Casey — A Revision of the American Paederini. 213 



Jongitudinally divided anteriorly by a tumid ridge and tliat the sinus at 

 the apex is rather smaller and about twice as wide as deep. Length 

 3.7 mm.; width 0.55 mm. Colorado (Salida), — Mr. Wickham. 



procera n. sp. 

 Form nearly similar to the preceding, slender, polished, black, the legs 

 black with the tarsi pale; head narrow, elongate, the sides parallel for 

 rather more than half the longitudinal distance from the eyes to the 

 middle of the base, then semicircularly rounded, not subtruncate 

 medially; prothorax about equal in width to the head, elongate, the 

 sides subparaWel, broadly arcuate, very obtusely subangulate at apical 

 fourth; elytra parallel, evidently elongate, nearly one-half wider and a 

 fourth longer than the prothorax, impressed on the suture behind the 

 scutellum; legs rather slender. Male having a deep and elongate - 

 oval impression occupying median third of the fifth ventral and 

 extending virtually to the base, the posterior margin with a transverse 

 emargination, the sides of which are formed by rather short obtuse pro- 

 longations of the sides of the impression, the emargination not quite 

 one-third as deep as the length of the impression before it, the posterior 

 margin of the impression very feebly lobed and pubescent at the middle 

 but without an acute subelevated process; sixth segment with a large 

 simple apical sinus about three times as wide as deep, the surface 

 before it apparently somewhat impressed. Length 3.4 mm. ; width 0.35 



mm. Nevada (Reno) angusticeps n. sp. 



5 Body elongate, parallel, somewhat stouter than angusticeps, shining, 



black, the legs and antennae red -brown throughout; head well 

 developed, rather wider just before the basal angles than across the 

 eyes, the latter at nearly three times their own length from the base, 

 which is broadly, transversely truncate, the angles moderately broadly 

 rounded; prothorax elongate-oval, scarcely three-fourths as wide as 

 the head, rapidly narrowed anteriorly as usual ; elytra notably elongate, 

 parallel, nearly one-half wider and a third longer than the prothorax, 

 the punctures fine and scarcely at all asperate ; abdomen subparallel, 

 much narrower than the elytra and not quite as wide as the head, 

 Male unknown. Length 3.9 mm.; with 0.63 mm. California (Mendo- 

 cino Co.) truncaticeps Csy. 



The description of brunnijyes, given above, is from some 

 pencil notes taken by the author some years ago from the 

 orisinal type. It is a smaller and more slender species than 

 the eastern purifana, the latter differing also in having the 

 spiniform process of the fifth ventral broader, more triangular 

 and pubescent, though having the same subterminal single 

 lateral setae, and the sinuation of the sixth segment is smaller 

 and rather more broadly rounded. The spiniform process in 

 bnmnipes, as well as the posterior part of the concavity, is 

 completely glabrous. The Calif ornian rotundiceps Csy . , is sim- 



