Casey — A Revision of the American Paederini. 221 



the sides feebly converging and broadly rounded thence to the base and 

 rapidly so and subsinuate thence to the narrow apex, the punctures 

 similar to those of the head but less confluent; elytra quadrate, par- 

 allel, a third wider and one-fourth longer than the prothorax, equal in 

 width to the head, closely and asperately punctate; abdomen parallel 

 with very feebly arcuate sides, distinctly narrower than the elytra, 

 minutely, closely punctate; hind tarsi rather shorter than usual. 

 Male with a broadly rounded abrupt emargination occupying median 

 third of the apex of the fifth ventral, from the bottom of which pro- 

 jects a narrow slender aciculate process extending beyond the limits of 

 the sides of the emargination; sixth segment with a triangular notch 

 having straight sides and acute apex, somewhat deeper than wide and 

 about one-third as wide as the segment; segmental surfaces unim- 

 pressed. Length 3.9 mm.; width 0.78 mm. District of Columbia. 



opacalns Lee. 

 Sculpture coarse, the elytra always more or less sparsely punctate 3 



3 — Head broadly subtruncate at base, the eyes very large, the antennae 



short and thicker; pronotum with a smooth median line ; elytra large, 

 wider than the head; punctures of the head very dense but not coales- 



cent ; body less elongate 4 



Head rounded or subangulate at base, more elongate, the eyes moderate in 

 size, the antennae longer and more slender; pronotum without a smooth 

 median line; elytra smaller, never wider than the head; punctures of 

 the head longitudinally confluent 5 



4 — Body stout, parallel, moderately convex, deep black in color throughout 



except the elytral apex, which is pale flavo -testaceous and similar in 

 color to the femora and tarsi, the knees and tibiae piceous, the anten- 

 nae dusky testaceous; lustre dull, the elytra and broad median line of 

 the pronotum polished ; head as wide as long, coarsely and very densely 

 punctate above and beneath, the eyes very large, broadly convex and 

 not very prominent, almost continuing the outline of the tempora 

 behind them and situated at about two-thirds of their own length from 

 the base; tempora evenly rounded from the eyes to the neck, the base 

 broadly, very feebly arcuate or subtruncate; prothorax slightly elon- 

 gate, two-thirds as wide as the head, punctured like the latter except 

 along the impunctate median line, broadly angulate at apical third, the 

 sides thence just visibly converging and straight to basal fourth, then 

 more convergent and subsinuate to the broad base, strongly converging 

 and broadly subsinuate anteriorly to the narrow neck; elytra large, 

 parallel, scarcely as long as wide, three-flfths wider and one-third 

 longer than the prothorax, convex, strongly impressed throughout at 

 each side of the suture, the punctures fine, sparse and scarcely at all 

 asperate; abdomen parallel, narrower than the elytra but subequal in 

 width to the head, the sides feebly arcuate, minutely, closely punctate; 

 legs slender. Male unknown. Length 4.3 mm.; width 0.95 mm. 



Oregon (Albany) , — Mr. Wickham oregonns n. sp. 



Body similar in form, coloration and sculpture to the preceding but smaller 

 in size, with the eyes more convex and prominent, the tempora behind 

 them less converging to the broadly rounded basal angles, the feebly 

 converging straight sides of the prothorax behind the obtuse anterior 



