Casey — A Revision of the American Paederini. 197 



throughout, the legs and antennae brown, alutaceous because of very 

 minute reticulation, the elytra shining; head well developed, scarcely 

 longer than wide, parallel and broadly arcuate at the sides, the angles 

 broadly rounded, the base truncate; surface very finely and closely punc- 

 tate throughout; antennae not as long as the head and prothorax, with 

 Joints two to four decreasing slightly in length; prothorax much longer 

 than wide, distinctly narrower than the head, the obtuse rounded anterior 

 angles situated at apical fourth or fifth; surface more coarsely and un- 

 usually closely punctured throughout, the median line feebly elevated 

 toward base; elytra but little longer than wide and only about a fifth 

 longer than the prothorax, though fully two-fifths wider, parallel, finely 

 but strongly, asperately punctate ; abdomen parallel and elongate, wider 

 than the head ; gular sutures fine but evident,somewhat widely separated, 

 the intervening space more strongly and coarsely micro-reticulate than 

 the remainder of the surface. Male unknown. Length 3.5 mm.; width 



0.5 mm. California (Lake Tahoe) longicollis n. Bp. 



Sides of the prothorax parallel or not distinctly converging, nearly straight, 

 the obtusely rounded apical angles more anterior, at about apical fifth 

 or sixth • 4 



4 — Larger species, parallel in form, dark rufo-piceous in color, except the 



head and abdomen which are blackish; surface moderately shining, the 

 micro-reticulation of the anterior parts evident but feeble; head well 

 developed, slightly longer than wide, throughout nearly as in longicollis, 

 the antennae nearly as long as the head and prothorax, with joints two 

 and three equal in length, the fourth shorter; prothorax unusually large, 

 but little, though evidently, narrower than the head, a third longer than 

 wide, the punctures rather coarse and unusually close-set throughout 

 but not very deep; elytra but little longer than wide, parallel, very 

 finely and rather closely punctate, barely a fifth longer than the protho- 

 rax and nearly one-half wider; abdomen much narrower than the elytra 

 though obviously wider than the head; gular sutures nearly as in longi- 

 collis. Male unknown. Length 3.3 mm.; width 0.68 mm. California 



(Napa and Sonoma Cos.) parallelas Csy. 



Smaller in size, shining, the micro-reticulation scarcely traceable, black in 

 color throughout, the legs and antennae plceous; head well developed, 

 scarcely visibly longer than wide, nearly as in the preceding species in 

 form, the minute but deep punctures rather less close-set; antennae 

 shorter than in parallelus, distinctly shorter than the head and pro- 

 thorax, with joints two to four gradually decreasing in length as usual ; 

 prothorax relatively smaller, much narrower than the head, the punc- 

 tures larger than those of the head as usual but fine, sparse and notably 

 feeble; elytra only just visibly longer than wide, with the sides very 

 feebly diverging from base to apex, about a fifth longer and two-fifths 

 wider than the prothorax, finely, not very densely punctate; abdomen 

 but little narrower than the elytra and much wider than the head; gular 

 sutures nearly as in the preceding. Male unknown. Length 3.0 mm. ; 

 width 0.6 mm. Idaho (Coeur d'Aldne), — Mr. WIckham. 



boreellus n. sp. 



5 — Prothorax subequal in width to the head, rather larger in size than in 



punctatus, nearly black in color and of rather robust form. Fifth ven- 



