NEW NORTH AMERICAN PSELAPHIDiE. 457 



eyes large, coarsely granulate, convex, prominent, at less than their own 

 length from the base; the latter broadly arcuate; occiput having, on a line 

 through the middle of the eyes, two large, feebly impressed, spongiose f'ovese, 

 mutually scarcely more distant than either from the eye; antennae nearly 

 one-half as long as the body, joints two to ten transverse, cylindrical, first 

 joint flattened, about as long as wide, second small, eleventh slightly longer 

 than the two preceding together. Prothorax distinctly wider than the head, 

 widest in the middle; sides rather broadly rounded, almost straight near the 

 apex and base; the latter transverse, abruptly arcuate in the middle third, 

 one-third wider than the apex and but slightly narrower than the disk; apex 

 broadly, very feebly emarginate; posterior angles slightly rounded; disk one- 

 hdlf wider than long, moderately convex, feebly tuberculate in the middle 

 anteriorly; median fovea feebly impressed, elongate, elliptical, beginning at 

 the middle and continuing nearly to the basal margin; lateral foveas smaller, 

 circular, deeply impressed, at one-third the length from the base. Elytra 

 at base as wide as the base of the prothorax, at apex three-fourths wider; 

 humeri but slightly prominent; sides evenly arcuate; together very slightly 

 wider than long, each with two large basal foveas; sutural stria coarse, deep, 

 nearly straight, approaching the suture toward apex; discal coarse, deep, 

 slightly arcuate, continuing for about three-fourths the length. Abdomen 

 slightly narrower than the elytra, about equal in length to the latter; sides 

 nearly parallel, feebly arcuate; border strong, diminishing in width; surface 

 broadly convex. Legs rather long and slender, alutaceous, very densely 

 clothed with minute recumbent setas; middle trochanters very slender; tarsi 

 rather short; claws small, equal. Metasternum impressed in the middle, 

 more strongly so posteriorly. Length 2.8 mm. 



California (Los Angeles 2.) 



The four outer joints of the antennae are more finely and 

 densely pubescent and slightly paler in color, the eighth 

 joint two-thirds wider than long, much shorter than the 

 ninth or 4 tenth, the latter nearly equal. 



This interesting species lives in the nests of a small pale 

 brown ant. 



PYTNA n. gen. (Tyrides.) 



The present genus has the pubescence fine and subre- 

 cumbent and not short, robust and recumbent as in the 

 Ctenistides; following the classification suggested by Reit- 

 ter, it should therefore be placed in the group indicated. 



Antennas approximate; club gradual, three-jointed. Maxillary palpi four- 

 jointed; basal joint minute; second long, clavate, bent; third shorter, ob- 



