Casey — A Revision of the American Paederini. 125 
prothorax, rather stout, feebly incrassate distally, the medial joints some- 
what more than twice as long as wide and distinctly longer than the sub- 
apical; prothorax rather distinctly wider than the head, but little longer 
than wide, obtrapezoidal, the sides strongly converging and straight, 
the punctures small, very sparse and unevenly disposed, subserial along 
the smooth line; elytra slightly elongate, large, parallel, a fourth wider 
and longer than the prothorax, the punctures fine, very feeble, arranged 
in wholly unimpressed and somewhat regular series, except toward 
apex; abdomen distinctly narrower than the elytra, finely, closely punc- 
tulate. Male with the fifth and sixth ventrals wholly unmodified on the 
surface, the former scarcely visibly sinuato-truncate toward the middle 
at apex, the latter with a gradually formed sinus, slightly wider than 
deep, one-third as wide as the apex, the emargination broadly rounded 
at the bottom, with its sides at first feebly diverging posteriorly. 
Length 8.0 mm.; width 1.28 mm. Arizona (Winslow),—Mr. Wickham. 
aang n. Sp. 
Abdomen Tufous at tip. so. cic cscs cccdcvcscccsssscccencs de Vedeeusaee 
8 — Antennae shorter, the metiial joints but slightly disnehied: Body small 
and unusually slender, parallel, rufous in color, the head and abdo- 
men — except toward tip —black, the legs and antennae pale testaceous; 
head rather longer than wide, coarsely, very sparsely punctate, the 
sides nearly straight and just visibly converging from the eyes to the 
broadly rounded basal angles; eyes well developed, at about one-half 
more than their own length from the base; antennae moderately thick, 
scarcely as long as the head and prothorax, but slightly incrassate dis- 
tally, the medial joints scarcely one-half longer than wide, longer than 
the subapical; prothorax only very slightly longer than wide, just vis- 
ibly wider than the head, the sides parallel and very feebly arcuate, the 
basal angles broadly rounded, the apical not at all rounded; punctures 
coarse and irregular along the smooth median line, small and very 
sparse elsewhere; elytra slightly elongate, parallel, a fifth wider and a 
fourth longer than the prothorax, the punctures coarse, arranged in 
regular and broadly impressed series; abdomen decidedly narrower 
than the elytra, minutely and rather sparsely punctulate. Male un- 
known; female with the sixth ventral narrow, evenly rounded at tip. 
Length 6.4mm.; width 0.95 mm. New Mexico (Albuquerque). 
angusta n. sp. 
Antennae more elongate, longer than the head and prothorax, very feebly 
incrassate meee with the medial joints almost twice as long as 
WIAD icvicnetwaed:« Jes dedupecereeuehes seus eveb see sweesdb btdhudecec® 
9— Form soniewhutk suk, rather dark rufo-testaceous throughout, the 
head piceous-black, the abdomen — except toward tip — black; head 
fully as long as wide, coarsely, very sparsely punctate, subimpunctate 
toward the middle as usual, the sides straight and parallel, the angles 
well rounded; eyes at three-fourths more than their own length from 
the base; prothorax distinctly wider than the head, but little longer than 
wide, the sides parallel and nearly straight, rounding toward base, the 
punctures rather coarse and very sparse throughout but serial and 
close-set along the median smooth space; elytra but slightly longer 
than wide, parallel, a fifth wider and a fourth longer than the pro- 
