NEW NORTH AMERICAN PSELAPHID^E. 473 



Ai pallidum n - sp. — Form rather slender, convex; pale flavo-testaceous 

 throughout, antennas and legs slightly paler and less rufous; integuments 

 polished, impunctate; pubescence fine, short, subrecumbent, rather sparse. 

 Head small, very much narrower than the prothorax; as lorjg as wide; eyes 

 rather large and prominent, somewhat finely granulated, at the middle of the 

 sides; genas distinctly shorter than the eyes, evenly rounded to the neck, not at 

 all prominent; base very feebly sinuate; occiput longitudinally impressed in 

 the middle; front having two round, impressed, spongiose foveas on a line 

 through the middle of the eyes, mutually twice as distant as either from the eye, 

 connected by a subangulate channel which is rather strongly impressed and 

 much wider than long; antennas short, one-half longer than the head, club 

 very robust, two basal joints subequal, slightly longer than wide, more ro- 

 bust than the funicle, joints three to seven moniliform, subequal, the former 

 slightly longer than wide, the latter slightly transverse, joints eight to ten 

 very short and strongly transverse, equal in length, acutely rounded at the 

 sides, the former twice, the latter more than three times as wide as long, 

 eleventh much wider, ovoidal, gradually acuminate, as long as the five pre- 

 ceding together. Prothorax widest at one-third the length from the apex, 

 where it is scarcely as wide as long; sides rather broadly rounded, feebly 

 convergent and nearly straight toward base; the latter evenly and rather 

 strongly arcuate throughout, fully four-fifths as wide as the disk, one-half 

 wider than the apex; disk convex, having at one-fourth the length from the 

 base a transverse, narrow, deeply impressed, posteriorly arcuate channel, 

 connecting the rather large, deeply impressed, spongiose lateral foveas and 

 continued posteriorly more than one-balf the distance to the basal margin 

 by a canaliculate impression; along the basal margin, very near the edge, 

 there is a narrow deeply-impressed line. Elytra at the humeri much wider 

 than the prothorax; sides feebly divergent, arcuate; humeri rather promi- 

 nent; together fully as long as wide; disk feebly convex, each trifoveate at 

 base;, sutural stria fine, deep, nearly straight; discal proceeding from the 

 third fovea, fine, nearly straight, parallel to the sutural, slightly double at 

 base, vanishing at a slight distance before the middle; second fovea without 

 trace of stria. Abdomen distinctly shorter, but very slightly narrower than 

 the elytra, rapidly declivous behind, parabolically rounded through its apical 

 half when viewed vertically; border narrow, slightly inclined; first segment 

 slightly longer than the second, having at base two fine,, slightly divergent 

 carinae which are very short and distant by less than one-fifth the abdomi- 

 nal width. Legs slender. Length 1.2 mm. 



California (Monterey Co.) 



This species is abundant under decomposing vegetation, 

 near the margins of small streams. 



A. politum ii- sp. — Form slender, convex; bright testaceous, legs and 

 antennas slightly paler, more flavate, abdomen darker, castaneous; integu- 



