276 



REVISION OP THE TENEBRIONIO/E OP AMERICA, 



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

 gle. The eyes are oval, longitudinal and bounded 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, cmarginate at base, with the angles very distinct ; epipleunE 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 Vallecito, 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 L have never seen one 

 walking. 



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

 accounted for, Dysmathes Salilbergii, Mann. From the measurements and characters as- 

 signed to this insect, I am inclined to believe it identical with the Amphi/oa insolens. 

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

 Society. 



Sub-Family II.— ASIDIILF. 



The essential character of this sub-family is, — the middle coxae arc 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 arc 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. 

 Anterior tibia? slender. 



Tarsi pubescent, spurs minute, genee prominent, 

 Tarsi setose, spurs large, genee not prominent. 

 Labrum prominent, in great part visible ; 



Intercoxal process of abdomen broad, truncate ; 

 Meiitum large, ligula scarcely visible. 

 Mcntum small, ligula lunate exposed. 

 Intercoxal process acute, triangular. 



ANEPSIINl. 



NYCTOPORINI. 

 CRYPTOGLOSSINI. 



ASIDINI. 



BRANCHINI. 



C0NI0NTINI. 



TRIBE XI ANEPSIINI. 



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

 illae visible. Epistoma rounded in front, labrum entirely concealed. Middle coxae open 



