Casey — A Revision of the American Paederini. 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; neek 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; presternum convex longitudinally. Length 

 4.0 mm.; width 0.85 mm. New Mexico (Coolidge), — Mr. Wickham. 



nitidnlnm n. sp. 



Body somewhat stout and depressed, dullish in lustre, pale castaueous 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 

 of the head rugosely and closely punctured but rather less coarsely than 

 in nitidulum, the gular sutures similar but more impressed; presternum 

 flattened longitudinally, the carina more conspicuous than in nitidulum. 

 Length 4.6 mm. ; width 0.95 mm. California (LakeTahoe). 



opacnlnm n. sp. 



13— 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) texaiium n. sp. 



