106 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



anteriorly slightly tumid, vaguely concave, and nearly impunctate 

 behind each horn, with the upper median part of the prominence 

 angularly bent forward between the horns; anterior angles rounded, 

 not sharply angulate. Elytral striae shining, the strial punctures 

 barely indicated; intervals, excluding the sutural interval, irregularly 

 biseriately tuberculate, behind each tubercle a minute puncture 

 bearing a small yellow seta; sm-face between the tubercles finely 

 alutaceous. 



Pygidium with scattered, poorly delimited punctm-es, each bearing 

 a short yellowish seta; surface alutaceous, more so basally, becoming 

 smoother and dully shining apically. Ventral sm-faces brownish black 

 to black with mouth parts, antennae, and legs usually reddish brown. 

 Antennal club usually grayish brown, the apical segment largely 

 brown. Ventral portions of the thorax with scattered coarse punc- 

 tures each bearing a slender, reddish seta; sm-face between finely alu- 

 taceous except medially on the metasternum where it is smooth and 

 impunctate. Abdominal segments alutaceous and, except for the 

 first segment, with a row of vague punctures across their bases, the 

 punctm-es usually bearing short reddish setae; last abdominal segment 

 reddish brown in color, broadly emarginate to receive the pygidium. 

 Forelegs not noticeably longer than those of the female, the tibia being 

 slightly more slender but not elongated, its flattened outer surface with 

 finely alutaceous sculpture and scattered coarse punctures. Middle 

 and hind femora with scattered coarse punctures bearing short 

 reddish setae. 



Male minors. — Length 5.5 mm., width 3 mm. Differing from 

 the male majors in the following respects: Clypeus only slightly 

 reflexed, anteriorly distinctly emarginate with the disc rugosely punc- 

 tate; punctures more crowded and smaller than in the male major, 

 clypeal carina still vague, but slightly elevated medially; carina of 

 vertex discernible between the lateral horns which are reduced in 

 length and farther apart. Pronotum less convex, the tubercles more 

 widely separated, the anterior tumosity small, indicated by a small 

 arcuate ridge with anterior face tuberculate-punctate and only slightly 

 or not at all concave behind the reduced horns; pronotum anteriorly 

 not extended forward between the horns, anterior angles more angu- 

 late. Elytra and pygidium mostly as described for male majors; 

 ventrally the major differences are in the color and the setal length, 

 the ventral color of the male minor being reddish brown, the legs and 

 mouth parts being only slightly lighter, and the ventral setae ap- 

 pearing to be reduced in length. General aspects of the legs appear 

 similar to those of the male major. 



Females. — Length 5.4 to 6.1 mm., width 3.4 to 3.9 mm. Differing 

 from the male majors in the following respects: Clypeus scarcely 



