426 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



ceous. Elytra as wide as pronotum at base, width 1.7 mm., length 

 2.3 mm., base strongly margined, humeri dentate, sides wealdy arcu- 

 ate, not fimbriate; striae moderate, strial punctures fine and deep; 

 intervals moderately convex, finely alutaceous but shining, crenate 

 along inner margin by a row of deep, moderate punctures, the punc- 

 tures or crenations as wide as the stria and nearly separated from it, 

 and with a row of fine to moderate, shallow, punctures near the out- 

 side margin. Metasternum smooth, shining, minutely punctate at 

 middle, midline deep, the ends slightly deeper, anterior postcoxal line 

 distinct, extending outward to the scabrous area at extreme sides, 

 posterior depressed line in front of posterior coxal plate distinct. 

 Abdominal segments minutely alutaceous, finely crenate along anterior 

 margin, finely margined along the posterior edge, carinately margined 

 at extreme sides, each segment with a transverse, median row of fine 

 setigerous punctures bearing very fine, moderately long hair, terminal 

 segment widely crenate in front. Pygidium scabrous, fringed with 

 moderately long fine hairs. Anterior femur with deep, entire mar- 

 ginal line, posterior face smooth except for a few moderate punctures 

 at elbow. Middle and posterior femurs with deep, almost entire 

 posterior marginal line, otherwise smooth with the usual row of three 

 or four setigerous punctures at the knee. Posterior femur about one- 

 tenth wider than the middle femur. Posterior tibia three times as 

 long as wide at apex, spurs very narrow, long spur subequal in length 

 to first two tarsal joints combined. First tarsal joint elongate-tri- 

 angular, equal in length to following two together. Length 3.6 mm., 

 width 1.7 mm. 



Type: USNM 61844. 



Type locality: Saltillo, Coahuila, Mexico. 



Specimens examined: The unique holotype only. 



Remarks: This single specimen, bearing Prof. Wickham's label and 

 locality only, is another species in the interrwptus complex. It is one 

 of the larger species in the group and is easily identified by the punc- 

 tures along each margin of the elytral intervals. 



Psammodius mimeticus (Fall) 



Psammobius mimeticus Fall, Journ. New York Ent. Soc, vol. 40, p. 192, 1932. 



Oblong oval, moderately shining, rufopiceous. Antennae rufotesta- 

 ceous. Head convex, closely, moderately verrucose; occiput smooth 

 with a short band of close, fine to moderate punctures above the eye. 

 Clypeus moderately, deeply, angularly emarginate, the limiting angles 

 rounded each side, angles and sides finely reflexed, sides weakly arcu- 

 ate; genae fimbriate, broadly rounded and inconspicuous. Pronotum 

 narrower in front, width 1.4 mm., length 1.1 mm., anterior angles 

 rounded, approximately right-angled, posterior angles obtuse, sides 



