122 MISC. PUBLICATION 6 98, U. S. DEPT. OF AGRICULTURE 



ately emarginate or subtruncate in front, shallowly, arcuately emar- 

 ginate at base, dentate anteriorly, not transversely depressed behind 

 anterior margin; sides not margined. Scutellum small, quadrate. 

 Elytra strongly convex, each elytron with three tubercles on anterior 

 margin of apical declivity, the tubercles subtriangular, and at least 

 one spinose at apex. Legs short, subequal in length; tibiae slightly 

 expanded toward apices, each with a large, arcuate spine at apex, 

 anterior pair distinctly dentate on exterior margins ; posterior tarsi as 

 long as, or longer than tibiae, apical segment of each shorter than 

 preceding four segments united. Anterior coxae contiguous. Mid- 

 dle coxae narrowly separated. Intercoxal process of abdomen lamel- 

 late. Body, elongate, cylindrical. 



Genotype. — \Apate basil oris Say. (Present designation.) 

 Casey (1898) proposed Xylobiops for Apate basilaris (Say), 

 Sinoxylon texanum Horn, S. sex tuberculatum LeConte, and S. flori- 

 danimrh Horn, without selecting a genotype. Belkin 10 transferred 

 Sinoxylon floridanum to the genus Xylomeira as a synonym of torquata 

 Fabricius. This species was unknown to Lesne ( 1901 ) , but he retained 

 it under Xylobiops without separating it from the other species in his 

 table. 



KEY TO THE SPECIES OF XYLOBIOPS 



1. Dorsal surface of elytra (except apical declivity) without distinct pubes- 



cence, the yellow and black or brown areas conspicuously separated 2 



Dorsal surface of elytra (except along base) with distinct pubescence, the 

 light and dark-brown areas not conspicuously separated 3 



2. Inner two pairs of tubercles along anterior margins of apical declivity of 



elytra acute or spinose at apices and coarsely punctured between tuber- 

 cles, the surface of declivity coarsely, evenly punctured in female, with a 

 few very coarse, deep punctures |in male ;** front of head unarmed 



basilaris (Say), p. 122. 

 Inner two pairs of tubercles along anterior margins of apical declivity of 

 elytra not spinose at apices, and not coarsely punctured between tuber- 

 cles, the surface of declivity sparsely, finely, irregularly punctate in 

 female, nearly impunctate in male; front of head with two median 

 tubercles in both sexes parilis Lesne, p. 124. 



3. Apical declivity of elytra sparsely, coarsely punctured; front of head usu- 



ally with two median tubercles in both sexes texanus (Horn), p. 125. 



Apical declivity of elytra not, or very finely, punctured; front of head with 

 four to six small tubercles in female, unarmed in the male__ 



sextuberculatus (LeConte), p. 126. 



Xylobiops basilaris (Say) 



Apate basilaris Say, 1824, Acad. Nat. Sci. Phila. Jour. 3: 321-322; 1859, Com- 

 plete Writings (LeConte ed.), v. 2, p. 181. 

 Apate basillaris Harris, 1841, Insects Injurious to Vegetation, p. 76 ; 1852, ed. 2, 



p. 8 ; 1863, new ed., p. 92 ; 1890, Flint ed., p. 92 ; Packard, 1890, U. S. Ent. Commr. 



Rpt. 5 : 296, fig. 119. 

 Sinoxylon basilare Horn, 1861, Ent. Soc. Phila. Proc. 1 : 29 ; Riley, 1872, Noxious, 



Beneficial, and Other Insects of Missouri, 4th Ann. Rpt., pp. 53-54, figs. 26-27 ; 



Horn, 1878, Amer. Phil. Soc. Proc. 17 : 542 ; Schwarz, 1888, Insect Life 1 : 162 ; 



1890, Ent. Soc. Wash. Proc. 1 : 177 ; Hopkins, 1893, W. Va. Agr. Expt. Sta. Bui. 



32: 189; Lintner, 1896, N. Y. State Mus. Rpt. 49 (1895), p. 268; Blatchley, 



1910, Coleoptera of Indiana, p. 888, fig. 349; Robinson, 1912, N. Y. Ent. Soc. 



Jour. 20 : 292. 

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



Ent. de France Ann. (1900) 69: 506, 507-509, figs. 296, 297; Leonard, 1928, 





10 Belkin, J. N. notes on noeth American bostrichidae ( coleoptera). Ent. 

 News 51 : 192, 1940. 



