Casey — A Revision of the American Paederint. 165 
12— Body rather stout, parallel, dark rufo-ferruginous throughout, the 
head and pronotum shining, though finely, rather closely punctate, the 
latter less closely, the elytra finely, very closely and more distinctly, 
the abdomen extremely minutely and densely; head moderately large, 
almost as wide as long, the sides parallel and nearly straight from the 
eyes to the basal angles; neck half as wide as the head; prothorax 
large and well developed, subequal in width to the head, a little wider 
than long, the sides almost straight and parallel, the angles obtusely 
rounded; elytra large, much larger than the head, somewhat longer 
than wide, a fourth wider and one-half longer than the prothorax, — 
the sides subparallel; under surface of the head more coarsely, 
closely and rugosely punctured, the sutures as in the preceding 
species, with the narrow intervening space becoming polished and 
impunctate toward base; prosternum convex longitudinally. Length 
4.0 mm.; width 0.85 mm. New Mexico (Coolidge),— Mr. Wickham. 
nitidulum n. sp. 
Body somewhat stout and depressed, dullish in lustre, pale castaneous in 
color, the head above and the metasternum darker, piceous; punctures 
. fine, feeble and very close-set on the head, sparse on the prothorax, 
minute and very dense on the elytra and abdomen; pubescence rather 
conspicuous; head moderate, as long as wide, parallel and nearly 
straight at the sides; prothorax a trifle narrower than the head, slightly 
obtrapezoidal, somewhat wider than long; elytra much wider than the 
head, quadrate, not longer than wide, notably wider and longer than 
the prothorax, parallel, the sides very feebly arcuate; under surface 
ofthe head rugosely and closely punctured but rather less coarsely than 
in nitidulum, the gular sutures similar but more impressed; prosternum 
flattened longitudinally, the carina more conspicuous than in nitidulum. 
Length 4.6 mm.; width 0.95 mm. California (Lake Tahoe). 
opaculum np. sp. 
18— Body small, slender, parallel, polished, the elytra and abdomen duller, 
rufo-piceous in color throughout, the head usually darker; head and 
pronotum minutely but deeply and rather closely punctate, the latter 
but slightly less closely and equally strongly, with a broad smooth 
median line; head small, as long as wide, parallel and nearly straight 
at the sides, with slightly obtuse and distinctly, though not broadly, 
rounded basal angles; antennae slender, not as long as the head and 
prothorax combined; prothorax wider than the head, as long as wide, 
quadrate, the sides parallel and very feebly arcuate, the angles rounded; 
elytra quadrate, not longer than wide, but little wider though notably 
longer than the prothorax, parallel, sometimes broadly and nubilously 
paler toward the sides and narrowly at tip; under surface of the head 
shining, finely, sparsely punctate, the gular sutures very fine, almost 
obliterated, converging, becoming moderately narrowly separated pos- 
teriorly; prosternum convex, not at all carinate except posteriorly. 
Male with the fifth ventral unmodified, the sixth broadly sinuato- 
truncate throughout its width at apex, the sinuation very feeble; male 
rare, the female abundant. Length 2.9 mm.; width 0.5 mm. Texas 
(Austin and Columbus)... .ccceeveccecceescececcoe sees t@XANUM N. Sp. 
