Casey — A Revision of the American Paederini. 101 
ferruginous; antennae dusky; head oblong, slightly elongate, the sides 
very feebly arcuate; angles moderately broadly rounded; neck much 
more than half as wide, the punctures moderately coarse and sparse; 
antennae moderately stout, not enlarged distally, not as long as the 
head and prothorax, the outer joints nearly as long as wide; prothorax 
nearly a fourth longer than wide, rather narrow, much narrower than 
the head, subparallel, the punctures coarse and not very sparse; elytra 
slightly wider than the prothorax and but little shorter, not quite as 
wide as the head, slightly longer than wide, the sides very feebly diverg- 
ing, the punctures rather small and sparse but distinct, subserial; 
abdomen at base as wide as the elytra, a little wider at the apex of the 
fourth segment, shining, minutely and not densely punctate, Male with 
the fifth ventral feebly impressed in the middle toward tip, the apex 
transverse and unmodified, the sixth with a deep, slightly diverging 
excavation in rather more than median fourth, beginning near the base, 
the bottom polished and rapidly declivous to the emargination, whichis 
somewhat wider than deep, the lateral projections, partially forming the 
latter, obtuse and bearing each a small fringe of spiculiform hairs; 
female with the elytra fully as long as the prothorax and distinctly 
wider, the sixth ventral obtusely rounded. Length 4 8-5.8 mm.; width 
0.78mm. Massachusetts (Lowell), Rhode Island (Boston Neck), New 
Jersey And TOWA.....scecceecccccerccccccsccscesercoess Othioides Lec. 
8—Elytra only slightly shorter than the prothorax; body deep shining 
Pimek 1 COOK TTOUBNORE so ssid cbs dc icc sie N i eeces eee tedcswban cscs § 
Elytra very much shorter than the prothorax in both sexes; body black- 
ish-piceous to paler in color when mature.......eeeee-. wee seeeese Il 
9 — Processes of the sixth ventral in the male diverging posteriorly. Body 
very slender, parallel, the tip of the abdomen feebly rufescent; legs 
rather bright rufous, the antennae somewhat dusky; head rather longer 
than wide and distinctly wider than the elytra, only slightly broader 
toward base, the sides feebly arcuate, the angles broadly rounded; 
punctures moderately coarse and sparse; eyes notably small, the an- 
tennae thick, slightly enlarged distally; prothorax much elongated, 
parallel, distinctly narrower than the head, fully a fourth longer than 
wide, the punctures somewhat coarse, uneven in distribution, rather 
more densely aggregated along the median smooth line; elytra in the male 
but little longer than wide, just visibly wider than the prothorax and 
about four-fifths as long, in the female distinctly wider than the prothorax, 
very nearly as long and fully as wideasthe head; punctures moderately 
fine and sparse but distinct and scarcely lineate; abdomen parallel, not 
quite as wide as the elytra, shining, the fine sculpture not dense. Male 
with the fifth ventral feebly impressed in the middle in apical half, the 
apex transverse, the sixth with the usual narrow deep excavation not 
extending to the base, more broadly expanding posteriorly than in the 
preceding species, the processes more angulate and separated at tip by 
nearly half the width of the segment, the emargination much wider than 
deep, the bottom evenly rounded; declivous floor of the excavation 
broadly thinner and translucent posteriorly. Length 5.0 mm.; width 
0.7mm. Rhode Island (Boston Neck).........seee0++e++-tenuis Lec. 
