EEVISTON OF ELEODIINI BLATSDELL. 209 



two-thirds, setose, setse dense at tip and rather long. Membrane not 

 setose across the bottom of the narrow sinus. 



Female. — Genital segment triangulo-trapezoidal, rather robust, 

 comparative!}^ small and setose. 



Valvuld (Plate 1, fig. 8). — Dorsal plate oblong, glabrous; surface 

 broadly concave, more deeply so along the strongly reflexed inner 

 side, sparsely punctate, each puncture with a long flying seta ; exter- 

 nal border rather straight, and the internal somewhat sinuous: 

 apical margin truncate, angle quite rectangular and set with quite 

 long setse. Apex rather short, semi-chitinous and finely setose, with 

 a tuft of rather long setse at tip. Fossa large and fringed with rather 

 long setae. 



Ajyjyendage conical, truncate, moderate in size and setose, with a 

 loose pencil of hairs at tip. 



Basal prominences rather strongly developed. 



SwpeTioT pudendal niemhrane not reaching to the middle of the 

 dorsal plate. 



V entrolateral surfaces rather strongly and transversely prominent 

 in the basal moiety, broadly and rather deeply concave before the 

 apex; apical region punctate and rather thickly set with quite long 

 flying seta\ Submarginal groove feeble. Internal margins of the 

 valves contiguous in basal fifth. 



Forma typica. — flahitat.— Central California (San Francisco, Van 

 Dyke; Marin County, Charles Fuchs; Calaveras County, elevation 

 2,000 feet, F. E. Blaisdell ; Monterey County ; Tulare County, Ralph 

 Ho])ping) . 



Forma valida. — Southern California (San Diego, Los Angeles, 

 Monterey, San Bernardino, and Kern counties) ; Arizona (Yuma 

 Desert, March: Santa INIaria River). 



Lower California (San Jose del Cabo; Lower Paraiso ; San Pedro 

 Martir). 



Number of specimens studied, 59. 



Location of type unknown to me. 



Type-locality. — " California " (Mannerheim). 



Salient type-characters. — Elongate, convex, and shining. Head 

 deeply punctate. Thorax with sides strongly rounded, margin re- 

 flexed, finely punctulate. Elytra oblong, moderately narrowed each 

 side of the apex, obsoletely striato-punctate. Anterior femora den- 

 tate (Mannerheim). 



Diagnostic characters.- — The only species in the subgenus with obso- 

 lete humeri. One of our largest and finest species, very distinct and 

 with obscure relationships. I believe that a study of the Mexican 

 species is necessary before much light can be thrown upon the origin 

 of not only grandicollis and. dentipes.^ but arrriata. 

 59780— Bull. 63—09 14 



