Casey — A Revision of the American Paederini. 223 
7 —Elytra large, much wider than the head..-..++s+s+sseeeeseeereeeseee8 
Elytra small, always distinctly narrower than the head......-.-+.++++..+. 9 
8 — Stout in form, convex, shining, obscure rufo-piceous in color, the elytra 
subpiceous with pale apex, the abdomen blackish, the legs throughout 
pale lateo-flavate; head fully as wide as long, rather coarsely punctate, 
the punctures shallow, not coalescent but polygonally crowded, each 
with a crater-like centre bearing a small hair, strong but sparse on the 
under surface; eyes large, at scarcely their own length from the base, 
the sides behind them rounded in circular arc to the feebly rounded and 
broadly subtruncate base; labrum large, the teeth small; antennae 
rather thick; prothorax unusually large, but little longer than wide, 
nearly three-fourths as wide as the head, the obtuse angles at apical 
third distinctly rounded, the punctures rather coarse but not very dense, 
the surface shining, the broad polished impunctate median line not at all 
canaliculate; elytra quadrate, more than one-half wider than the pro- 
thorax and two-fifths longer, finely, subasperately and sparsely punctate ; 
abdomen narrower than the elytra, minutely, subasperately and rather 
closely punctate; legs only moderately long and slender. Male with 
the fifth ventral broadly and feebly flattened toward the middle, the 
apex rectilinearly truncate and unmodified, the sixth segment with a 
large rounded sinus much wider than deep. Length 3.9 mm.; width 
0.8mm. Rhode Island, Virginia, Lake Superior and Texas (Austin). 
angularis Er. 
Form and size the same as in angularis; color more nearly piceous; head 
above rather finely and densely punctate, not rugose; below rufo-piceous, 
polished, somewhat sparsely punctate; sides behind the eyes slightly 
convergent, the hind angles rounded; base truncate; prothorax densely 
punctate, with a narrow, smooth and slightly elevated median line; 
elytra more finely and sparsely punctate, the tips narrowly pale; ab- 
domen very finely, moderately densely punctured. Male with the fifth 
ventral toothed at the middle of the hind margin, the sixth triangularly 
emarginate. Length4.0mm. California (Los Angeles and Kern Cos.). 
occiduus Fall 
9— Moderately slender, subparallel, piceous-black, the elytra scarcely at 
all paler at tip, the abdomen black, the legs throughout pale luteo- 
flavate, the antennae dusky testaceous; surface somewhat shining, the 
punctures of the head and prothorax moderately coarse and densely 
subconfluent, of the elytra finer, subasperate and rather close-set, of 
the abdomen very fine, subasperate and moderately dense; head large, 
fully as wide as long, the eyes very large, convex and prominent, at 
notably less than their own length from the base, the sides behind 
them rapidly converging and broadly arcuate to the feebly arcuate base; 
prothorax much elongated, only three-fifths as wide as the head, of the 
usual form, the polished median line rather narrow but scarcely at all 
concave; elytra relatively very small, notably shorter than the pro- 
thorax and not much more than a fourth wider, quadrate, the sides very 
feebly diverging from the base, the surface unusually depressed or 
flattened; abdomen at base fully as wide as the elytra, wider at the 
middle, the sides parallel and feebly arcuate as usual; legs long. 
Male with the apex of the fifth ventral rectilinearly truncate and un- 
