496 CASEY 



equal in length and together but little longer than the fourth, 

 which is bent downward toward tip, the claws very small, rapidly 

 aciculate and feebly arcuate. [Type T. singularis Lin.]. 



Typhlusechus 



The above description is very detailed and will probably 

 serve for comparison with related genera, in any direction, 

 however unsuspected at present. Linell places this tribe in the 

 Asidinae, but it has so much affinity with the tribes here dis- 

 cussed, that I prefer to treat it with them, and moreover, there 

 appears to be no trochantin attached to the middle coxae. 



TypMusechus Linell. 

 It is probable that the minute species of this genus occur in 

 very secluded stations, under deeply imbedded stones or pos- 

 sibly with ants ; the original notes of Mr. Linell are not before 

 me at present. The cotype here described was very kindly 

 given me by Mr. Chas. Fuchs, of San Francisco, some years 

 ago ; its chief specific characters are as follows : — 



Form moderately slender, parallel, evenly and transversely but moder- 

 ately convex, rather shining, glabrous, dark testaceous in color; 

 head quadrate, finely, rather closely punctate, the sides somew^hat 

 abruptly oblique and straight anteriorl}^ to the broadly sinuate 

 apex ; prothorax large, conspicuously wider and very much longer 

 than the head, scarcely longer than wide, widest very near the 

 apex, where the sides are rather prominently rounded, thence at 

 first slightly sinuate and then nearly straight and feebly, evenly 

 converging to the base, the apex sinuato-truncate, distinctly wider 

 than the broadly arcuate base, the surface finely, somewhat closely 

 punctate, with an entire smooth and impunctate line, the con- 

 cavity along the thick reflexed lateral beaded edge with a row of 

 coarser punctures anteriorly ; elytra equal in width to the pro- 

 thorax and three-fifths longer, about three-fifths longer than wide, 

 the sides parallel and straight, rounding slightly at base to the 

 rather prominent humeral angles, obtusely parabolic at tip, the 

 surface extremely minutely, somewhat sparsely punctate, the 

 suture very fine and simple ; abdomen rather finely, somewhat 

 sparsely punctate, becoming extremely minutely and sparsely so 

 toward tip, the last ventral circularly rounded and almost as long 

 as the two preceding combined. Length 1.7 mm.; width 0.48 

 mm. California (Los Angeles Co.) singularis Linell 



There are many singular characters pertaining to this very 

 minute Tenebrionid, besides the eyes, antennas and intrusion of 

 the sides of the abdomen upon the epipleurae posteriorly, — 



