C<Aeopterolo[iiral Notices, VI. 461 



the tliorncic apex with the same part in Cradytes, where the 

 apical angles so prominent here are completelj' obliterated and 

 rounded, and the central portion of the apex correspondingly ad- 

 vanced, it would seem impossible to retain them all in the same 

 generic group. The prominent apical angles of Eudasytes reap- 

 pear feebly, however, in certain species of Trichochrous, and, in 

 Eudasytes ursinus these angles are rounded and but slighth' ad- 

 vanced; but, from the standpoint of epipleural structure, this spe- 

 cies would have to form a subgenus of Eudasytes, showing that 

 there may really be some correlation between the structure of the 

 epipleurae and form of the apical angles, at least in this particular 

 genus. 



The three species differ much among themselves and may be 

 readily known as follows : — 



Vestitiire pale; apical angles of the protliorax strongly advanced and not or 

 scarcely rounded ; epipleurte remaining horizontal to the extreme apex ; 

 legs pale. 

 Basal angles of the protliorax not prominent; erect sette of the elyti-a very 



short; body much broader 1 ampllis 



Bas;il angles laterally prominent ; erect setai long; body more elongate. 



2 obloiigiis 



Vestiture blackisli; apical angles feebly produced anteriorly and rounded; 



plane of the epi pleura? indexed toward apex; legs black 3 iirsiiius 



As far as known the species are distributed through the arid 

 region extending from Utah to southern California, and probably 

 do not occur in the true Pacific coast fauna. 



1. Ell. ailiplus n. sp. — Oblong, very stout, rather strongly convex, pol- 

 ished, black, without distinct metallic lustre ; legs pale, rufo-ferruginous, the 

 coxEe, tibiae and tarsi slightly obscure; femora slightly piceous along the ujiper 

 edge ; antenna? piceous, blackish to\\ard apex ; pubescence short, sparse, coarse 

 and cinereous, intennixed with very short and more erect pale liairs; marginal 

 cilia pale, moderate in length. Head sliglitly more than one-half as wide as 

 the protliorax, smooth, convex, finely and rather closely punctate, the im- 

 pressions long and distinct, confluent at apex behind a distinctly elevated 

 frontal margin; epistoma long, truncate, pale and coriaceous; labrum long, 

 blackish, rounded; eyesratlier large and somewhat prominent; antenna- rather 

 distinctly shorter than the prothorax, feebly incrassate, the penultimate joints 

 transverse, fifth scarcely preceptibly dilated. Prothorax large and convex, 

 fully three-fourths wider than long, the sides parallel and just \isibly arcuate, 

 becoming gi'adually strongly, evenly arcuate and convergent near the apex, 

 theai)ical angles greatly advanced anteriorly, right and scarcely at all rounded, 

 apex much narrower than the base, deeply eiuarginatc, transverse between the 



