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 ba«<e ; 

 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 

 all impressed. Length 3.8 mm.; width 0.7 mm. District of Columbia, 



North Carolina (Asheville) and Mississippi (Vicksburg) opaca Lee. 



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 



0.65 mm. Texas (Galveston) elaboratan. 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. Length3.5mm.; width 0.7 mm. 

 Central Texas pallens n . sp. 



