S94 Trans. Acad. Sci. of St. Louis. 



abdomen very dark or blackish -piceous, the prothorax much paler, 

 testaceous, somewhat clouded with pale piceous, the head black; legs 

 pale, the antennae piceo-rufous; head in form and punctuation and the 

 pronotal sculpture nearly as in hamatus; prothorax obviously narrower 

 than the head, elongate, with the sides rather feebly converging from 

 near the apex to the base; elytra somewhat longer than wide, rather 

 distinctly wider than the prothorax but only just visibly wider than the 

 head, the sculpture as in hamatus; abdomen finely and inconspicuously 

 punctulate. Length 5.0 ram.; width 0.78 mm. Nevada (Reno), Wyo- 

 ming (Laramie) and Manitoba macileutns n, sp. 



11 — Form slender, parallel, only moderately convex, very pile piceo-testa- 

 ceous in color, the head darker and the elytra much paler and more 

 flavate; legs pale, the antennae darker and with the second joint 

 slightly longer and thicker than the third; head moderate, the sides 

 subparallel and the angles well rounded, distinctly elongated behind 

 the antennae, the punctures not very coarse but deep and close -set 

 toward the sides, the post-ocular line normal, rather finely, closely 

 punctured, the punctures of the under surface rather fine and sparse 

 and rendered still less distinct because of the ground sculpture; pro- 

 thorax elongate, distinctly narrower than the head, the sides moder- 

 ately converging from near apical third to the base; medial series com- 

 posed of 12-14 very close-set punctures, the sublateral series also with 

 many close -set punctures and there are numerous others scattered 

 toward the apical angles; elytra elongate, fully as long as the prothorax 

 and much wider, distinctly wider than the head, the punctures moder- 

 ate in size and rather feebly impressed, somewhat close- set, the 

 arrangement nearly as in hamatus; abdomen minutely and inconspicu- 

 ously punctulate toward the sides. Length 4.2 mm. ; width 0.62 mm. 

 Montana to Arizona and New Mexico fragilis n. sp. 



Group III. 



Hjpnogyra n. subg. 



Punctures of the head and pronotum very fine and sparse, the head more 

 strongly convex than in the preceding groups and without the flattened 



post-ocular line 2 



Punctures of the head coarse as well as sparse 3 



2 — Body rather stout, parallel, convex, very highly polished, black, the 

 elytra and legs bright rufous throughout, the abdomen blackish -piceous 

 throughout above, the apices of the segments paler beneath, the antennae 

 dusky rufous; head behind the antennae but little longer than wide, 

 just visibly inflated toward base, the angles broadly rounded; sides 

 very feebly arcuate, the punctures extremely small and remotely sepa- 

 rated, not closer at the sides or beneath, the median impunctate area 

 onusually wide; oblique ocular grooves distinct; flanks behind the eyes 

 evenly convex; antennae unusually thick, about as long as the entire 

 head, the subapical joints closely joined and rather strongly transverse, 

 the second joint noticeably longer and thicker than the third; prothorax 

 but little longer than wide, somewhat wider than the head, the angles 



