REVISION OF ELEODIINI BLAISDELL. 303 



Habitat . — Texas (Brownsville, Charles Drury, H. F. Wickham; 

 Uvalde, Wickham; AVades, Alice, and San Diego, Hubbard and 

 Schwarz, collection U. S. National Museum). Mexico (coll., F. 

 Bates). 



Number of specimens studied, 15. 



Type in the LeConte collection. 



Type-locality. — Texas, near the Kio Grande River. 



Salient type-characters. — Thorax finely punctate, anteriorly mod- 

 erately and posteriorly slightly narrowed; sides rounded; anterior 

 angles acute; base broadly rounded, humeri scarcely acute. Elytra 

 striato-punctate, intervals uniseriately punctulate (LeConte), 



Diagnostic characters. — Quickly recognized by its robust form, the 

 elytra being strongly ventricose in both sexes, moderately caudate in 

 the males, the cauda being oblique and not horizontal ; in the females 

 the elytral apex is slightly produced. 



The apical angles of the prothorax are distinct and not dentiform ; 

 the basal are rather broadly rounded, the angles may be sometimes 

 feebly evident ; the sides narrowing moderately anteriorly. 



As LeConte writes the punctures composing the stride of the elytra 

 vary very much in size ; sometimes they are very large, while at others 

 they are hardly different from the more distant interstitial punctures. 



Two examples in the series before me have the elytral intervals per- 

 fectly flat and the striae not in the least impressed. 



The antennae are noticeably feebly clavate on accoinit of the joints 

 one to eight, inclusive, being elongate and retaining the same Avidth 

 throughout, while joints nine to eleven, inclusive, are slightly widened 

 at the middle and more or less transverse. The same structure is 

 observed in eschscholtzii and lucre., only that the eighth joint is also 

 feebly widened. This may also be the case in ventrlcosa. 



This species is separated from Iuccb forma infata by the basal 

 angles of the prothorax in the latter being obtuse, distinct, and not at 

 all rounded. 



See var. /'«ZZ^, p. 306. 



General characters. — The mentum is large, more or less trapezoidal, 

 rarely subquadrate ; apex truncate or feebly arcuate, slightly reflexed, 

 and frequently impressed at middle so as to appear more or less emar- 

 ginate; surface coarsely punctate, setae very short, subfoveate at the 

 basal angles ; inflexed lobes rather stout. 



The prosternum is quite variable. Convex between the coxae, with 

 which it is quite strongly protuberant ventrally and also moderately 

 short before the acetabula ; compressed and perpendicularly truncate 

 behind, rising into a small mucro at the ventral angle ; at times sub- 

 truncate behind, with a moderate mucro, at others rounded and not 

 at all mucronate. 



