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 enlarticd 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 emarginatiou, which is 

 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 dist'nctly 

 wider, the sixth ventral obtusely rounded. Length 4 8-5.8 mm.; width 

 0.78 mm. Massachusetts (Lowell), Rhode Island (Boston Neck), New 



Jersey and Iowa othioides Lee. 



8— Elytra only slightly shorter than the prothorax; body deep shining 



black in color throughout 9 



Elytra very much shorter than the prothorax in both sexes; b:)dyblack- 



ish-piceous to paler in color when mature U 



9 — Processes of the sixth ventral in the male diverging posteriorly. Body 

 very slender, parallel, the tip of the abdomen feebly rufesceut; 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 wide as the 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 emarginatiou much wider than 

 deep, the bottom evenly rounded; declivous floor of the excavation 

 broadly thinner and translucent posteriorly. Length 5.0 mm.: width 

 0.7 mm. Rhode Island (Boston Neck) tenuis Lee. 



