Casey — A Revision of the American Paederini. 185 



3.4-3.6 mm.; width 52-0.62 mm. California (Lake and Humboldt 



Cog A lucnlenta Csy. 



Body narrower and more parallel, more slender and rather smaller in size ; 

 head nearly as in luctilenta; prothorax but slightly wider than long, 

 rather distinctly obtrapezoidal in form, the apical angles but little 

 rounded; elytra relatively smaller and narrower than in luculenta, but 

 very slightly wider and one-half longer than the prothorax. Length 

 3.2 mm. ; width 0.5 mm. Nevada (Reno), California (Trucbee), Wash- 

 ington State (Spokane) and Idaho (Coeur d'Alene) ....peregrma n. sp. 



10 — Body relatively rather stout, parallel, black and somewhat shining, the 



elytra, legs and antennae castaueous-tarown; punctures minute and 

 close- set, coarser and more widely separated on the head, the latter 

 well developed, as long as wide, but slightly narrower than the pro- 

 thorax, parallel and straight at the sides as usual, the basal angles nar- 

 rowly rounded; prothorax much wider than long, slightly obtrapezoidal, 

 the angles distinct; elytra well developed, nearly a fourth wider and 

 three-fifths longer than the prothorax. Length 3.3 mm.; width 0.62 

 mm. Nevada (Carson City), — Mr. Wickham conjnxn. sp. 



11 — Sides of the prothorax parallel, broadly and feebly arcuate. Body 



rather slender, parallel, moderately shining, black, the prothorax piceo- 

 castaneous, the elytra still paler, especially so broadly toward tip; head 

 noticeably narrower than the prothorax, rather stroni:ly and closely 

 punctured as usual, fully as long as wide, parallel and straight at the 

 sides; prothorax but very little wider than long, minutely punctate, the 

 angles less rounded than in mobilis; elytra about a fifth wider and 

 three-fourths longer than the prothorax, parallel. Length 3.5 mm.; 



width 0.68 mm. California (middle coast regions) contracta Csy. 



Sides of the prothorax more or less feebly convergent from the apical 

 angles to the base; head as wide as the prothorax or somewhat wider; 



species smallest of the genus, slender 12 



12 — Body black, the pronotum and elytra uniform and pale castaneous- 

 brown, the latter only slightly paler at the extreme tip, the legs and 

 antennae still paler; integuments shining; headas wide as the prothorax 

 or just visibly narrower, as long as wide, shining, the punctures dis- 

 tinctly separated; prothorax almost as long as wide, the angles all well 

 rounded; elytra but little longer than wide, nearly a fourth wider and 

 barely one-half longer than the prothorax; abdomen somewhat wider 

 than the prothorax. Length 3.0 ram.; width 0.6 mm. California 



(Humboldt Co.) to Washington State (Spokane) discolor n. sp. 



Body black, the pronotum piceous, the elytra blackish-piceous, paler at the 

 apices especially toward the sides; surface feebly shining; head large 

 for the present genus, somewhat wider than the prothorax, coarsely 

 and not very densely punctate, fully as wide as long, parallel and 

 straight at the sides ; prothorax small, almost as long as wide, the angles 

 rounded, the sides only just visibly convergent; elytra distinctly longer 

 than wide, fully a fourth wider and three-fifths longer than the pro- 

 thorax, finely but strongly, not very densely punctured. Length 2.75 



mm. ; width 0.55 mm. California (Sta. Clara Co.) tantilla Csy. 



Body pale testaceous throughout, the elytra still paler and more fiavate and 

 the abdomen piceous; surface rather shining; head well developed, 



