NORTH AMERICAN BOSTRICHIDAE 125 



Abdomen beneath sparsely, indistinctly punctate, rather densely 

 clothed with short, recumbent, whitish hairs, the hairs longer on last 

 visible sternite, which is slightly longer than preceding sternite, and 

 broadly subtruncate at apex. 



Female. — Differs from the male in having the apical declivity of 

 the elytra more coarsely punctured, especially toward the sides, and 

 the last visible abdominal sternite twice as long as the preceding 

 sternite. 



Length 3.75-5.5 mm., width 1.4-2 mm. 



Type localities. — Guanajuato, Mexico, and Lower California; types 

 in the Paris Museum. ''Mexico"; type was in the Berlin Museum. 



Distribution. — From material examined : 



Arizona: Sabino Canyon, reared in large numbers from mesquite (Prosopis 

 juliflora (Swartz) de Candolle) (G. Hofer). Tucson, April 21, 1894, adults 

 boring in lemon twigs (J. W. Tourney). 



Hosts. — This species has been intercepted a number of times at 

 JSogales, Ariz., in dry bamboo canes from Mexico. It has been found 

 infesting bamboo {Anmdinaria longifolia) from Mexico in storage at 

 Hoboken, N. J., during September 1944. 



Lesne (1901) described pari! is from three specimens, one in the 

 Berlin Museum labeled Mexique, and two females from Guanajuato, 

 Mexico, and Lower California, in the Paris Museum, but in his Cata- 

 logue (1938) only listed this species from Mexico. 



Xylobiops tex anus (Horn) 



Sinoxylon texanum Horn, 1878, Amer. Phil. Soc. Proc. 17: 542, 543; Schwarz, 



1888, Insect Life 1 : 162 ; 1890, Ent Soc. Wash. Proc. 1 : 177. 

 Xylobiops texanus Casey, 1898, N. Y. Ent. Soc. Jour. 6: 67 ;_ Lesne, 1901, Soc. 



Ent. de France Ann. (1900) 69 : 506-507, 511 ; 1938, in Junk (pub.) , Coleopt. Cat., 



pt. 161, p. 60: Anderson, 1939, Wash. Acad. Sci. Jour. 29 (9) : 391, figs. 39, 43 



(larvae) ; Belkin, 1940, Ent. News 51 : 192. 



Male. — Reddish brown, sometimes with the head, pronotum in part, 

 and apex of elytra darker ; antennae, palpi, anterior coxae, last visible 

 abdominal sternite, and legs (except anterior tibiae) brownish yellow. 



Head slightly convex, usually with two small, median tubercles on 

 front, densely, finely granulose, with a few larger granules inter- 

 mixed on front, with fine, longitudinal, parallel costae on occiput, 

 sparsely clothed with short, recumbent, inconspicuous hairs, with a few 

 longer, erect hairs intermixed; clypeus nearly flat, densely, shallowly 

 punctate, sparsely clothed with short, recumbent, inconspicuous hairs ; 

 clypeal suture deeply depressed at middle, obsolete at sides. 



Pronotum quadrate or slightly wider than long, widest along mid- 

 dle; sides vaguely rounded or parallel along middle, more strongly 

 converging anteriorly ; apical and posterior angles broadly rounded ; 

 surface sparsely clothed with short, recumbent, inconspicuous hairs, 

 with numerous long, erect hairs on apical half toward lateral margins, 

 sparsely, indistinctly punctate at sides, finely, densely granulose on 

 median part of basal half, densely, irregularly dentate on apical half, 

 the teeth broad, semierect, variable in size, and rasplike. 



Elytra at base subequal in width to pronotum along middle; sides 

 nearly parallel, conjointly broadly rounded at apices; surface densely 

 clothed with short, recumbent, whitish hairs, except sometimes at base, 

 rather densely, coarsely, irregularly, shallowly punctate on disk ; apical 



