Casey — A Revision of the American Paederini. 215 
cylindric in form than in the other genera, the basal joint long, not 
quite equaling the next three combined; prothorax distinctly elon- 
gate, three-fourths as wide as the head, broadly rounded and subparallel 
at the sides, the latter more strongly converging and becoming very 
feebly sinuate to the nuchal collar which is half as wide as the base; 
elytra parallel, distinctly longer than wide, very slightly wider than the 
head, nearly a third wider and one-fourth longer than the prothorax, 
the apical margin narrowly and abruptly yellow in color; abdomen 
throughout very much narrower than the elytra, at base four- fifths as 
wide as at the apex of the fourth segment. Male with ventrals two, 
three and four narrowly and simply impressed in the middle, 
the fifth not distinctly modified, the sixth with a very large notch 
occupying its entire width and three or four times as wide as deep, the 
notch having the form of an incised cusp with widely diverging arcuate 
sides and with the angle right and not rounded, the surface scarcely at 
allimpressed. Length 3.8 mm.; width 0.7 mm. District of Columbia, 
North Carolina (Asheville) and Mississippi (Vicksburg).....opaca Lec. 
4 — Body elongate, subparallel, convex, rather shining with the elytra and 
abdomen duller, piceous-black throughout, the narrow apical margin 
of the elytra and the legs throughout pale honey -yellow, the antennae 
similar in color, the funicle dusky toward base; head scarcely as long 
as wide, the eyes well developed and prominent, the sides behind them 
parallel for about their own length, then broadly rounded into the 
truncate base; antennae slender, feebly incrassate; prothorax shorter 
and stouter than in opaca but otherwise nearly similar, about four-fifths 
as wide as the head, rapidly narrowed in apical third; elytra parallel, 
much longer than wide, equal in width to the head, about a fourth 
wider and longer than the prothorax; abdomen at the apex of the fourth 
segment equal in width to the elytra, much narrower at base. Male 
with ventrals two to five strongly impressed along the middle, the im- 
pressions increasing in width from a sixth or seventh as wide as the 
segment on the second to nearly one-half the total width on the fifth, 
those of segments two to four nearly similar in character and abruptly 
limited at the sides, that of the fourth with a small tooth at each side 
at apex and a larger acute tooth in the middle very near the apex, that 
of the fifth broadly oval, nearly flat, with the sides strongly convex but 
not acute, the apex broadly sinuate along the impression; sixth segment 
broadly, biobliquely impressed, the apex with a large simple subangu- 
late sinus about three times as wide as deep. Length 3.9 mm.; width 
0.66.mm., -Texas (Galveston), ...02s6:0 sis cw cs eecsecsdes elaborata n. sp. 
Body similar to that of elaborata but shorter and slightly stouter, pale 
dusky testaceous in color throughout, the antennae concolorous, feebly 
paler distally, the apical margin of the elytra and entire legs pale 
honey- yellow; head relatively larger, the basal angles still more broadly 
rounded; prothorax somewhat smaller and less stout, elongate, rapidly 
narrowed at apex as usual and scarcely three-fourths as wide as the 
head; elytra shorter and relatively wider, but little longer than wide, 
equal in width to the head; abdomen narrow at base, more rapidly 
broadening posteriorly. Male unknown. Length 3.5mm.; width 0.7 mm, 
Contral Tesaei evince vescsaws tee rece receceeeee rece sees DAIIENS D. SD, 
