Casey — A Revision of the American Paederini. 87 
Form very stout, shining, black throughout, the legs and antennae dull 
rufous; head and elytra rather finely, very sparsely punctate, the pro- 
notum hardly more coarsely and also very sparsely, the abdomen 
minutely and densely punctulate; head small, longer than wide, the 
sides parallel and feebly arcuate, the angles broadly rounded; antennae 
thick, the strongly obconic medial joints one-half longer than wide; 
gular sutures moderately separated and feebly converging to the base; 
prothorax broad, much wider than the head, slightly longer than wide» 
the sides very nearly parallel, the angles rather rounded; elytra large, 
distinctly wider and a little longer than the prothorax, slightly longer 
than wide, subparallel, the sides feebly arcuate, the surface rather 
broadly impressed at each side of the suture; abdomen not quite as 
wide as the elytra. Male with a distinct parallel impression in about 
middle sixth of the fifth ventral, the sixth with a narrower, deeper and 
more anteriorly attenuated impression, the apex having a triangular 
emargination aboutas deep as wide, occupying the posterior part 
of the impression, the edges of the notch thin, pale and membranous 
at the bottom; female unknown. Length 7.3 mm.; width 1.4 mm. 
Manitoba (Winnipeg) .....csceccecceceesecccesceese Sparsellum 0. sp. 
17 — Elytra not wider than the prothorax and very much shorter, the form of 
the body more elongate and parallel..........e+.5..- Vide annie cae Weledaehe 
Elytra slightly wider than the prothorax and only a little shorter; body 
stouter and less paralle] ...cecscccccccvcceceencevvccescerscs sceere - 19 
18 — Elytra depressed, scarcely as long as wide, with the sides diverging 
from the base; body black, shining; punctures ofthe head and elytra 
rather small, sparse, those of the pronotum much coarser, only moder- 
ately sparse, of the abdomen minute and very dense, the surface dull in 
lustre; head moderate in size, the eyes at nearly three times their own 
length from the base; angles broadly rounded, the sides parallel and 
more or less arcuate; antennae stout, with the strongly obconic joints 
one-half longer than wide; prothorax large, a little wider than the head, 
oblong, with the sides parallel and very slightly arcuate; elytra small, 
barely as long as wide, depressed, the sides nearly straight and very 
feebly diverging from the base; abdomen fully as wide as the base of the 
elytra. Male with the fifth ventral impressed in less than median third» 
the impression wider than long, rounded anteriorly, not quite attaining 
the base, the apex with a rounded shallow sinus bounding the im- 
pression; sixth ventral with a narrower longitudinal impression, 
the apex with a large, evenly rounded sinus, slightly wider than 
deep and equal in width to the impression, the edges of the sinus nar- 
rowly glabrous at the bottom, the impression clothed with short, very 
stout spiculiform hairs. Length 8.0 mm.; width1.l1mm. New Hamp- 
Shire (White Mts.) ....cccccccsccccccccccesccccce es WaShingtoni n. sp. 
Elytra normally convex, parallel, exactly quadrate; body polished, black 
throughout, the legs bright, and the antennae dusky, rufous; 
head moderate, the sides feebly arcuate, the angles broadly rounded; 
antennae stout as in washingtoni; prothorax large, slightly wider than 
the head, only slightly elongate, somewhat narrowed from apex to base, 
the punctures much coarser than those of the head and elytra, which are 
rather small, sparse; elytra equal in width to the prothorax and 
