Casey — A Revision of the American Paederini. 241 



like notch, having broadly arcuate, moderately flaring and broadly 

 beveled sides, the opening rather wider than the depth and nearly 

 half as wide as the segmental apex. Length 3.9 mm.; width 0.53 mm. 

 Rhode Island to Iowa, Nebraska and Texas. [= centralis Aust.]. 



discopuiictatus Say 

 15— Body slender, parallel, black or piceous-black in color throughout, 

 the legs and antennae pale; head elongate, nearly or quite as wide as 

 the elytra, the eyes moderate in size and prominence, at fully their 

 own length from the base, the sides behind them at first feebly converg- 

 ing, then broadly rounded into the more feeble arcuate base; prothorax 

 oval, slightly longer than wide, visibly narrower than the head, the 

 sides broadly rounded anteriorly, thence only just visibly convergent 

 and very feebly arcuate to the broadly rounded basal angles, the sides 

 with an erect seta anteriorly and posteriorly; elytra moderate in size, 

 elongate, oistinctly narrowed toward tip, a fourth or fifth wider and 

 longer than the prothorax; abdomen moderately slender, but slightly 

 wider posteriorly. Male unknown. Length (strongly extended) 4.7 

 mm.; width 0.6 mm. New Mexico (Albuquerque) zuni n. sp. 



Body slender, pale ochreo-testaceous in color throughout, the last two ven- 

 trals never more than very slightly darker in color and never black 

 or blackish; head as wide as the elytra or extremely nearly so, of the 

 usual form; eyes unusually large but only very moderately convex, at a 

 little less than their own length from the base, the latter broadly sub- 

 truncate with the angles broadly rounded; prothorax rather small, 

 very much narrower than the head, evenly ovoidal, broadly rounded 

 anteriorly, the sides thence rather strongly converging and nearly 

 straight to the subcircularly rounded base, the side margins with a sin- 

 gle seta anteriorly and posteriorly; elytra two-flfths to one-half wider 

 and longer than the prothorax; longer than wide, narrowed ouly very 

 near the apex; abdomen slender, at base much narrower than the 

 elytral apex, gradually pprceptibly wider behind. Male with the fifth 

 ventral unmodified, the sixth with a very acutely angulate notch, having 

 nearly straight sides which flare into the apex through less than usually 

 arcuate angles, the opening not more than a fourth as wide as the 

 segmental apex and a little narrower than the depth. Length 4.2 mm. ; 

 width 0.55 mm. Arizona (Holbrook and Peach Springs) and New 

 Mexico, — Mr. Wickham arizoniaims » . sp. 



Body pale ochreo-testaceous throughout, the abdomen with the last two 

 segments black or blackish; prothorax broadly rounded at the sides 

 anteriorly, the side margin generally with two strong tactile setae 

 anteriorly and one near the base 16 



16 — Form very slender; head elongate, slightly narrower than the elytra, 

 the eyes only moderate in size but strongly convex and prominent, at 

 obviously more than their own length from the base, the basal part of 

 the head behind them semicircularly rounded, with but slight traces of 

 median truncature; prothorax much narrower than the head, elongate- 

 oval, the sides moderately converging from the broadly rounded anterior 

 part to the subcircular base; elytra slightly elongate, gradually and 

 distinctly narrowed toward tip, two- fifths wider but scarcely a third 

 longer than the prothorax; abdomen very slender, at base distinctly 



