NORTH AMERICAN BOSTRICHIDAE 117 



Head slightly convex; front slightly deflexed along anterior mar- 

 gin, densely, finely granulose, sparsely clothed with short, recumbent, 

 whitish hairs; occiput with fine, longitudinal, parallel costae; clypeus 

 flat, coarsely, sparsely punctate, sparsely clothed with short, semi- 

 erect, inconspicuous hairs; clypeal suture deeply depressed at middle, 

 indistinct toward sides. 



Pronotum distinctly wider than long, widest at basal third: sides 

 broadly rounded posteriorly, more obliquely coverging anteriorly, 

 with a large, broad, unciform tooth at apical angles; posterior angles 

 broadly rounded: surface sparsely clothed with short, recumbent and 

 semierect. inconspicuous hairs, sparsely, rather finely granulose on 

 basal half, densely, irregularly dentate on apical half, the teeth broad, 

 semierect. variable in size, and rasplike, with a few larger teeth on each 

 side near lateral margins. 



Elytra at base subequal in width to pronotum at basal third ; sides 

 slightly expanded posteriorly, conjointly triangularly emarginate at 

 apices (obtusely angulate when viewed from above) : surface rather 

 densely clothed with very short, recumbent, yellowish hairs, which are 

 more semierect on apical declivity, finely, densely punctate on basal 

 two-thirds, the punctures denser and coarser posteriorly, coarsely, 

 deeply, continently punctate on apical declivity; sutural margins 

 broadly expanded and moderately elevated on apical declivity, 

 strongly, abruptly elevated at apices; lateral submargin extending 

 inward to near lateral tubercle on anterior margin of apical declivity : 

 each elytron with three distinct, costiform tubercles along anterior 

 margin of apical declivity, the two sutural tubercles spinose at apices, 

 the lateral one obtusely rounded at apex. 



Abdomen beneath finely, densely punctate, densely clothed with 

 short, recumbent, yellowish hairs ; last visible sternite broadly rounded 

 at apex. 



Female.— Differs from the male in having the underside of the lat- 

 eral margins of the elytra armed with a large, broad tubercle near 

 the sutural angles, and the last visible abdominal sternite with a large, 

 round emargination at the apex, the emargination nearly closed pos- 

 teriorly by two converging spiniform teeth. 



Length"5.5-9 mm., width 2.75-3.4 mm. 



Type locality. — Of crinitarsis, Africa (?); location of type un- 

 known to writer but probably in the Museum at Basel, Switzerland. 

 Of puoescens. Old Calabar. Africa; type in the British Museum. 



Distribution. — The distribution of this species is restricted to the 

 central-western part of Africa, from Portuguese Guinea to Loanda. 

 and includes French Guinea. Sierra Leone, Liberia. Ivory Coast. Gold 

 Coast, Nigeria, Kamerun. Togoland, Portuguese Guinea, and Belgian 

 Congo. This species has been intercepted at New York and Balti- 

 more in mahogany logs from the Gold Coast. Africa. So far as 

 known, it has not become established in the United States. 



Hosts. — Lesne (1924) records this species as living in the dead wood 

 of Cacaoyer (cacao tree). 



Genus XYLOPRISTA Lesne 



Xyloprista Lesne, 1901. Soc. Ent. de France Ann. (1900) 69: 47.",. 497-502; 1938, 

 in Junk (pub.), Coleopt. Cat., pt. 161, p. 55. 



Head deeply inserted in prothorax, not visible from above : clypeus 

 strongly transverse, subtruncate in front, with a small tooth on each 



