Casey — A Revision of the American Paederini. 201 



Body moderately slender, deep and shining black throughout, the femora and 

 tibiae blackish, the tarsi and antennae paler, brown; reticulation sub- 

 obsolete; head as usual, the eyes very well developed; prothorax dis- 

 tinctly longer than wide, much narrower than the head, the sides sub- 

 parallel and nearly straight, sparsely punctulate, the anterior angles 

 about a fifth from the apex and broadly rounded ; elytra notably elongate, 

 one-half wider and longer than the prothorax; gular sutures obliterated, 

 rather widely separated, the intermediate surface polished and smooth, 

 the feeble reticulation of the remainder of the surface being obsolete. 

 Male secondary characters of the sixth segment nearly as in punctatus, 

 the hind margin of the fifth having a very short, broadly and evenly 

 rounded lobe in median fifth or sixth, the surface not impressed but 

 having a feeble rounded tumor on the median line at apical third. Length 

 2.7 mm.; width 0.53 mm. California (Sta. Cruz and San Mateo Cos.). 



distinctns n. sp. 



13 — Notch of the sixth segment large, deep and angulate as in punctatus, 



the segment also feebly impressed in front of the emargination as in 

 that species; fifth segment broadly, feebly sinuato-truncate and feebly 

 impressed. Body slender, black or piceous-black in color, shining; 

 head of the usual form, parallel, the antennae gradually and distinctly 

 thickened toward tip; prothorax much narrower than the head, dis- 

 tinctly elongate, parallel, the anterior angles broadly rounded and at 

 apical fourth or fifth, the punctures sparse and feeble; elytra parallel, 

 distinctly elongated, two-fifths wider but only about a third longer than 

 the prothorax; gular sutures fine but evident, moderately separated, 

 the intermediate surface plane and not differing in sculpture. Length 

 2.75 mm.; width 0.5 mm. California (Pomona and San Bernardino). 



fraternns Fall 

 Notch of the sixth segment in the form of a broadly rounded simple sinus, 

 wider than deep. Body piceous-black, the abdomen black, the legs 

 brown throughout, shining, the head and pronotum fiaely but distinctly re- 

 ticulate, the punctures sparse and almost completely obsolete, those of 

 the elytra fine and sparse; head but slightly elongate, the antennae more 

 slender than in fratemus and scarcely visibly incrassate distally; pro- 

 thorax but little longer than wide, much narrower than the head, par- 

 allel, the anterior angles broadly rounded and at apical fourth or fifth; 

 elytra distinctly longer than wide, parallel, one-half longer and wider 

 than the prothorax; gular sutures well separated but almost wholly 

 obliterated, the intermediate surface but little smoother than the 

 remainder and becoming broadly concave toward base. Male with the 

 fifth segment broadly, feebly impressed along the middle throughout 

 the length, the apical margin transversely truncate, with a narrow and 

 very feeble arcuation at the middle but scarcely lobed; sixth segment 

 with a broad rounded sinus between two and three times as wide as 

 deep, the surface adjoining anteriorly with a triangular impression 

 having abruptly defined side margins. Length 2.7 mm. ; width 0.5 mm. 

 California (Siskiyou Co.) shastanus n. sp. 



14 — Rather slender, deep polished black throughout, the reticulation of the 



head and pronotum wholly wanting, the legs and antennae pale brown, 

 the femora dusky ; head scarcely at all longer than wide, of fche usual 



