OF WASHINGTON. 25 



Rostrum $ four-fifths as long as body, stout, moderately arcuate, 

 more strongly in apical half, distinctly enlarged at base and at apex; 

 a faint carina and punctuation barely indicated at extreme base; man- 

 dibles large and conspicuous, antennas inserted in apical third, scape 

 as long as next three joints. Thorax one-fourth longer than wide, 

 strongly arcuate near middle, rapidly narrowing toward apex. Elytra 

 three- fourthsi as wide as long, comparatively wide toward apex, 

 striae very fine. Femora not extending beyond elytra, strongly clavate, 

 tooth large and prominent, reentrant angle nearly right. Fifth ventral 

 segment concave in median third. 



Male. Rostrum less than two-thirds as long as body, a little more 

 strongly arcuate than in ?, enlarged at either extremity; mandibles 

 very large; antennae inserted well behind the middle. Fifth ventral 

 segment flat at middle, strongly bilobed at apex; pygidium produced 

 into a closed tube of long hairs. 



Dimensions. Length, 6.0-7.5 mm - 5 width, 2.8-4.0 mm. ; rostrum, $ 

 4.0-5.0 mm., <$ 3.5-4.0 mm. 



Habitat. Washington, D. C., June 3, September-October I 

 (E. A. Schwarz and others) ; Rosslyn, Va. (Chittenden) ; La 

 Plata, Md. (E. R. Sasscer) ; Allegheny, Pa. (Hamilton) ; Cole- 

 manville, Pa. (F. C. Pratt) ; Spring Lake Beach, N. J., Aug. 

 29 (Chittenden) ; Sandy Hook, N. J., New York, N. Y. (M. L. 

 Linell) ; Berkeley, R. I. (H. C. Fall) ; French Creek, W. Va. 

 (F. E. Brooks) ; Winston, N. C. (N. H. Willard) ; Rison, Ark. 

 (W. J. Hollis) ; Eudora and Little Rock, Ark. ; Victoria, Tex., 

 Sept. 29. 



Type. No. 11553, U. S. National Museum. 



In collections this species has been placed with nasicus and 

 quercus, from both of which it differs by the shorter and 

 thicker rostrum, with its enlarged apical extremity in the male. 

 From the former also it can be distinguished by the shorter 

 femora and more distinctly spotted character of the elytral 

 vestiture, nasicus being marmorate. Another important char- 

 acter by which it may be separated from quercus is in the male, 

 in which the abdomen is not produced into an open tube of 

 hairs. 



A large series shows considerable variation from the type 

 as regards length of rostrum and scape and color. Pale indi- 

 viduals are frequently found as with other species. 



This species has been reared in abundance by the writer 

 from acorns of Quercus bicolor, rclntina, and pednnciilata at 

 Washington, D. C., collected by various associates, and from 

 Quercus alba collected by Mr. F. C. Pratt at Colemanville, Pa. 

 Mr. Brooks writes that he has taken it abundantly at French 

 Creek, W. Va., on Q. alba also, and, rarely, on Q. priuiis. 



