Casey — A Revision of the American Paederini. 65 
at about two-fifths from the apex, the sides very broadly arcuate even 
anteriorly; elytra quadrate, much wider but barely as long as the 
prothorax in the male, much longer than wide, a fourth wider and very 
slightly longer than the prothorax in the female, the sides subparallel, 
very feebly arcuate, the punctures becoming subobsolete toward tip; 
abdomen parallel, a little narrower than the elytra in the male, equal 
in width to the latter in the female. Male with the apex of the fifth 
ventral feebly sinuato-truncate, the slit of the sixth narrow, parallel 
and deep, the sixth ventral of the female feebly impressed along the 
middle. Length 4.5-5.0 mm.; width 0.78-0.88 mm. New York (along 
the ocean beaches) .....-cccereccccecceccccceccsecees ODliteratus Lec. 
Elytral punctures coarse, deep and moderately close-set throughout ..... 7 
7 — Slit of the sixth ventral in the male rounded at the bottom, the adjoin- 
ing surface of the segment not very distinctly impressed............- 8 
Slit of the sixth segment acutely angulate at the bottom in its external edge, 
the internal edge narrowly rounded, the edge between the angle and 
arcuation beveled; knees generally GUSKY..ce.ssee cece cece ccvece Seach 
8 — Elytra larger, distinctly wider and longer than the prothorax in both 
sexes. Body stouter, somewhat as in saginatus, the head relatively 
small, very much narrower than the elytra, not longer than wide, sub- 
orbicular, the eyes rather large but not very prominent, at a third more 
than their own length from the base, the sides behind them moderately 
converging and straight for a short distance, then very broadly rounded 
to the rather broadly arcuato-truncate base; prothorax slightly elongate, 
stout, fully as wide as the head, widest at about apical two-fifths, the 
sides very broadly rounded and only feebly converging toward base, the 
latter unusually broad; elytra quadrate, convex, parallel, a third wider 
and nearly a fourth longer than the prothorax; abdomen parallel, dis- 
tinctly narrower than the elytra. Male with the apex of the fifth ven- 
tral scarcely at all modified, the slit of the sixth subparallel and straight 
at the sides, narrow and fully three times as deep as wide, the edges 
finely and strongly beadedthroughout, the bottom narrowly, parabolically 
rounded, the adjoining surface of the segment scarcely at all impressed; 
female not known. Length 5.3 mm.; width1.0mm. Texas (exact local- 
ity NOt TECOTAEA).. +02 cece cae cece vccccecccevcesceccseee lOXANUS D. Sp. 
Elytra relatively smaller and GD narrower, subequal in higena to the 
PLOCNOTARS sceccncdeccvecs accciccaceeceucstesmesavaseceassvce bsee ceeed 
9— Elytra with the basal angles only ‘slightly exposed at eile head ob- 
trapezoidal behind the eyes in the male; body slender. Head distinctly 
elongate, the eyes small, at nearly twice their own length from the base, 
very convex and prominent, the sides behind them rather strongly con- 
vergent and straight for the length of the eyes, then moderately round- 
ing to the neck, the base moderately wide; antennae rufo-testaceous, 
dusky for some distance near the middle; prothorax rather narrow, 
much elongated and narrower than the head, widest before the middle, 
the sides broadly arcuate; elytra narrow and slightly elongate, parallel, 
the sides broadly, feebly arcuate, only very slightly wider than the pro- 
thorax and a little shorter than the latter, equal in width to the head; 
punctures less coarse and distinct than in the two following species; 
abdomen parallel, as wide as the elytra. Male with the fifth ventral 
