48 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



midline with a small tubercle at their anterior margins; tubercles, 

 setae, and punctures most pronounced anteriorly and laterally. 

 Elytra with well-defined striae ; all intervals except the sutural interval 

 and the anterior portion of the second and fourth intervals irregularly, 

 biserially punctate-tuberculate, the punctures bearing fine, whitish 

 setae ; surface between tubercles smooth and shining, not alutaceous. 



Pygidium usually coarsely, setigerously punctate. Ventral sm'face 

 of metasternum laterally alutaceous and coarsely, setigerously punc- 

 tate, medially with only fine secondary punctures except for a few 

 large posterior ones and a shallow, longitudinal indentation. Abdom- 

 inal segments coarsely, shallowly punctate laterally, the punctures 

 becoming obsolete medially; last segment emarginate medially to re- 

 ceive pygidium. Legs piceous to brown with a greenish luster. Fore- 

 legs with femur and tibia longer than in female, the distal end of the 

 femur extending to the lateral margin of the thorax; tibia with four 

 large lateral teeth with serrate margin between and a conical, apical 

 tooth above the short intiu-ned tibial spine. Femora of mesothoracic 

 and metathoracic legs with scattered coarse punctures and a few very 

 fine punctures on their ventral surfaces. 



Male minors. — Length 5.1 to 7.3 mm., width 3.2 to 4.3 mm. Usu- 

 ally smaller than male majors or females, differing from the former in 

 the following respects: Clypeus reflexed only slightly more anteriorly 

 than laterally; clypeal carina distinctly indicated; carina of the vertex 

 usually complete, highest laterally, indicative of the conical tubercles 

 above the eyes in male majors. The pronotal protuberance in the 

 smallest specimens reduced to a small hump resembling that of a 

 female, but slightly narrower in width. Forefemora and tibia not 

 greatly elongate, the tibia with only a trace of the apical conical tooth 

 over the tibial spine which is still short and stubby, not as elongate as 

 in females. 



Females. — Length 5.2 to 8.0 mm., width 3.7 to 5.0 mm. Differing 

 from the male majors in the following respects: Clypeus evenly arc- 

 uate, shallowly emarginate anteriorly, and faintly to moderately 

 reflexed; disc very coarsely, rugosely punctured, much more so than in 

 males; both carinae of clypeus and vertex pronounced, the latter being 

 more pronounced and slightly higher medially; frons, before the carina, 

 slightly more coarsely punctured than in male and often with scattered 

 secondary punctures. Pronotum with the anterior process evidenced 

 by a rounded, broad hump often angulate and pronounced laterally, 

 the swelling not extending over the anterior margin. Elytra and 

 pygidium similar to those of male but with punctures at base of tuber- 

 cles on elytra often more pronounced. Prothoracic legs not elongate, 

 the apical end of the femiu" not extending as far as the lateral margin 

 of the pronotum; tibia proportionately shortened, laterally with four 



