126 MISC. PUBLICATION 698, U. S. DEPT. OF AGRICULTURE 



declivity sparsely, deeply, coarsely, irregularly punctate, the sutural 

 margins slightly, broadly elevated, and lateral margins strongly ele- 

 vated; each elytron with vaguely indicated costae at base, and with 

 three costiform tubercles along anterior margin of apical declivity, 

 the tubercles (except sometimes the sutural one) spinose at apices. 



Abdomen beneath finely, densely, indistinctly granulose or punctate, 

 sparsely clothed with rather long, recumbent, whitish hairs; last visible 

 sternite slightly longer than preceding sternite, and broadly rounded 

 at apex. 



Female. — Differs from the male in having the last visible abdominal 

 sternite twice as long as the preceding sternite, and the apical declivity 

 of the elytra not so deeply depressed. 



Length 3-5 mm., width 1-1.9 mm. 



Type locality. — Southwestern Texas ; type in the Horn Collection in 

 the Academy of Natural Sciences of Philadelphia. 



Distribution. — From material examined : 



Texas : Specimens of this species have been collected at many localities in the 



State by various collectors. 

 Mexico : Victoria, collected on dead fig twig by E. A. Schwarz. 



This species has been intercepted at Nogales, Ariz., in mesquite from 

 Santa Ana, Sonora, Mexico. Schwarz (1888) reported finding adults 

 near Washington, D. C. 



Hosts. — This species has been reared from mesquite (Prosopis juli- 

 flora (Swartz) deCondolle),huisache {Acacia farnesiana (L.) Willde- 

 now), huajillo {Pithecolobiumi brevifolium Bentham), and horsebean 

 (Parkinsonia aculeata L.). H. J. Reinhard reported it infesting 

 nursery stock at College Station, Tex., during May 1939. 



Xylobiops sextuberculatus (LeConte) 



Sino.rijlon sextubereulatum LeConte, 1858, Acad. Nat. Sci. Phila. Proc. 10: 73-74; 



Horn, 1878, Amer. Phil. Soc. Proc. 17 : 542, 543. 

 Xylopertha sextubereulatum Gorham, 1883, Biol. Centr.-Amer., Coleopt, v. 3, pt. 



2, p. 216 ; 1886, sup. p. 353. 

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



Soc. Ent. de France Ann. (1900) 69 : 507, 512-513, figs. 299, 300; 1938, in Junk 



(pub.), Coleopt. Cat, pt. 161, p. 60; Belkin, 1940, Ent. News 51 : 192. 



Male. — Brownish or reddish black ; elytra reddish brown, sometimes 

 paler at base; antennae, palpi, and legs (except anterior tibiae) brown- 

 ish yellow. 



Head slightly convex, unarmed and densely, finely granulose on 

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

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

 erect hairs intermixed; clypeus vaguely convex, densely, shallowly 

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

 clypeal suture deeply depressed at middle, obsolete at sides. 



Pronotum slightly wider than long, widest along middle; sides 

 nearly parallel or vaguely rounded along middle, more strongly con- 

 verging anteriorly ; apical and posterior angles broadly rounded ; sur- 

 face sparsely clothed with short, recumbent, inconspicuous hairs, with 

 a few long, erect hairs on apical half toward lateral margins, finely, 

 sparsely, indistinctly punctate at sides, densely, finely scabrous at 

 middle on basal half, densely, irregularly dentate on apical half, the 

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



