Casey — A Revision of the American Paederini. 103 
sparsely, not very coarsely punctate; in the female quadrate, distinctly 
wider than the prothorax though much shorter; abdomen nearly as 
wide as the elytra, minutely and more closely punctured than usual. 
Male with the fifth ventral rather narrowly and feebly impressed along 
the middle, the impression beginning near the base and extending, 
slightly broadening, to the apex, the latter rectilinearly truncate; sixth 
ventral with a large oval shallow and clearly limited impression, clothed 
with sparse spiculiform hairs and extending from near the base to the 
apex, where there is a small emargination, slightly wider than deep, 
narrower than the impression — which is a third as wide as the seg- 
ment — and enclosed between very short projecting processes. Length 
5.5mm.; width 0.82 mm. Massachusetts (Lowell), —Mr. F. Blanch- 
ALA cee sece cece ccccceccccce seseccescsscscecs rece cess SCOlOPACea 1. SD. 
Body nearly similar to the preceding but a little larger and more slender, 
pale brownish-testaceous throughout, the abdomen blackish except 
toward tip; antennae dusky; head suboval, slightly wider than the 
elytra in the male, equal thereto in the female, very feebly enlarged 
toward base in the male, parallel in the female, the sides very feebly 
arcuate; basal angles less rounded thanin scolopacea; antennae nearly 
similar;/ punctures rather sparser; prothorax narrower and more 
elongate, distinctly narrower than the head in both sexes, less strongly 
punctured; elytra similar in the sexes, barely as long as wide, with the 
sides obviously diverging, very stightly wider and much shorter than 
the prothorax, feebly and sparsely punctate; abdomen subparallel, a 
little narrower than the elytra, minutely, not very closely punctulate. 
Male with the fifth ventral broadly, feebly impressed in more than 
median fourth from a little before the middle to the apex, the latter 
truncate; sixth with a shallow oval impression and apical emargination 
nearly as in scolopacea. Length 5.8 mm.; width, 0.78 mm. Lake 
SUPCTIO‘. cece cece cece ces neve eccees cece ce vecces sesesceces sINODS Cay. 
It will be observed that the secondary sexual characters of 
the male remain virtually constant in type throughout and 
constitute as valid a generic character as any other structural 
modification. These characters are modified to some extent, 
as a matter of course, giving such forms as described under 
othioides, nigrolinea and scolopacea. The form of the modi- 
fication of the sixth ventral in the nigrolinea group, reminds 
us of the form assumed in certain Scopaei, notably Scopaeoma, 
Inops was united with othioides some years ago, as asynonym 
of that species, but there is no close resemblance between 
them. i‘ | 
Lathrolepta n. gen. 
This genus is well distinguished from any of the preceding 
by the form of the gular sutures, the narrow, deep, acutely 
