TRIBE XVIII. BARIXI. 393 



XIX. CENTRIXITKS Casey, 1892. (Gr., Centrums + "like.") 



Small, rhomboid-oval species having the mandibles deeply 

 notched within near apex; beak as long as head and thorax, its 

 dorsal surface polished and snbcarinate, with an even row of 

 small punctures each side of the smooth raised line; antenna' in- 

 serted beyond its middle, the scape reaching three-fourths to eye, 

 basal joint of funicle as long as the next three, second one-half 

 longer than third, the outer joints finely pubescent like the club; 

 elytra at humeri distinctly wider than thorax, their sides strongly 

 converging to the narrowly rounded apex; prosternum impressed 

 along the middle, very narrowly separating the coxa-. 



600 (11,178). CEKTRIXITKS STRIGICOLLIS Casey, 1892, 616. 



Rhomboid-oval. Black or dark reddish-brown, shining; tibia?, tarsi 

 and antennae more or less piceous; above thinly clothed with elongate, 

 slender white and piceous scales, the former condensed along the sides 

 and on the ba?al lobe of thorax and also on elytral intervals two, near 

 base and towards apex, four and six broadly, and three, five and seven 

 in single sparse lines which are less distinct towards base and apex; 

 under surface rather sparsely clothed with white scales. Beak with 

 sides flattened, densely and rugosely punctate. Thorax two-thirds wider 

 than long, sides feebly converging from base to apical third, then strong- 

 ly rounded to the constriction; disc strigose and with finely carinate 

 median line. Elytral intervals flat, twice as wide as striae, the first, 

 third, fifth and seventh with a single row of punctures, the others con- 

 fusedly punctate. Length 3.5 mm. 



Frankfort, Ky., June 9. Known from Hot Springs, N. C., 

 Ohio and Missouri. Taken by Robertson on the bunch-flower, 

 MelantMum virginiciiiii L. and as a pollen feeder on Trillium 

 sessile L. (Pierce.) 



XX. OOMORPHIDIUS Casey, 1892. (Gr., "egg" + "form.") 



Distinguishable by an oval, extremely convex and subglabrous 

 body; rather long, moderately stout, curved beak; strongly tubu- 

 late thorax; rather robust legs, the femora somewhat curved. 



GOl (8914). OOMORPHIDIUS LEVICOLLIS Lee., 187G, 304. 



Oval, convex, strongly narrowed behind. Dark reddish-piceous, 

 shining, minutely alutaceous; elytra black, legs reddish-brown; above 

 very sparsely clothed with linear white scales. Beak stout, as long as 

 head and thorax, finely and sparsely punctured. Thorax short, twice 

 as wide as long, very convex, strongly narrowed in front, sides feebly 

 curved, very strongly constricted about one-fourth from apex, the con- 

 striction forming a deep, narrow groove extending completely across 

 the dorsal surface; base broadly rounded; disc very finely and sparsely 

 punctate, its lateral edge nearly acutely defined. Elytra not narrower 



