3(52 



REVISION OF THE TENEHRIONIDyE OF AMERICA, 



lunar emargination, short and transverse. The ligula is almost entirely concealed. The 

 mandibles are anteriorly emarginate at tip. The parapleurse of the metathorax appear to 

 be connate with the sternum, at least the sutures cannot he detected with such micro- 

 scopic power as can be used. The prothorax is very short, nearly three times as broad 

 as long, broadly emarginate in front, trisinuate at base. At the middle of the base of the 

 thorax, opposite the scntellum, is a very abrupt and deep depression, and between it and 

 each angle a moderate sinuation. The elytra have also a scutellar depression opposite 

 that of the prothorax. The humeri are distinct and the base feebly emarginate. 



A. singularis, oval, brownish, sub-depressed. Head and thorax (?densely and coarsely punotared) densely 

 clothed with yellowish scales, of which some arc. larger and more prominent. Thorax slightly narrower behind, sides 

 feebly rounded, hind angles obtuse. Elytra with nine rows of large punctures, the interspaces bearing short, thick, 

 erect, capitate yellow hairs distantly placed. Head, prothorax and legs beneath clothed with yellowish scales, the 

 rest of the surface coarsely but sparsely punctured, and with a, few scattered scales. 



Length .00 inch. » 



The head and thorax are so closely covered by scales that it is impossible to tell 

 whether there is any puncturing or not. With the exception of the (-reel, capitate hairs, 

 the elytra, are not clothed, and the surface is rather reddish brown and moderately shining. 

 This insect is by far the most interesting and singular of any of those discovered by 

 myself in California, and adds another to the list, still very limited, of blind Tenebrionida?, 

 and is the only blind insect known from California. The specimens are very rare and 

 found living with a small black ant under stones. They are difficult to obtain, owing to 

 their rarity, the peculiar conditions demanded as a residence by the ant and by the ex- 

 cessive numbers of the latter when found, rendering it very troublesome to search care- 

 fully in their neighborhood. 



TRIBE XXIII — CRYPTICINI. 



Hind coxye moderately distant, oblique. Head inserted as far as eyes, which are small 

 and reniforra and not coarsely granulated. Antennas slender, outer joints rounded, 

 slightly thicker. Presternum prolonged, mesosternum concave. Anterior coxa? nearly 

 round, middle coxa' with distinct trochantin. Tarsi spinous beneath ; first joint of hind 

 tarsi very long. 



CRYPTICUS, Lair. 

 Crypticus, Latr., Uegne Anim. ed. 1, III, p. 298. 



One genus and species constitute this tribe in our fauna, easily known by its oval de- 

 pressed form, resembling somewhat an Hydroporus. 



('. obsoleius, Say, Journ. Acad. Ill, 265. 

 Length .14-.16 inch. 



Occurs in the Southern Atlantic region. 



