58 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Male. — Body moderately narrow, elongate-ovate. Elytra moder- 

 ately narrowed in posterior fourth. Otherwise as in am phi. 



Female. — -Moderately robust. Elytra less gradually narroAved in 

 the posterior fourth. Otherwise as in ampla. 



Measurements. — Males : Length, 18-21 mm. ; width, 7-7.5 mm. 

 Females: Length, 21 mm.; w^idth, mm. 



Genital charaeters, male. — Edeagophore scarceh^ at all arched. 



Basale elongate and suboval. 



Apicale elongately triangular ; surface extremely sparcely and finely 

 punctulate. 



Stternite somewhat transverse. Each lobe triangulo-quadrate, with 

 the external border l)roadly and feebly sinuate at basal three-fourths, 

 thence arcuate to apex, the latter more or less rounded ; internal 

 border short and oblique. Otherwise as in ampla. 



Female. — Genital segment quadrate. 



Valvula. — Dorsal plate scarcely concave. 



Appendage very small. 



Ventrolateral surface quite l^roadly concave before the apex. 

 Otherwise as in ampla. 



Habitat. — Arizona (along the Colorado River, Beverly Letcher). 



Number of specimens studied, 7. 



Sexitypes in my own collection. 



Type-locality. — Western Arizona. 



Calient type-cliaracters. — More or less shining, elongate-ovate. 

 Pronotum cjuadrate, polished, widest at the middle. Elytra striato- 

 punctate, strial punctures not impressed (male) or feebly impressed 

 and coarser (female). Legs long. 



Diagnostic characters. — In surface lustre and sculpturing i-esembles 

 carhonaria ; by its larger and more elongate form and long legs it is 

 most closely related to ampla. 



Mr. Blancharcl writes me that it is not to be referred to any species 

 in the LeConte collection. It has heretofore been referred to car- 

 honaria., but the long legs will quickly separate it from that species. 



A specimen in Mr. Blanchard's collection has the sides of the pro- 

 notum more strongly arcuate. 



The mental, sternal, abdominal, and crural characters are practi- 

 cally the same as in (tmpla. The anterior tarsi are apparently less 

 elongate in the male, and in both sexes for (hat matter; in the female 

 joints two, three, and four are comparatively a little smaller. 



ELEODES OBSOLETA (Say). 



B\aps ohsnieta Say. Journ. Acad. Nat. Sci. Pliila., Ill, 1823, p. 261.— 

 LeConte, Complete Wiitiiijis of Thomas Say. II, 1859, p. 153. 

 EU'oclcs ohitolctd Horn, Trans. Amor. Phil. Soc, XIV, 1870, p. 30S. 



EleodCN obsolcta var. inncatn CASf:Y, Ann. New York Acad. Sci., V, Nov.. 

 1890, p. 396. 



