162 Trans. Acad. Sci. of St. Louis. 



3 — Gular sutures gradually converging as usual, but remaining well sep- 



arated toward the base of the head 4 



Gular sutures becoming so nearly fused as to be inseparable with certainty 

 toward the base of the head 5 



4 — Body very slender, pale testaceous, rather shining, the head very large 



as usual, nearly as long as wide, much wider than the prothorax, dis- 

 tinctly wider toward base than across the very small anterior eyes, the 

 sides broadly arcuate and the basal angles widely rounded; punctures 

 small but strong and close-set; prothorax distinctly obtrapezoidal, 

 somewhat wider than long, the angles rounded and the sides very feebly 

 sinuate toward the middle, more finely and sparsely punctured than the 

 head; elytra small, quadrate, only very slightly wider and longer than 

 the prothorax, rather closely and rugosely punctate ; under surface of 

 the head pale rufous, convex, shining, finely and sparsely punctate, the 

 gular sutures strongly impressed and distinct. Male unknown. Length 

 4.5 mm.; width 0.75 mm. California (Hoopa Val., Humboldt Co.). 



sinnatocolle Csy. 

 Body much less slender and more depressed, dark testaceous in color 

 throughout and rather less shining, the head relatively not so large, 

 wider than long, the eyes more prominent and the sides behind them 

 more nearly parallel and feebly arcuate, the width subbasally scarcely 

 perceptibly greater than across the eyes, the angles broadly rounded; 

 punctures finer, rather close -set; prothorax nearly as in sinnatocolle 

 but without visible sinuation at the sides and less markedly narrower 

 than the head; elytra distinctly longer, quadrate, a fifth or sixth wider 

 than the prothorax and nearly a third longer, similarly punctate; under 

 surface of the head rather strongly and closely punctate, the gular 

 sutures less impressed and with the intervening space longitudinally 

 impressed toward base. Sinus at the middle of the sixth male ventral 

 of the usual form, deep and broadly rounded at the bottom. Length 

 4.5 mm. ; width 0.85 mm. Idaho (Coeur d'Alfene), — Mr. Wickham. 



helenae n.sp. 

 5 — Body moderately slender, larger in size and less depressed, dark cas- 

 taneous in color throughout, slightly dull in lustre, the punctures — 

 particularly of the head — being close-set; head large, not swollen at 

 base, the sides behind the small and anterior eyes being parallel and 

 broadly, evenly arcuate ; basal angles only moderately broadly rounded; 

 prothorax much narrower than the head, wider than long, obtrape- 

 zoidal with the sides nearly straight, the angles rounded; elytra 

 small, quadrate, only very slightly wider, though obviously longer, 

 than the prothorax and distinctly narrower than the head ; under sur- 

 face of the head rather strongly, moderately closely punctate, pale in 

 color, the double gular suture deeply impressed. Male sexual char- 

 acters of the usual form, the semicircular notch of the sixth ventral 

 moderately large. Length 4.7 mm.; width 0.8 mm. California (Sta. 



Clara Co.) lepidnm Csy. 



Body rather stout, somewhat depressed, parallel, dark castaneo-testaceous 

 in color throughout and moderately shining; head moderately large, 

 wider than long, inflated toward base, where it becomes much wider 

 than across the eyes, the basal angles broadly rounded ; punctures fine 



