228 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Luna, Hubbard and Schwarz) ; Arizona (Adamana, May, H. S. Bar- 

 ber; Winslow, July, Coll. Barber and Schwarz; Holbrook, Coll. E. C. 

 Van Dyke, Charles Fuchs, and Beverly Letcher) ; Colorado (Henry 

 Ulke; Eastern, George Horn); Texas (El Paso, March, Coll. H. 

 Soltau). 



Number of specimens studied, 40. 



Type in the LeConte collection. 



Type-locality. — New Mexico; collector, Mr. Fendler. 



Salient type-characters. — Thorax scarcely convex, slightly punc- 

 tate, laterally a little concave and transversely rugose; anteriorly 

 broadly emarginate, apical angles not acuminate; sides strongly 

 rounded, narrowed posteriorly; posterior angles obtuse. Elytra 

 slightly flattened, substriate with seriate punctures, intervals uni- 

 seriately and sparsely punctate, at the sides and apex muricate, pos- 

 teriorly obliquely declivous and prolonged. Anterior femora mutic 

 (female) (LeConte). 



The following forms are before me : 



Forma glabra. — More or less shining and glabrous, not at all muri- 

 cat, except on the cauda. Elytra striate, stride impressed, with quite 

 coarse and closely placed punctures; intervals moderately convex, 

 with a single series of small, distantly placed punctures. Legs quite 

 slender. Cauda gradually narrowing from base to apex. 

 • Measurements. — Male: Length, 25 mm.; with cauda, 31 nnu. ; 

 width, 9.5 mm. Female : Length, 20 mm. ; with cauda, 22.5 mm. ; 

 width, mm. 



Ilahitat. — Texas (El Paso), Arizona. 



Forma sublasvis. — Subopaque to feebly shining. Antennae slender 

 and rather long. Elytra with series of unimpressed punctures; in- 

 tervals flat with a series of distantly spaced punctures, which are as 

 large as those of the striae. Sculpturing submuricate. Legs rather 

 slender. 



Measurements. — Female: Length, 25 and 28 mm.; width, 10 mm. 



Hahitat. — Arizona. 



Forma typica. — See salient type-characters. 



Forma scabra. — More or less shining. Elytra with unimpressed 

 striic of very closely placed and minute nuiricate tubercles; intervals 

 with a single series of distantly placed and larger muricate tubercles, 

 which become distinctly larger laterally and more tuberculiform. In- 

 flexed sides of the elj^ra rugoso-muricate. The general surface is 

 very minutely rugulose. Size of forma typica. Legs rather short. 



Ilahitat. — New Mexico (Aztec). 



Diagnostic characters. — Both sexes are caudate. Thorax widest 

 just in advance of the middle; body not noticeably pubescent, tibia) 

 and tarsi wnth long fljnng hairs. Thasc chai-acters serve to differen- 

 tiate caudifera from sponsa, hispilahris, and long'tp'dosa. 



