Casey — A Revision of the American Paederini. 33 



the punctures coarse, rather close-set and irregular in arrangement; 

 abdomen but slightly narrower than the elytra, sparsely but distinctly 

 punctulate, each segment with a large shallow fovea at base and lateral 

 fourth or fifth. Male unknown; female with the abdomen completely 

 unmodified, the sixth ventral obtusely and transversely arcuato- 

 truncate at apex. Length 10.0 mm.; width 1.6 mm. Virginia (Nor- 

 folk) virginicum n. sp. 



Head narrowed behind the eyes, the sides converging from the latter to the 

 very broadly rounded and subobsolete basal angles and but slightly 

 arcuate . 8 



8 — Form rather stout, piceous-black throughout; the abdomen not paler 



at tip, the legs very pale, the autennae dusky except toward base; head 

 longer than wide, much narrower than the elytra, coarsely, deeply and 

 closely punctured; prothorax rather short, but little longer than wide, 

 much narrower than the head, the sides parallel and almost straight, 

 the punctures notably coarse, deep, moderately sparse, unevenly dis- 

 posed; elytra parallel, about a fifth longer than wide, nearly one -half 

 wider and two -fifths longer than the prothorax, rather coarsely, deeply 

 and closely punctate, the punctures obscurely serial except toward 

 apex; abdomen distinctly narrower than the elytra, strongly, not 

 densely punctulate. Male with a transverse setose discal fold at the 

 middle of the second and third ventrals, the folds equal in size and 

 about an eighth as wide as the segments; lobe of the third segment 

 obsolete in specimens at hand; sixth ventral very obtusely rounded at 

 tip, becoming subtruucate toward the middle, the edge thinned and 

 translucent, the surface notably convex toward the edge posteriorly; 

 female not at hand. Length 9.4 mm.; width 1.5 ram. Florida to New 



Jersey floridanum Lee. 



Form less stout and rather more convex, the head black, prothorax piceous- 

 black, the elytra dark rufous, the abdomen blackish, rufescent at tip; 

 head longer than wide, subequal in width to the elytra, less coarsely 

 and closely punctate; prothorax distinctly narrower than the head, 

 much more elongate than in floridanum and nearly a third longer than 

 wide, parallel and nearly straight at the sides, the punctures less coarse 

 and about equally close- set; elytra much narrower and more elongate, 

 parallel, two-fifths wider and a fourth longer than the prothorax, less 

 coarsely but rather more closely punctate, the punctures without serial 

 arrangement; abdomen almost as wide as the elytra, the punctures dis- 

 tinct and not close-set. Male with a very strongly developed transverse 

 setose fold near the middle of the second and third segments, somewhat 

 as in floridanum, the folds larger, nearly a sixth as long as the width 

 of the segment; lobe of the third obsolete in specimens at hand; sixth 

 segment narrower, obtusely rounded at tip, the surface cylindrically and 

 transversely convex throughout, not at all convex toward tip; female 

 unknown. Length 8.0 mm.; width 1.35 mm. New Jersey. 



convergens Csy. 



9 — Female with the abdomen wholly unmodified; male with a rounded 



discal fovea on the third, and a transverse fold on the second ventral. 10 



Female with a short transverse setose discal fold near the middle of the 



second ventral, the third and remainder of the abdomen unmodified. 13 



