Casey — A Revision of the American Paederini. 9$ 



Elytra small, never much wider and always distinctly shorter than the pro- 

 thorax, the body more slender and rather more convex 6 



2 — Head as wide as the elytra — probably in both sexes 3 



Head much narrower than the elytra in the female, possibly less obviously so 



in the male i 



3 — Body rather stout, parallel, shining, black throughout, the sutural mar- 



gin and line of the apex rufescent; legs and antennae dark testaceous j 

 head large, sparsely punctured, much wider at base than across the 

 eyes, the sides straight, the angles narrowly rounded; neck barely 

 half as wide ; antennae thick, not quite as long as the head and prothorax, 

 joints two and three equal, about one-half longer than wide, the fourth, 

 a little shorter, the outer joints not longer than wide, rounded; pro- 

 thorax three -fourths as wide as the head, distinctly elongate, subpar- 

 allel, the sides just visibly converging, the angles rather distinct and 

 but little rounded, the punctures larger than those of the head, coarse 

 and only moderately sparse ; elytra fully a fourth wider and a fifth lon- 

 ger than the prothorax, parallel, distinctly longer than wide, the punc- 

 tures coarse, moderately sparse and only very obscurely and partially 

 sublineate; abdomen distinctly narrower than the elytra, parallel and 

 straight at the sides, finely, not closely punctulate, shining; legs mod- 

 erately slender, the hind tarsi there-fourths as long as the tibiae. Male 

 unknown; female with the sixth ventral broadly, evenly rounded, 

 scarcely lobed. Length 5.8 mm.; width 0.97 mm. Virginia (Grafton). 



virginica n. sp. 



Body more slender, parallel, deep polished black throughout, the legs 

 piceous- black, the antennae fuscous; head narrower and more oval,, 

 parallel and broadly arcuate at the sides, the basal angles rather broadly 

 rounded, the neck rather more than half as wide, the eyes moderately 

 developed, at about three times their own length from the base; punc- 

 tures moderately coarse, deep and sparse; antennae thick, nearly as in 

 virginica; prothorax four-fifths as wide as the head, distinctly elon- 

 gate, subparallel, the sides nearly straight, the punctures but little 

 larger than those of the head, rather feeble and very sparse, deeper and 

 more closely aggregated along the median smooth line but not lineate; 

 elytra rather finely, sparsely punctate, longer than wide, parallel, about 

 a fifth wider than the prothorax but not quite as long in the male,, 

 probably fully as long in the female ; abdomen parallel, straight at the 

 sides, nearly as wide as the elytra, convex, finely, sparsely punctulate. 

 Male with the fifth ventral moderately impressed and subglabrous in the' 

 middle, except toward base, the apical margin very feebly and gradually 

 sinuate in the middle; sixth with a declivous parallel polished impunc- 

 tate and deep excavation in median fourth or more, beginning near the 

 base, the apex with a quadrate emargination as wide as the impression,, 

 the sides of which are parallel and formed in part by dentiform prolon- 

 gations of the sides of the excavation, the bottom transversely sinuate ; 

 female unknown. Length 5.9 mm.; width 0.85 mm. Oregon. 



shoshonica n. sp* 



4 — Elytra equal in length to the prothorax; species very small in size. 

 Body moderately stout, subparallel, deep black throughout, the legs and 

 antennae piceo-rufous; head quadrate, as long as wide, parallel and 



