Casey — A Revision of the American Paederini. 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 a little 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 and a 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 imp-ession 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. Massachusetts dentiger Lee. 



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 than in dentiger; legs brown in color. Male characters substantially 

 similar, excepting 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) 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 into the base, the angles being much more broadly 

 rounded at base than in denser; 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 



