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 than the prothorax, coarsely, closely, very unevenly and sub- 
rugosely punctured, generally with feebly sublineate arrangement, 
especially toward base; abdomen parallel, as wide as the elytra, finely, 
rather closely punctulate and feebly shining. Male unknown; female 
with the sixth ventral pale in color and broadly rounded at tip. 
Length 5.8 mm.; width 0.9 mm. Montana (Kalispell),— Mr. Wick- 
DADIs'siiin ca silnca sahece ne csceccigh | beeeh seme bas bud pew ROR PRON Th OR. 
Sides of the prothorax broadly and evenly rounded anteriorly, thence 
distinctly converging and nearly straight to the base......ssceseeeee 3 
38— Body and legs rufo-testaceous in color, the elytra 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; elytrarather 
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 mm.; width 0.8mm. Colorado (Ouray — 7500 feet eleva- 
tion), — Mr. Wickham .........cseeceecceece sees es COlOradense ND. 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, longer 
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 
