TRIBE I. C'RYPHALINl. 623 



998 (_ _). XYLEBORUS vinuus Eich., 1878, 391. 



Described from male, locality doubtfully Brazil, the type received 

 through Kraatz from Germar, possibly of North American origin. Differs 

 by pronotum flat, anterior area not rugose but clothed with fine pubes- 

 cence, posterior area shining, distinctly punctured; elytral stria? obscure, 

 interspaces rugose; declivity with interspace 3 armed with three coarse 

 granules. Length 2.5 mm. 



Included by Hopkins as North American, on specimens from 

 Florida and District of Columbia; not mentioned in Swaine's 

 catalogue. 



999 (910G). XYLEBORUS CELSUS Eich., 18G7, 400. 



Sublinear, cylindrical. Brownish-testaceous, shining, with pale pub- 

 escence. Thorax oblong, faintly punctate behind. Elytra feebly punctate- 

 striate, fourth interval broader, almost biseriately punctate behind, others 

 uniseriately punctate, apex truncate, ret use, flat, smooth, with four larger 

 teeth near suture and smaller granules near edge of declivity. Length 

 4.5 mm. (EicJihoff.) Male, oblong-cylindrical, ferruginous. Pronotum 

 with sides subparallel, subacuminate to apex, which is obtusely produced, 

 anterior area flattened, faintlv impressed, rugosities fine, posterior and 

 lateral areas smooth, shining. Front subopaque, with median shining im- 

 pression. Elytra with strial punctures obscure, irregular, dorsal area 

 rugosely punctured toward vertex; declivity steep, flat, shining, with 

 interspace 1 broad and flat, armed with two teeth toward middle and one 

 on vertex, interspace 3 forming the lateral margin with three or four 

 small granules, posterior lateral margin obtuse, not serrate. Length, 

 male, 2.7 mm. 



Lawrence, Crawford and Posey counties. Ind. ; May 23 Sept. 

 8. Orange Mts. and Da Costa, X. J., June, at light and breeding 

 in hickory. Upper Darby, Pa., October, chopped from dead 

 hickory six or seven inches below surface. (Weuzcl.) District 

 of Columbia and Morgantown, W. Ya., in Hlcorla. The adults 

 excavate long, branching galleries in dying trees and logs of 

 hickory; bores in oak bark. (Packard.) 



This, according to Hubbard, is the largest American species, 

 and is found only in hickory. The galleries have a short entrance 

 passage, from the end of which radiate numerous branches, pen- 

 etrating deeply into the heartwood and promoting decay. The 

 galleries are blackened as if by fire. The ambrosia consists of 

 club-shaped stems, growing upright in dense clusters, tinged at 

 base with an umber brown discoloration. The .young and adults 

 live socially in the galleries and the pupse are formed lying' free 

 in the passages. The male was described by LeConte under the 

 name biographus. 



