426 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Legs moderate in length. F'eniora not densely punctate, the an- 

 terior mutic in both sexes: protibial spurs subequal; tarsi dissimilar 

 in the sexes. 



Male. — Elongate, Elytra twice to a little more than twice as long 

 as wide, arcuately and not suddenly declivous posteriorly. Abdomen 

 moderately convex and broadlj^ impressed on first three segments. 

 Posterior tibia^ more or less arcuate. First joint of the protarsi 

 somewhat produced at tip beneath, bearing a tuft of golden pubes- 

 cence, which obliterates the plantar groove at that point. 



Female. — Robust, often fusiform. Elytra broadly oval, often one- 

 half longer than wide, very suddenly arcuately or vertically declivous 

 posteriorly. Abdomen rather strongly and evenly convex. Posterior 

 tibia? not arcuate. Anterior tarsi unmodified. 



Measurements. — Males: Length, 27-35 mm.; width, 8.5-9.5 mm. 

 Females: Length, 25-30.5 mm.; width, 10-12 mm. 



Genital characters.^ male. — Edeagophore with the apex of the 

 apicale moderately wide and evenly rounded, slightly recurved in 

 apical fourth and punctulate above ; general surface feebly convex 

 although broadly depressed. Otherwise as in gu/antea. 



Female. — Genital segment with the general characters as in 

 gigantea. 



Valvula {Plate l,fig. 7). — Dorsal plate subfalcate, surf ace oblique — 

 facing upwards and outwards, quite densely and rather coarsely 

 punctate in apical half, each puncture Avith a very small decurved. 

 subrecumbent seta ; internal margin not strongly defined ; the internal 

 or pudendal surface of the valve very densely punctate and setose as 

 above, scarcely excavated below the apex. 



Appendage and fossa minute, feebly visible from above. Other- 

 wise as in gigantea. 



Haljitat. — Arizona (Kearn's District, Navajo Indian Keservation, 

 April, A. W. Barber; Peach Springs, July; Santa Rita Mountains, 

 June, Hubbard and Schwarz; Phoenix, collection E. C. Van Dyke; 

 Fort Grant, July, Hubbard and Schwarz; Tucson, JNIarch; Sulphur 

 Springs Valley, May, Hubbard and Schwarz; Oracle. July; (lalliuro 

 Mountains, May, Hubbard and Schwarz; P^ort Yuma. Prescott, June. 

 Barber and Schwarz) ; New Mexico (Las Vegas, August, collection 

 H. S. Bai'ber; Coolidge, Luna, Hubbard and Schwarz; Santa Fe, 

 collection C V. Riley) ; Colorado (Colorado Springs, June, Hubbard 

 and Schwarz; elevation 6,000-7,000 feet, Wickham; La Junta, 

 Southwestern (Strecker) ; Holly^ Fort Collins, San Luis Valley, and 

 Trinidad, WickhamV list); Texas (Marfia, July, elevation 4.600- 

 4.800 feet, H. F. AA'ickham; Alpine, July, elevation 4,400-(),000 feet) ; 

 Kansas (Western, Hubbard and Schwarz) ; Oregon ? (one specimen 

 bearing this state label in the collection of the U. S. National 

 Museum); Mexico (Northern Sonora, Morrison; San Luis Potosi; 



