114 PROCEEDINGS OF THE NATIONAL MUSEUM vol. n4 



Elytra and pygidium similar to those of male major. Ventrally 

 the metathorax shows fewer coarse punctures; otherwise ventral sur- 

 faces resemble those described for male majors. Forelegs shortened, 

 the apices of anterior femora not extending quite as far as lateral mar- 

 gins of thorax; foretibia proportionately shortened but still slender, 

 inwardly curved, and lacldng the apical conical projection above the 

 tibial spine. Aliddle and hind legs slightly more stocky than in 

 male majors but otherwise similar. 



Females. — Length 4.9 to 7.7 mm., width 3 to 4 mm. Differing 

 from the male majors in the following respects: Dorsal color of 

 greener blue, often less noticeable; clypeus rather evenly rounded, 

 slightly more reflexed anteriorly than laterally, with disc coarsely 

 rugosely punctate, each puncture bearing a long, thin seta; clypeal 

 carina similar but more pronounced medially, the frons between 

 clypeal and frontal carinae moderately tuberculate, with long, yellow- 

 ish setae arising from punctures at the anterior base of each tubercle; 

 frontal carina pronounced and at least as high as median portion of 

 clypeal carina, often slightly indented near midline but without any 

 indication of lateral horns, a few setigerous tubercles behind. 



Pronotum less convex than in male majors, with shining tubercles 

 distributed quite evenly over the entire surface, the base of each tu- 

 bercle with a slender, reddish-yellow seta; tubercles slightly larger than 

 those of the male, separated by approximately their own diameter; 

 setae shorter and finer, less conspicuous than in male; pronotal pro- 

 tuberance in some specmiens indicated by only a vague hump, in 

 others the lateral edges delimited by a shiny round swelling, the 

 distance between these swellings approximately the same as the 

 length of the frontal carina of the head. Elytra generally similar to 

 those of male, but with the tubercles slightly larger and the setae 

 slightly shorter. 



Pygidium slightly less convex than in male but otherwise quite 

 similar. Ventral surfaces generally similar to those in male with the 

 exception of the last abdominal segment which is not emarginate. 

 Legs generally stockier with apex of forefemora not extending to the 

 lateral thoracic margins. Fore tibiae not at all elongate, being short 

 and rather stocky with no conical projection over the tibial spine, 

 the tibial spine fairly slender and inwardly curved in apical half. 



Type. — Canadian National Collection 297 L 



Type locality. — Payne County, Okla. 



Specimens examined. — 250. 



Distribution. — (See fig. 10, p. 100.) 



Arkansas: Boone Co. Kansas: Liberal, Medora. Louisiana: Alexandria, 

 Vowells Mill. Oklahoma: Cleveland Co., Latimer Co., Payne Co., Ripley, 

 Stillwater, Tulsa. Texas: Bastrop State Pk., Brady, Brazos Co., College Sta- 



