3()2 REVISION OF THE TENKHKloN liu: OF AMERICA, 



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

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

 be connate with the sternum, at least the sutures cannot be detected with Mich 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 scutellum, is a very abrupt and deep depression, and between it and 

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

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



A. singularis, oval, browijish, sub-depressed. Eead and thorax Pdensely and coaiselj punctured densely 

 i [othed uiili yellowisli scales, of which som ■ ai*e larger and more prominent. Thorax slightly uarrower I" hind, sides 



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

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

 n"-t of the surface coarsely but sparsely punctured, and with :i few scattered scales. 



Length .06 inch. 



The head and thera\ are so closely covered hy scales that it is impossible to tell 

 whether there is any puncturing or not. With the exception of the erect capitate hairs, 

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

 This inseel is l>\ 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 Tenebrionidse, 

 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 hy the ant and hy the ex- 

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

 l'ull\ in their neighborhood. 



TRIBE XXIII — CRYPTICINI. 



Hind coxae moderatel) distant, oblique. Head inserted as far as eyes, which are small 

 and reniform and not coarselj granulated. Antenna' slender, outer joints rounded. 

 slightlj thicker. Prosternum prolonged, mesosternum concave. Anterior coxae nearly 

 round, middle coxae with distinct trochantin. Tarsi spinous beneath; first joint of land 



tarsi verj long. 



CRYPTICUS, Lair. 



Crypticus, Latr., Regne A.nim. ed. 1. III. p. 298. 



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

 pressed form, resembling somewhat an Hydroporus. 



('. obsol< i ns. Say, Journ. Ami. III. 365. 



Lengl li . i I .16 inch. 



Occurs in the Southern Atlantic region. 



