Casey — A Revision of the American Paederini. 83 



the head, not more than a sixth longer than wide, the sides not distinctly 

 converging and very feebly arcuate, the angles rounded as usual; elytra 

 large, rather longer than wide, somewhat longer and wider than the 

 prothorax, parallel; abdomen parallel, slightly narrower than the elytra; 

 legs rather long and only moderately stout. Male with the fifth ventral 

 entirely unmodified, the sixth narrowly and very feebly impressed in the 

 middle in nearly basal two-thirds, thence longitudinally and obtusely 

 tumid along the median line to the apex, which is truncate, with a very 

 minute, simple and shallow median sinus, five or six times as wide as 

 deep; female slightly more slender than the male. Length 9.5mm.; 

 width 1.5 mm. New York (Hudson Valley) deceptivum n. sp. 



Smaller species, the legs and antennae dark piceo-rufous, the surface 

 shining, tbe head and pronotum coarsely deeply and moderately sparsely 

 punctate, the punctures sparser toward the middle of the head, with the 

 smooth line of the pronotum as usual, those of the elytra slightly smaller 

 and rather sparser, not very definitely lineate, of the abdomen minute 

 and very close- set; head well developed, a little wider than the elytra 

 in the male, subequal to the latter in the female, wider near the base 

 than at the eyes, the angles moderately rounded; gular sutures less 

 approximate; prothorax rather small, distinctly longer than wide and 

 much narrower than the head, the angles somewhat distinct, the sides 

 feebly converging and nearly straight; elytra nearly a fourth longer 

 than wide, much wider and longer than the prothorax, parallel and 

 nearly straight at the sides; abdomen somewhat narrower than the 

 elytra, parallel Male with the fifth ventral scarcely visibly flattened 

 along the median line, the sixth rather widely but very feebly im- 

 pressed throughout in continuation, the apex with a very broad shallow 

 sinus in almost median half and fully four times as wide as deep, the 

 bottom of the sinus transverse and with two very feeble rounded lobes, 

 having an intermediate minute and very feeble sinus; female with the 

 sixth ventral very broadly, obtusely lobed at apex. Length 7.0 mm.; 

 width 1.15 mm. Massachusetts, — Mr. F. Blanchard — and Michigan 

 (Detroit) spissicorne n. sp. 



8 — Form very stout, parallel, the elytra scarcely as long as wide; legs 

 rather short and very stout ; head large, equal in width to the elytra 

 and very slightly wider than the prothorax, formed as usual, the coarse 

 punctures very remote except toward the sides; prothorax as usual, 

 large, only slightly longer than wide, the punctures coarse, deep and 

 sparse, the sides feebly converging; elytra a little shorter and slightly 

 wider than the prothorax, coarsely and rather confusedly punctate ; abdo- 

 men very broad, as wide as the elytra, parallel, finely, rather densely 

 punctulate. Male with the fifth ventral wholly unmodified, the sixth with 

 a narrow and very feeble impression on the median line in more than basal 

 half, the surface very broadly and just visibly swollen thence to the 

 rectilinearly truncate and wholly unmodified apex, the pubescence a little 

 denser at each side of the swelling; female slightly narrower than the 

 male, with the sixth segment feebly and broadly lobed at tip. Length 

 9.0 mm. ; width 1.5 mm. Massachusetts, — Mr. F. Blanchard, New York 

 (Long Island) and New Jersey (Orange) nigroliieens n. sp. 



Form narrower and more elongate, the elytra fully as long as the prothorax, 



