134 MISC. PUBLICATION 6 9 8, U. S. DEPT. OF AGRICULTURE 



terior margin ; sides with a more or less distinct margin near posterior 

 angles. Scutellum small, quadrate or slightly elongate. Elytra 

 strongly convex, with distinct, irregular tubercles or processes at 

 apical declivity, and lateral margins deeply, irregularly emarginate 

 near apices in both sexes. Legs rather long, subequal in length ; tibiae 

 slightly expanded toward apices, each with a moderately long, arcuate 

 spine at apex, anterior pair finely dentate on exterior margins ; pos- 

 terior tarsi much longer than tibiae, apical segment of each shorter 

 than preceding four segments united. Anterior coxae contiguous. 

 Middle coxae narrowly separated. Intercoxal process of abdomen 

 lamellate. Body elongate, cylindrical. 



Genotype. — Xylion securifer Lesne. (Present designation.) 

 Lesne (1901) erected Xylion for nine species from Africa and 

 Australia, without designating a genotype. 



Xylion securifer Lesne 



Xylion securifer Lesne, 1901, Soc. Ent. de France Ann. (1900) 69: 546, 554-555, 

 figs. 365, 366 ; 1924, Bostrychides de l'Afrique Tropicale Francaise, pp. 231, 232, 

 237, figs. 165-167; 1938, in Junk (pub.), Coleopt. Cat., pt. 161, p. 64. 



Male. — Strongly shining, brownish yellow, with apical declivity of 

 elytra reddish brown. 



Head slightly, transversely flattened between eyes; front deflexed 

 along anterior margin, glabrous, coarsely, sparsely punctate ; occiput 

 finely, irregularly rugose; clypeus flat, coarsely, shallowly punctate, 

 the anterior margin with a short median lobe, which is feebly, arcu- 

 ately emarginate ; clypeal suture biarcuate, not very distinct. 



Pronotum quadrate, widest along middle, slightly triangularly de- 

 pressed at middle behind anterior margin; sides parallel or vaguely 

 rounded at middle, broadly rounded anteriorly and posteriorly, with 

 a broad, slightly arcuate tooth at apical angles, slightly margined near 

 posterior angles but not along base ; posterior angles broadly rounded ; 

 surface glabrous, sparsely, very finely, indistinctly punctate at sides 

 on basal half, indistinctly imbricate-punctate on median part of basal 

 half, densely, irregularly dentate on apical half, the teeth broad, semi- 

 erect, variable in size, and rasplike. 



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

 slightly expanded posteriorly; surface glabrous, very finely, rather 

 densely punctate on basal two-thirds, coarsely, irregularly pjunctate on 

 apical declivity ; sutural margins distinctly elevated on apical decliv- 

 ity, the margins expanded toward apical angles where they are con- 

 jointly narrowly emarginate; lateral margins deeply, narrowly, 

 emarginate on each side below exterior process on apical declivity, 

 then broadly subtruncate near apices; apical declivity obliquely de- 

 flexed, each elytron with a large, broad, arcuate, lateral process, which 

 extends beyond tip of elytron, subtruncate at apex, nearly touching 

 process of opposite elytron, and with three costiform tubercles along 

 anterior margin of declivity, the middle tubercle arcuate, much longer 

 than other tubercles, and acute at apex. 



Abdomen beneath indistinctly punctate, sparsely clothed with a few 

 short, recumbent, white hairs ; last visible sternite normal, short, sub- 

 truncate at apex. 



Female. — Differs from the male in having the sutural margins on 

 apical declivity of the elytra more conjointly broadly emarginate at 



