274 MEMOIRS ON THE COLEOPTERA 



very radically by the prosternal characters as stated ; the lateral 

 ascending prosternal striae are more widely separated at apex in 

 bigemmeus than in parvus. 



Saprinus strigitarius n. sp. Rather broadly oblong-oval, convex, 

 black, the legs also black throughout; upper surface with bronzy lustre; 

 head transversely and irregularly rugose antero-medially, coarsely and 

 closely punctate laterally and smooth and minutely, remotely punctate 

 on the occiput; prothorax evidently less than twice as wide as long, the 

 moderately converging sides very feebly arcuate, gradually strongly 

 rounded at apex; surface minutely, closely punctulate anteriorly and 

 strongly and densely so, though not very coarsely, broadly toward the 

 sides, these punctures elongate but not lineiform; those at base small, 

 deep, close and confused for a considerable distance from the margin, 

 the smooth space not well denned, short and transverse; elytra not 

 quite one-half longer than the prothorax, the sides faintly and obtusely 

 swollen basally; surface with compressed longitudinal rugulosity, the 

 channels of which have distinct small deep rounded punctures, the 

 scutellar mirror nearly as in bigemmeus; flanks smooth basally; striae 

 rather short, very oblique and not sharply marked, the fourth arching 

 and joining the fine sutural, which is evanescent posteriorly; outer sub- 

 humeral distinct, not very close to the lateral, the inner a rather long 

 oblique line at the middle; pygidium convex, not very coarsely but 

 deeply and closely punctate; prosternal strise strong, straight, parallel, 

 rapidly diverging at base, the free anterior ends at apical fourth, the 

 oblique lateral lines bent, the apical part straight, the two coming to- 

 gether at the anterior margin in an acute angle; mesosternum minutely, 

 sparsely punctulate; anterior tibiae with the teeth small, seven or eight 

 in number and not very unequal. Length 2.3-2.6 mm.; width 1.6-1.75 

 mm. Idaho (Cceur d'Alene). Two examples. 



Allied to bigemmeus and greatly resembling it in sculpture, but 

 differing in the formation of the prosternum and also in the anteri- 

 orly more narrowed prothorax; the elytral sculpture is not so 

 fine and the punctures are very much more distinct among the 

 longitudinal rugae. 



The two following species are very aberrant in the densely 

 and evenly rugose head behind the transverse entire frontal carina, 

 which is finer and more sharply elevated than in any other species 

 of this subgenus, but, as they differ greatly between themselves 

 in prosternal structure, I can at present perceive no structural 

 departures sufficiently radical to warrant a separate subgenus for 

 them: 



Saprinus scabriceps n. sp. Oblong, convex, piceous-black, the pygid- 

 ium dull, the legs bright, rufous; entire upper surface micro-reticulate 

 and feebly alutaceous; head densely and strongly rugose, becoming 



