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. Lengtb 3.9 mm.; width 0.53 mm. 
Rhode Island to Iowa, Nebraska and Texas. [=centralis Aust.]. 
discopunctatus 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, distinctly 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 0.6mm. New Mexico (Albuquerque) .........-.zZUni 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 Jength 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-fifths to one-half wider 
and longer than the prothorax; longer than wide, narrowed only very 
near the apex; abdomen slender, at base much narrower than the 
elytral apex, gradually perceptibly 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 ....ecssececcceccccee sees sAPIZONIANUS 0. Sp. 
Body pale ochreo-testaceous throughout, the abdomen with the lest 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... .cescecccccesccescce secececcsece 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 
