Coleopterological Notices, V. 569 



very short, finely closely punctate, feebly subcarinate in the middle ; pygi- 

 dium large, vertical, feebly convex, a little more coarsely and very densely 

 punctate. Prosternum transversely convex, finely, feebly punctate, the striae 

 only distinct at the sides anteriorly ; foveae deep. . Mesosternum feebly sinu- 

 ate, more coarsely but not very densely punctate ; apical stria entire. Ante- 

 rior tibiae with six or seven acute triangiilar external spines. Length 3.3 

 mm. ; width 2.4 mm. 



Wyoming- (Cheyenne). 



Also related to insertus and especially opacellus, but differing in 

 the still coarser sculpture and in the obliterated basal part of the 

 sutural stria. 



S. detractus. — Rather broadly oval, strongly convex, black, polished. 

 Head finely, closely punctate, the marginal stria feeble but long and oblique 

 subapically, obliterated near the base. Protlwrax more than twice as wide as 

 long ; sides very strongly convergent, feebly arcuate, more so near the apex ; 

 marginal stria distinct ; disk rather finely but deeply and conspicuously — 

 though sparsely — punctate, the punctures not distinctly larger but rather 

 dense near the sides, a little coarser near the base only in tiie middle. Elytra 

 three-fourths longer than the prothorax, and, at basal fourth, quite distinctly 

 wider, finely, remotely punctulate toward base, gradually rather coarsely, 

 deeply but sparsely punctate in apical two-thirds near the suture, to apical 

 fourth near the end of the second dorsal ; marginal stria inferior, extending 

 along the apex to the middle of each elytron ; outer subhumeral scarcely dis- 

 tinct from the marginal ; oblique humeral with one or two uneven internal 

 appendages ; inner subhumeral represented by a short stria behind the mid- 

 dle ; dorsals strong, feebly arcuate, slightly crenulate internally, the first 

 tliree extending to about apical third, the fourth scarcely behind the middle, 

 broadly hooked at base to the suture, the sutural stria only distinct in median 

 third. Pygidia rather finely deeply and densely punctate. Sterna minutely 

 and remotely punctulate, the prosternum broadly convex, the striae remote, 

 strongly ascending, the foveae distinct ; mesosternal stria fine but entire at 

 apex ; transverse suture strongly crenato-punctate. Anterior tibiae with 

 seven or eight small close-set and acute, spiniform teeth. Length 2.2-2.(5 

 mm. ; width 1.7-1.9 mm. 



Colorado ; Kansas. 



Allied to laridus, differing greatly however in its more broadly 

 oval form and minute punctulation of the mesosternum, this being 

 coarsely and conspicuously punctate in laridns ; the latter species, 

 in addition, has the outer subhumeral stria widely separated from 

 the marginal. Each elytron seems to have an obsolete impression 

 in the middle near the sutural stria. One specimen has the first 

 dorsal stria very short, abbreviated at the middle on both sides of 

 the body; it is simply a deformity however. My first specimen 

 Annals N. Y. Acad. Sci., VII, Dec. 1893.— 37 



