Casey — A Revision of the American Paederini. 81 
Antennae extremely stout, attenuated toward tip, the middle joints never 
longer than wide, rounded at the sides and strongly constricted at 
base; body generally larger and stouter, the legs rather stout....... 2 
Antennae stout, with the joints not distinctly longer than wide, but 
obconic in form, the legs moderately Stout... ...ceseesecessccceseee 9 
Antennae stout to moderately slender, generally rather shorter than the 
head and prothorax, the joints distinctly elongate and obconic; legs 
relatively rather slender to stout im fOrM...... cee sere cesecerccsseseld 
2 — Elytra bicolored, black basally and red apically.......0.ccsecssseseee 8 
Mlytra unicolorous, DICK i6.6¥ 5ne ssc aadnvin seus eee hed wh au ceestavemateee: 6 
3— Elytra distinctly longer and wider than the prothorax in both sexes, 
black, shining, the elytra bright rufous, becoming black in basal two - 
fifths; legs dark rufous, the antennae piceo-testaceous; head distinctly 
wider than the prothorax in both sexes, nearly as wide as the elytra 
in the male, evidently narrower in the female; eyes at between two and 
three times their length from the base, the angles well rounded; width 
a little before the angles slightly greater than at the eyes; neck three- 
fifths as wide as the head; gular sutures rather narrowly separated, 
feebly converging to the base; prothorax about a fourth longer than 
wide, the angles all obviously rounded; the sides very feebly converging 
aud nearly straight; punctures like those of the head, rather coarse, 
deep, irregular in arrangement and moderately sparse, broadly sparse 
toward the middle of the head, the median smooth thoracic line not 
defined by punctured series; elytra large, parallel, slightly longer than 
wide, the punctures coarse, deep, moderately sparse and arranged in 
very irregular series; abdomen parallel, slightly narrower than the 
elytra, finely and only moderately closely punctulate; legs moderately 
stout. Male with the fourth and fifth ventrals narrowly and very feebly 
impressed along the median line, the sixth also similarly impressed 
along the middle toward base but very narrowly swollen toward apex, 
the latter rectilinearly truncate, with a very small median sinus wider 
than deep, the edges of which are callous and polished; surface of the 
sixth segment more finely and sparsely punctulate and pubescent, 
except the lateral slopes of the apical tumidity, which are clothed with 
stiff black hairs; sixth segment of the female rather narrowly lobed 
at tip. Length 10.0 mm.; width 1. mm. New York (Hudson 
Valley) eeeesecccecereccvcecceesesccevccecosessvecceses seo MMplipenne 
Elytra equal or subequal in length to the prothorax.......sscescseseeeees 4 
Elytra distinctly shorter than the prothorax,......ssesececevccesecesees & 
4 — Elytral punctures rather small, feebler and sparser and arranged in rather 
well defined series; body stout, parallel, shining, black,{the elytra, 
— gradually and nubilously toward apex— and the legs throughout, 
rufous; antennae rufo-piceous; head large, only very slightly wider near 
the base than at the eyes, the latter moderate; angles not very broadly 
rounded; neck three-fifths as wide as the head, the punctures moderately 
coarse, deep and sparse toward the sides, very remotely scattered 
elsewhere; prothorax unusually large, scarcely visibly narrower than 
the head, about a fifth longer than wide, the sides very feebly converg- 
ing posteriorly throughout and nearly straight, the angles narrowly 
rounded at apex, broadly at base; punctures coarse but:not very deep, 
