Casey — A Revision of the American Paederini. 121 



moderately broadly rounded, the basal very small, the punctures rather 

 fine but deep, unevenly disposed, dense internally, the median line not 

 elevated; elytra much elongated, subparallel, a fourth wider and a fifth 

 longer tban the prothorax, coarsely, closely, very unevenly and sub- 

 rugosely punctured, generally with feebly sublineale arrangement, 

 especially toward base; abdomen parallel, as wide as the elytra, finely, 

 rather closely punctulate and feebly shining. Male unknown; feranle 

 with the sixth ventral pale in color and broadly rounded at tip. 

 Length 5.8 mm.; width 0.9 mm. Montana (Kalispell), — Mr. Wick- 

 ham montanicnm n. sp. 



Sides of the prothorax broadly and evenly rounded anteriorly, thence 

 distinctly converging and nearly straight to the base .... 3 



3 — Body and legs rufo-testaceous in color, the elytia faintly darker in basal 

 half, the abdomen piceous-black, the antennae dusky; head slightly 

 elongate, the sides parallel and feebly arcuate; base truncate, the 

 angles moderately rounded, the punctures fine but strong, close-set, 

 nearly wanting at the middle of the vertex; antennae rather thick, much 

 longer than the head and prothorax, distinctly incrassate distally; 

 prothorax small, much narrower than the head, fully a third longer 

 than wide, not very coarsely but deeply and closely punctate, the 

 median smooth line well defined and somewhat elevated ; elytra rather 

 small, slightly elongate, subparallel and feebly arcuate at the sides, 

 about, equal in length to the prothorax in both sexes and a third or 

 fourth wider, coarsely, closely, unevenly and subrugosely punctate; 

 abdomen as wide as the elytra, finely but rather strongly, moderately 

 closely punctulate and somewhat shining. Male with ventrals two to 

 four wholly unmodified, the fifth narrowly and just visibly flattened 

 along the middle, the apex broadly sinuato-truncate; sixth with a 

 feeble parallel and slightly oval impression, a third as wide as the seg- 

 ment and extending throughout the length, the bottom densely covered 

 with short black spiculiform hairs which are slightly parted along the 

 middle, the apex with a small abruptly formed, circularly rounded 

 sinus, a third as wide as the apex and nearly twice as wide as deep; 

 female with the sixth ventral more convex, broadly rounded at tip. 

 Length 5.5-6.0 ram. ; width 0.8 mm. Colorado (Ouray — 7500 feet eleva- 

 tion), — Mr. Wickham coloradeiise n. sp. 



Body dark rufo-piceous in color, the elytra bright rufous in apical half, the 

 abdomen black; legs and antennae rather pale, rufous; head not quite 

 as wide as the elytra in the female, with the antennae stout, Ioniser 

 than the head and prothorax and evidently incrassate distally; sides 

 parallel and feebly arcuate, the base subtruncate, the angles broadly 

 rounded; eyes at two and one-half times their own length from the 

 base; punctures rather small, deep and close-set, sparse on the vertex; 

 prothorax small, much narrower than the head, nearly a third longer 

 than wide, less finely but deeply and densely punctate, especially toward 

 the smooth median line, which appears to be slightly elevated; elytra 

 but slightly longer than wide, the sides parallel and feebly arcuate, 

 two- fifths wider than the prothorax but only very slightly longer, the 

 punctures only moderately coarse and not very close -set but uneven, 

 subrugose and much confused; abdomen not quite as wide as the 



