120 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 65 



tate, the punctures rather shallow, irregular, and nearly confluent, 

 the sides forming a network of polygonal areas, bottom of the punc- 

 tures granulose, and from the center of which arises an inconspicu- 

 ous white hair; eyes large, strongly convex, more acutely rounded 

 at bottom than on top, and separated on the occiput by about one- 

 third the distance between the antennal cavities; epistoma large, 

 broadly and very deeply triangularly emarginate at middle, the 

 anterior margin strongly angulated on each side of the emargi- 

 nation ; antennae greenish at base, becoming aeneous toward the tip, 

 third joint about equal in length to the following three joints united. 

 Pronotum strongly transverse and moderately convex, one and one- 

 half times as wide as long, widest near the apical angles, then feebly 

 obliquely narrowed to the posterior angles, which are not very 

 acute; anterior margin arcuately emarginate, with a broadly 

 rounded, obsoletely median lobe; base deeply emarginate at middle 

 of each elytron, with a broadly rounded median lobe, which is 

 feebly truncate in front of scutellum; surface evenly convex, with- 

 out impressions, coarsely transversely rugose, and finely, rather 

 sparsely, punctate, the punctures elongate and widely separated, the 

 intervals very finely granulose. Scutellum triangular, the sides 

 equal in length and the surface granulose. Elytra distinctly wider 

 than pronotum at base, feebly angulated at humeral angles, then 

 feebly sinuate and nearly parallel to near the middle, where it is the 

 widest, and then arcuately attenuate to the tips, which are separately 

 and rather broadly rounded; lateral margins very strongly serrate 

 to near the middle; base moderately lobed; surface without costae, 

 but with a deep transverse impression along the base, rather coarsely 

 and densely punctate, the punctures elongate and rather widely 

 separated; intervals finely and densely granulose. Abdomen be- 

 neath coarsely and sparsely punctate; last segment with the lateral 

 margins entire, with a serrate submarginal ridge, and truncate at 

 apex; with a small deep emargination at the lateral sides, forming 

 an acute tooth at the outer edge. Prosternum broadly lobed in 

 front, surface more coarsely and densely punctate than abdomen. 

 Femora robust; anterior pair with a strong acute tooth on their 

 outer edge near the middle, serrate on its exterior margin. Anterior 

 tibiae slightly arcuate, with a distinct dilatation near the middle; 

 middle and posterior pairs straight. 



Female. — Differs from the males in having the front of head pur- 

 plish, with the bottom of the punctures and margins along eyes 

 slightly bronzy, and the punctures on front more widely separated, 

 causing the intervals to be wider and obsoletely granulose, antennae 

 aeneous with a strong purplish tinge ; elytra more strongly angulated 

 and sinuate near the humeral angles ; beneath uniformly greenish-black 



