Casey — A Revision of the American Paederint. 195 
punctate, the pronotum and elytra more coarsely but sparsely so, the 
abdomen very minutely, densely punctulate. Head moderate, rather 
longer than wide, the sides parallel for about a length of the eye be- 
hind the latter, then gradually rounded and converging to the sinuato- 
truncate base, which is only about three-fourths of the width at the 
somewhat well developed eyes; basal angles obtuse but only moderately 
rounded; antennae alittle shorter than the head and prothorax, mod- 
erately thick, very feebly and gradually incrassate distally, the basal 
joint but little longer than the next two combined; prothorax large, 
oval, a third longer than wide, parallel and broadly arcuate at the sides, 
the latter arcuately converging anteriorly to the neck, relatively larger 
and almost as wide as the head in the male, distinctly narrower in the 
female; elytra slightly wider than the head anda fifth wider than the 
prothorax, slightly elongate, more obviously so in the female, equal in 
length to the prothorax in the latter and slightly shorter in the male; 
abdomen subequal in width to the elytra. Male having all the 
abdominal segments sparsely clothed with longer stiff bristles at each 
side of the broadly flattened median third, the bristles inclined in- 
wardly, the second segment impressed in median third almost to the 
base, the impression smooth and polished posteriorly and more thickly 
bristling with stiff hairs elsewhere, its side margins rather tumid and 
prominent at and behind the middle and having a dense tuft of hairs at 
the middle anteriorly; third segment very feebly impressed basally; 
fifth with a narrow and very feeble median sinus; sixth having a large 
simple sinus at the middle of the apex, about three times as wide as 
deep, the surface in the middle feebly, longitudinally and narrowly 
impressed; femora all thick, the posterior broadly concave on the post- 
erior face, the lower edge of the concavity feebly serrate — as is also 
the inner edge of the hind tibiae — and having a large tooth near the tro- 
chanter; anterior tarsi rather strongly dilated. Length 3.2 mm.; width 
0.65 mm. Massachusefts.......sesccscesecsccces +-++-+-dentiger Lec. 
Form slightly more slender than in dentiger but nearly similar in size, form 
and sculpture; hind angles of the head less broadly rounded; prothorax 
distinctly narrower than the elytra, the latter comparatively more elon-~ 
gate thanin dentiger; legs brown in color. Malecharacters substantially 
similar, exeepting that the emargination of the sixth ventral is a little 
less broadly rounded, the inner sinuate margin of the hind femora 
slightly more serrate and the hind tibiae not serrate internally. Cali- 
fornia (POMONA) ...+sececessceercecccceccoscecvcscesees ArMiger Fall 
Form stouter and less convex than in dentiger, not parallel, shining, black, 
the legs and antennae piceous throughout; head dull in lustre, slightly 
elongate, the sides parallel for a short distaece behind the eyes, then 
broadly rounded intothe base, the angles being much more broadly 
rounded at base than in dentiger; antennae slender, feebly incrassate; 
prothorax slightly though distinctly narrower than the head, parallel 
and broadly arcuate laterally, elongate-oval, more coarsely punctured 
than the elytra, the punctures sparse; elytra large, but slightly longer 
than wide, fully a fourth wider than the head, two-fifths wider than the 
prothorax and distinctly longer than the latter, subparallel and feebly 
