Casey — A Revision of the American Paederini. 137 
little longer than wide, much wider than the head in both sexes, the 
sides subparallel and feebly arcuate, the basal angles broadly rounded, 
the punctures fine, feeble, very sparse and inconspicuous; elytra 
parallel, distinctly elongate, about a fourth wider and a fifth longer 
than the prothorax in the male, relatively wider and longer in 
the female, the punctures not very coarse, strongly impressed and 
distinct, not very close-set in distinctly impressed series, confused 
toward tip; abdomen rather wide, but little narrower than the elytra, 
densely punctulate. Male with the fifth ventral unmodified, the sixth 
narrowly glabrous and subimpressed along the middle, the apex with a 
triangular emargination about as deep as wide, gradually formed, 
about a third as wide as the segmental apex, with its angle acute and 
not obviously rounded; lobes of the apex strongly, evenly rounded; 
female more abundant than the male, nearly similar but with a rela- 
tively smaller prothorax. Length 5.0-5.8 mm.; width 0.85-0.92 mm. 
Massachusetts, Rhode Island, New York, Pennsylvania, Indiana and 
POWs eee a AGREE 0 FA o bid eid alae dds C00 s9.es s SOOLIERID ET, 
Antennae rather stout, distinctly incrassate distally, nearly half as long as 
the body, with the medial joints about three-fourths longer than wide 
in the male; coloration as in fallax; head fully as long as wide, 
rather coarsely, very sparsely punctate, nearly as in collaris but with 
the basal angles less broadly rounded; prothorax as in collaris but 
shorter, only very slightly longer than wide, the sides distinctly 
arcuate, similarly finely and sparsely punctate; elytra distinctly elon- 
gate, the sides subparallel, a third wider and longer than the prothorax, 
the punctures smaller, feebler and less close-set than in collaris but 
similarly arranged, the series much less impressed; abdomen narrower, 
distinctly narrower than the elytra, densely dull and punctulate as 
usual, Male with the fifth ventral unmodified as usual, the sixth nar- 
rowly glabrous along the middle only in posterior half or slightly more, 
not distinctly impressed, the apex with a very small triangular notch 
about as deep as wide, only about a fifth as wide as the apex, the angle 
of the notch not distinctly rounded, the lobes of the segmental apex 
rounded, the notch apparently somewhat asymmetric, the right side — 
proceeding from the segmental base — being more divergent than the 
left; female unknown. Length 5.3 mm.; width 0.85 mm. North 
Dakota (Devil’s Lake).......ceeceee cece vececeercesee sss VALANS 1. SD, 
Antennae thick but filiform, not appreciably incrassate distally, only very 
slightly longer than the head and prothorax in the female, the medial 
joints nearly as in vagans; coloration as in that species; head small, 
nearly as in vagans throughout; prothorax rather large, distinctly 
wider than the head and longer than wide, the sides parallel, broadly 
arcuate, more rounded posieriorly and narrowed toward base as usual, 
the punctures small but deep and distinct, sparse; elytra much elon- 
gated, the sides subparallel, two-fifths wider and longer than the pro- 
thorax, the punctures very fine and feeble, inconspicuous, widely set in 
unimpressed series, confused toward tip; abdomen parallel, densely 
dull, much narrower thanthe elytra. Male unknown. Length5.7mm.; 
width 0.9mm. Nevada (Elko),— Mr. Wickham........-habilis n. sp. 
7 — Male sexual characters of the collaris type, a small triangular notch at 
