Casey — A Revision of the American Paederini. 179 



acters as stated in the table. Since then another member of 

 the genus has occurred, and a specimen was kindly sent tome 

 by Mr. Wickham as having been collected in eastern Nevada. 

 The two species may be identified as follows : — 



Stout, depressed, the sides slightly arcuate in general form, pale brownish- 

 testaceous throughout, the head and abdomen rather darker; head and 

 prothorax smooth, shining and subimpunctate, becoming finely punctu- 

 late and subscabrous broadly toward the sides, the elytra evenly, 

 closely, minutely and asperately punctate; head much wider than long, 

 somewhat transversely oval in form, the sides being parallel and broadly 

 arcuate, the angles broadly rounded and the base transversely arcuate, 

 the eyes moderately well developed, the sides and frontal regions 

 bristling with a few black setae ; antennae slender, as long as the head 

 and prothorax in the male, shorter in the female ; prothorax three-fifths 

 wider than long, the sides just visibly converging from the very broadly 

 rounded apical angles to the more obtuse but less rounded basal angles 

 and nearly straight, distinctly wider than the head, the rounded contour 

 of the apical angles having three or four long black bristling setae and 

 the basal angles marked by another similar bristle; elytra much wider 

 than long, slightly wider than the prothorax and about one-half 

 longer, the sides strongly diverging and broadly arcuate from the 

 rounded and scarcely at all exposed basal angles; apical margin con- 

 jointly broadly and angularly sinuate, the side margins without trace of 

 bristling setae ; abdomen short and broad, as wide as the elytra, the 

 segments short and broad with the side margins rather thick, having 

 numerous long bristling setae toward tip. Length 4.0 mm.; width 

 1.0 mm. Northern Illinois, Iowa (Iowa City) and Nebraska (West 

 Point) laticolle Csy . 



Stout but more parallel, moderately depressed, pale red-brown throughout, 

 the head and abdomen somewhat more piceous ; elytra and prothorax 

 alutaceous, finely but strongly, extremely densely and evenly punctate 

 throughout, the latter with only vestiges of a narrow smooth median 

 line, the head more shining, more coarsely, deeply and less closely 

 punctured but evenly so throughout, except a narrow smooth median 

 line, the abdomen finely, densely punctulate as usual; head but little 

 wider than long, the sides much longer than in laticolle and nearly 

 straight, the angles less broadly rounded and the base moderately arcu- 

 ate; antennae longer and relatively stouter, as long as the head and pro- 

 thorax even In the female; prothorax only just visibly wider than the 

 head, about a third wider than long, the sides subparallel and feebly 

 arcuate, the apical angles right and scarcely or only very narrowly 

 rounded, the basal more broadly so, the bristling setae subobsolete; 

 elytra about as long as wide, slightly wider than the prothorax and 

 three-fifths longer, the sides diverging from the base and nearly 

 straight, the apex only feebly sinuate; abdominal setae toward tip 

 short, Male unknown. Length 4.6 mm.; width 0.9 mm. Nevada 

 (Elko) neradicnm n. sp. 



