Casey — A Revision of the American Paederini. 109 



Antennae in the male less elongate, about equally slender, the medial joints 

 not quite twice as long as wide. Body less stout, black, the elytra 

 slightly piceous, the pale spot at the outer angles broader and rather 

 less abruptly defined; legs very pale, the antennae fuscous; head nearly 

 as in the preceding species but smaller and narrower, less finely punc- 

 tate and more evenly semicircular at the base; antennae scarcely 

 longer than the head and prothorax, the latter narrower and more dis- 

 tinctly elongate, much wider than the head, the sides parallel and 

 distinctly arcuate, the punctures equally strong and coarse and rather 

 less sparse; elytra slightly elongate, parallel, similarly, though less 

 sparsely, punctate, two-fifths wider and a fourth longer than the protho- 

 rax ; abdomen but little narrower than the elytra. Male with the second 

 and third ventrals unmodified, the fourth very feebly impressed toward 

 apex only, the fifth equally feebly impressed throughout the length, the 

 apes feebly sinuate at the middle, the sixth with a very narrow and 

 acutely angulate notch, much deeper than wide, not more than a twelfth 

 as wide as the apex, the latter inwardly and anteriorly oblique and 

 truncate at each side of the notch and not transverse as in angularis, the 

 surface as in that species; female nearly similar to the male, except that 

 the sides of the head are obviously converging behind the eyes. Length 

 6.4 mm.; width 1.15 mm. Massachusetts (locality unknown). 



fnrvnlns n. sp. 



12 — Median smooth line of the pronotum normally wide and distinct. 



Body rather small in size and of less stout form, deep black, the pro- 

 thorax and elytra with a scarcely discernible piceous tinge, the outer 

 angles of the latter pale; head rather finely and sparsely punctate, the 

 eyes rather smaller and more prominent than in the two following, the 

 sides behind them strongly converging and nearly straight, then broadly, 

 circularly rounded at the base; prothorax oblong, parallel, rather 

 distinctly elongate, with the sides broadly arcuate, only very slightly 

 wider than the head, the punctures notably coarse, deep and moder 

 ately sparse; elytra slightly elongate, parallel, a third wider and a fifth 

 longer than the prothorax, less coarsely but rather strongly and about 

 equally sparsely punctate, somewhat rugose by oblique reflection as 

 usual; abdomen as wide as the elytra. Male not known; female with 

 the sixth ventral briefly lobed, the lobe arcuately truncate at tip ; surface 

 not at all impressed. Length 6.0 mm.; width 1.0 mm, Pennsylvania 



(near Philadelphia) iiigrescens n. sp. 



Median smooth line of the pronotum narrow and generally subeffaced; 

 species larger and stouter, black, sometimes with a feebly piceous 

 tinge 13 



13 — Body moderately stout, the pale spot at the outer elytral angles large; 



head narrow, longer than wide, minutely, rather closely punctate 

 laterally, subimpunctate toward the middle, the sides behind the eyes 

 rapidly converging and nearly straight almost to the base, which is 

 arcuately subtruncate; antennae slender, much longer than the head and 

 prothorax, the medial joints more than twice as long as wide in the 

 male; prothorax moderately broad, distinctly wider than the head and 

 longer than wide, the sides parallel and broadly arcuate, the punctures 

 rather coarse, deep and close-set, gradually becoming fine and sparse 



