included in a somewhat heterogeneous group 

 for which the above generic name is suggested. The only 

 character exhibiting any marked instability is that relating to 

 the base of the prothorax, which varies from rectilinearly trun- 

 cate to strongly bisinuate or medially lobed. I fail to find any 

 other attendant distinguishing structural feature, however, ex- 

 cept certain dissimilarities in general habitus. The mandibles 

 have the usual narrowed and deflexed, feebly bifid apex, the 

 left hardly at all toothed above and the right with a small por- 

 rect tooth, feebly clasping the labrum. The eyes are moderate 

 and not very prominent, the frontal margin subeven and not 

 biemarginate, the mentum sinuate at apex, the antennie long 



