REVISION OF ELEODIINI BLAISDELL. 287 



Valvula. — Dorsal plate more or less oblong, glabrous and shining, 

 sides very strongly reflexed; surface deeply concave, very finely, 

 sparsely punctate and finely setose; external border rather strongly 

 arcuate; internal margin more or less sinuous; apical margin promi- 

 nent, evenly and moderately arcuate, angle rounded. Apex short 

 and triangular; valvular membranes strongly exposed between the 

 apices caudad to the pudendal membrane. 



Appendage subsemielliptical, rather equal in length and size to 

 the apex. Appendage, apex, and margin of the fossa finely punctate 

 and setose, setse short and inconspicuous. 



Superior pudendal memhrane attaining the middle of the dorsal 

 plate and longitudinally rugulose. 



V entrolateral surfaces. — Body moderately inflated and glabrous, 

 transversely and broadly concave before the apices, the latter finely 

 punctate and setose. Submarginal groove more or less obsolete. In- 

 ternal margins of the valves contiguous in basal third ; genital fissure 

 narrowly fusiform and closed in basal half by the visible inferior 

 pudendal membrane. 



Habitat. — Mexico (Sinaloa, coll. Chas. Fuchs; Alamos, Buchau- 

 Hepburn ; Presidio, Forrer). United States (Texas). 



Number of species studied, 5 (8?). 



Tyi^e is probably with the Solier collection. 



Type-locality.— ^{.Q-iiico (Alamos?). 



Salient type-characters. — Thorax quadrate; disc very finely punc- 

 tulate ; apex feebly emarginate ; apical angles subacute and slightly 

 prominent anteriorly ; .sides evenly but not strongly arcuate ; basal 

 angles obtuse. Elytra striato-punctate, punctures moderate and 

 closely placed in the series, intervals scarcely convex and with a 

 series of rather distantly spaced punctules; caiida horizontal. 



Diagnostic cliaracters. — The figure given in the Biologia I take 

 to represent what is probably a tyjiical form of this species. I can 

 not see that it differs very much from some of the less strongly de- 

 veloped forms of lucm. The prothorax is quadrate, with the sides 

 feebly and evenly rounded from base to apex; apical margin feebly 

 emarginate, angles small, acute, and just feebly prominent anteriorly. 



In the specimens before me the sides of the prothorax are rather 

 less rounded, ajoical margin very feebly emarginate or truncate and 

 the apical angles scarce!}^ at all ])romincnt. The general form of the 

 body is rather more slender, with outline more evenly fusiform. The 

 Cauda narrows somewhat to tip. 



I do not believe that a large series could be separated from a simi- 

 larly large series of luca\ 



In a series of five examples (4 males and 1 female) mentioned 

 in the Biologia, the largest male measures 35 mm., including the 



