AMERICAN COLEOPTERA. 413 



the posterior femora oecurs also in other members of this subtrihe, 

 notably in Acanthoscelis, and also to a less extent in Folenosotnus, 

 without, however, attaining anything to what we find in the present 

 genus. But two species are known to me, which are distinguished 

 as follows : 



Protliorax not pibhous. elytni with cnieifonn spot of pale scales. PL xii, fip. 17. 



llkoi. 

 Prothorax gihlioiis. no cnieifonn clytnil sjiot. PI. xiii, figs. 18 and 18(f. 



Wickliaiiii. 



O. Ulkei n. sp. PI. xii, figs. 17. 17«. — Oval, pitchy brown, antenna; and feet 

 testaceous, above sparsely clothed with fine, white piliform scales, underside with 

 similar, though somewhat larger scales. Beak cylindrical, striate and punctured 

 toward the base, pubescent throughout, antennse slender, inserted at the middle 

 (% ), funicle 7-.jointed, first joint stout, second slender and longer than the first, 

 joints 3-4 equal, outer joints gradually wider, club elongate, acuminate. Head 

 closely punctured, squamous, front slightly concave ; prothorax nearly one-half 

 wider than long, broadly rounded on the sides and gradually narrowed from 

 base to apex, latter scarcely constricted, transversely impressed in front, ocular 

 lobes prominent, distinct, apical mai-gin feebly emarginate at the middle, obtusely 

 bicuspidate, lateral tubercles distinct, not acute, dorsal channel well impressed in 

 its basal half, gradually narrowed anteriorly and becoming obsolete in front, an 

 obtuse elevation each side about the middle, between this elevation and the lateral 

 tubercle, there is an oblique impression, surface closely punctured, {junctures 

 large, especially near the base, the latter emarginate each side, a spot of white 

 scales in front of each lateral tubercle. Elytra convex, about as long as wide, 

 nearly one-third wider at the base than the prothorax, humeri oblique, rounded 

 on the sides and narrowed posteriorly ; strife deep, wide, closely and distinctly 

 punctured, interspaces convex, alternately wider, punctured ; a conspicuous, 

 cruciform scutellar s]>ot of whitish scales, humeri white, disc with ill-defiued 

 spots and bands of condensed white i)ubescence, niesosternum exciivate; femora 

 deeply sulcate, posterior flattened, broadly dilated, broadly impressed near the 

 apex ; tibia; parallel, subangulate near the base, less so on the anterior pair, mid- 

 dle and posterior tibiae emarginate externally above the apex, tarsi moderately 

 stout, third joint broadly bilobed, fourth rather short, claws armed with a long 

 acute tooth. Length 2.7 mm. ; 0.11 inch. 



% . Last ventral segment with transverse apical fovea, middle and posterior 

 tibiie unguiculate at the apex. 



Hub. — New York. 



A male specimen in Mr. Ulke's coll., to whom it gives me pleasure 

 to dedicate this species. The specimen before me presents a peculiar 

 aberration, the anterior and middle femora on the left side are quite 

 slender, scarcely clavate, while those on the right side are flattened 

 and impressed near the apex, similar to the posterior jiair. I feel 

 at a loss as to what is normal and what otherwi.se. Should further 

 specimens prove the latter condition to he the normal one, I would 



TEANS. AM. KNT. SOC. XXIU. NOVEMBEE. 1M9« 



