32 MEMOIRS ON THE COLEOPTERA. 



feeble transverse ante-scutellar impression; elytra parallel, fully as 

 wide as any part of the prothorax, the suture a fifth longer than the latter; 

 abdomen at base distinctly narrower than the elytra though not so 

 markedly so as in the preceding, nearly similar otherwise throughout. 

 Length 2.8 mm.; width 0.68-0.73 mm. California (Lake Tahoe). 



Distinguishable from the preceding by its smaller size, slightly 

 narrower form, smaller eyes, differences in the last antennal joint 

 and in its longer elytra. 



Oxypoda juncea n. sp. Much more slender, moderately convex, 

 slightly shining, the abdomen more opaque, the asperities there of the 

 same general form but smaller, closer and more uniform throughout, 

 almost as small and dense throughout the apical part as basally; color 

 dark piceous, the head blackish, the abdomen black with pale segmental 

 apices, the pale rufous elytra blackish toward the suture, more broadly 

 so basally; head only slightly wider than long, just visibly inflated basally, 

 the eyes slightly convex, at not quite their own length from the base, 

 with the dense convex facets fine anteriorly, gradually coarser posteriorly; 

 antennae piceous-black, paler basally, rather slender, gradually feebly 

 incrassate, the third joint but little shorter than the second, fourth slightly 

 longer than wide, the tenth two-fifths wider than long, the last long, 

 slender, ogivally pointed, longer than the two preceding, the feeble 

 constriction rather behind the middle and outlining a basal part exactly 

 similar in form to the tenth joint; prothorax fully one-half wider than 

 long, widest at about the evenly rounded base, the sides thence distinctly 

 converging and evenly arcuate to the apex, the basal angles obtuse and 

 slightly rounded; elytra but slightly transverse, fully as wide as the 

 prothorax, the suture a third longer, the sides parallel, evenly and dis- 

 tinctly arcuate, the apical sinuses distinct; abdomen notably narrower 

 than the elytra, long and unusually slender, almost perfectly parallel, 

 the margins relatively rather thick, the fifth tergite one-half longer than 

 the fourth. Length (extended) 3.2 mm.; width 0.65 mm. New Mexico 

 (Gallup), \Yickham. 



Easily separable from the two preceding by its narrower and much 

 more slender form, narrow subparallel abdomen, longer elytra and 

 structure of the eyes and antennae. 



Oxypoda canora n. sp. Moderately slender and convex, ochreous, 

 the head and the abdomen, excepting the segmental apices, black or 

 nearly so, feebly shining, the abdomen rather notably, the asperities 

 strong, not dense, sparser and feebler posteriorly; head well developed, 

 slightly transverse, fully three-fifths as wide as the prothorax, but 

 little swollen basally, the eyes at evidently less than their own length 

 from the base; antennae short, moderately incrassate, dusky-flavate, 

 paler basally, the third joint much shorter than the second, the outer 

 joints very moderately transverse, the last as long as the two preceding; 

 prothorax one-half wider than long, widest near the obtusely blunt 



