124 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



approximately equal to their diameter, and with an extremely short 

 seta in the center of each puncture; laterally the setae becoming longer, 

 usually quite evident near the anterior angles; anteriorly the punctures 

 becoming more crowded and raised along their anterior edges, a tuber- 

 culate appearance produced; surface between the punctures very 

 finely alutaceous. Elytral striae shallowly punctate ; intervals, except 

 for the sutural one, generally irregularly biseriately tuberculate, with 

 a short, tan seta at the base of each tubercle; elytral surfaces weakly 

 shining, finely alutaceous between the striae and tubercles. (Al- 

 though the amount of black and tan mottling on specimens ranges 

 from largely tan elytra to black elytra with occasional tan spots, there 

 is usually more tan than black.) 



Pygidium coarsely, shallowly punctate; each puncture bearing a 

 short, tan setae ; surface between the punctures finely alutaceous. Ven- 

 tral surfaces of thorax coarsely punctate except at impunctate midline 

 of metathorax; most of the punctures bearing long, reddish setae. 

 Abdomen largely impunctate except for a few scattered basal punc- 

 tures on the last three segments, last segment emarginate to receive 

 the pygidium. Forelegs not elongate, similar to those of female except 

 that the four tibial teeth are more slender; outer surface of foretibia 

 coarsely punctate. Mesothoracic and metathoracic femora with 

 scattered coarse and fine punctures, the coarse ones usually bearing 

 setae. 



Male minors. — Length 6.3 mm. to 6.8 mm., width 3.6 to 3.8 mm. 

 Differing from the male majors in the following respects: Clypeus less 

 extended, disc and frons more heavily punctate, the punctures often 

 bearing reddish setae; clypeal carina barely evident as in male major; 

 carina and horn of vertex greatly reduced in height. The carina with 

 a truncated low triangular shape when viewed frontally, the median 

 cylindrical horn barely indicated. Pronotum less convex, barely 

 tumid anteriorly, the tumosity with few punctures and flat but not 

 concave to receive the horn; setae more evident in male minor, being 

 longer on the disc than in the male major. Elytra, pygidium, and 

 ventral surfaces similar to those of male majors. 



Females. — Length 6.3 to 8.0 mm., width 3.4 to 4.5 mm. Differing 

 from the male majors as follow: Clypeus less elongate, shallowly 

 emarginate, rather closely punctate, often finely rugose posteriorly; 

 clypeal carina pronounced, arcuate, evenly elevated, and extending 

 the width of the frons; gena delimited from the clypeus by a faint 

 suture, frons behind clypeal carina with scattered, coarse, setigerous 

 punctm'es; frontal carina very strong, evenly elevated, extending to 

 posterior margin of the eyes; posterior surface of carina with scattered, 

 coarse, setigerous punctures. 



