276 REVISION OF THE TENEBRIONIDiE OP AMERICA, 



anterior coxa;. The head is suddenly constricted behind the eyes, partly forming the an- 

 gle. The eyes are oval, longitudinal and hounded beneath by the margin of the head. 

 The thorax is strongly constricted at its middle, with a tubercle on each side bridging 

 the constriction and uniting above the parts before and behind it. The elytra are elongate 

 oval, flattened above, emarginate at base, with the angles very distinct ; epipleura narrow. 



Length .18-20 inch. 



This insect, recalling remarkably the Rhyssodes, is found over a large extent of 

 country, and is probably not rare, specimens being found from Yallecito, Cal., to Fort 

 Grant, Arizona. It usually occurs in small colonies of three or four, under stones in very 

 dry places, and when captured feigns death so persistently that I have never seen one 

 walking. 



There remains but one insect described in this sub-family whose position has beeii un- 

 accounted for, Dysinathes Sahlbergii, Mann. From the measurements and characters as- 

 signed to this insect, I am inclined to believe it identical with the Amphizoa insolens. 

 Lee, and so stated some months since in a verbal communication to the American Ent. 

 Societj . 



Sub-Family II.— ASIDID^E. 



The essential character of this sub-family is, — the middle coxa' are not entirely en- 

 closed by the sterna, but are open externally and completed by the parapleural The 

 The trochantin is here always more or less visible. The tarsi are for the most part spinose, 

 in but one genus silky pubescent ( Nyctoporis). 



This sub-family consists in our fauna of six tribes, which may be arranged in the fol- 

 lowing order: 



Labrum scarcely visible; 



Anterior tibia' broadly dilated. axepsiini. 



Anterior tibia' slender. 



Tarsi pubescent, spurs minute, genre prominent, NYCTOl'ORiNi. 



Tarsi setose, spurs lar^e, genae not prominent. ckyi'TOGLOSSINI. 



Labrum prominent, in great part visible; 



[ntercoxal process of abdomen broad, truncate; 



Mentum large, li<jula scarcely visible. asimni. 



Mentum small, ligula lunate exposed, BRANCHING 



Intercoxal process acute, triangular. CONIONTINI. 



TRIBE XI — ANEPSIINI. 

 Mentum moderate, supported by a short broad gular peduncle, ligula concealed, max- 

 illa' visible. Epistoma rounded in front, labrum entirely concealed. Middle coxa? open 



