230 



Femoral tooth obtuse ; pubescence intermixed with 



bristles 13. naso. 



c. Humeri not dentiform; beak shorter, strongly striate; 



antennae inserted about one-third from the tip. 

 Ventral segments nearly uniformly punctured. ....... 2. 



" " sparsely, fifth finely and densely 

 punctured; prothorax sparsely cribrate, elytra with 

 large, white markings 18. plagiatus. 



2. Mesosternum flat, declivous 3. 



" prominent ; prothorax densely and 

 coarsely punctured 14. posticatus. 



3. Prothorax plicate towards the middle 4. 



" uniformly cribrate 15. geminatus. 



4. Plicae approximate; pubescence short 16. infector. 



" coarser, and more reticulate, pubescence mixed 

 with longer bristles 17. cribricollis. 



10. O. crataegi Walsh, Proc. Bost. Soc. Nat. Hist, ix, 1863, 311. 

 New York, Georgia, Illinois. The form is broader and more squat than 



in any other of our species, and it is easily distinguished by the humeri 

 being obliquely truncate, with the outer angle dentiform; this appearance 

 is produced by a short carina between the third and fourth elevated ridge 

 of the elytra, which meets the fourth ridge at an acute angle. The beak is 

 punctured and very deeply striate; head densely punctured; prothorax 

 carinate, elevated at the middle, broadly transversely impressed in front, 

 densely and finely cinereous pubescent, with an indistinct pattern of paler 

 pubescence each side, meeting in front of the middle. The elytra are 

 clothed with dirt-colored, slightly mottled, fine pubescence, with rows of 

 short, whitish setae; the third, fifth, seventh and ninth interspaces are 

 strongly carinate, leaving broad furrows, each marked with two rows of 

 quadrate punctures. The body beneath is thinly clothed with yellowish 

 pubescence, sparsely punctured and cribrate; the third and fourth ventral 

 segments still more sparsely, and the fifth rather densely punctured. Thighs 

 armed with a large, not very acute tooth. The middle coxae are more 

 widely separated than in the other species. Length 5 mm. ; .20 inch. 



The beak of the female is a little longer and less deeply striate than in the 

 male; the last ventral segment in both sexes is foveateeach side, and feebly 

 impressed at the middle near the tip; but these impressions are broader in 

 the female. 



It is G. humeralis |Dej. Cat. 



11. O. adspersus, n. sp. 



Black, robust, clothed with very short, prostrate scale -like yellow pubes- 

 cence, with lines on the prothorax, and dots on the elytra of white pubes- 

 cence. Beak half as long as the body, slender, slightly curved, punctured, 

 not striate. Prothorax as long as wide, gradually narrowed in front from 

 the base, feebly rounded on the sides, slightly constricted in front; slightly 



