XORTH AMERICAN BOSTRICHIDAE 135 



the apical angles, the lateral process on the apical declivity short and 

 not extending to the tip of the elytron, the middle tubercle at anterior 

 margin of the apical declivity short and not acute at the apex, the 

 lateral margins of the elytra with a deep, oblong emargination in front 

 of the lateral process, and a deep emargination beneath the process, 

 shallowly emarginate near the apex, which is strongly elevated, and 

 the first visible abdominal sternite short at middle and the other 

 sternites very abnormal in shape. 



Length 3-4.5 mm., width 1-1.3 mm. 



Type locality. — Northern Guinea. Sierra Leone, and Kamerun: 

 location of types unknown to writer, but some are probably in the 

 Paris Museum. 



Distribution. — Specimens have been intercepted a number of times 

 at Xew York and Baltimore under the bark of mahogany logs from 

 the Gold Coast. Africa. Xothing has been recorded on the habits of 

 this species. So far as known, this species has not become established 

 in the United States. 



Lesne (1901) described securifer from five males and three females 

 collected along the Guinea coast from Sierra Leone to Kamerun, with- 

 out designating any of the places as the type locality. 



Genus XYLOTHRIPS Lesne 



Xylothrips Lesne. 1901. Soc. Ent. de France Ann. (1900) 69: 479, 620-626; 

 Jakobson, 1913, Kafer Russland, pt. 10, pp. 804, 806 ; Lesne, 1938, in Junk (pub.) , 

 Coleopt. Cat., pt. 161, p. 67. 



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

 strongly transverse, arcuately emarginate in front ; labrum transverse, 

 broadly rounded or subtruncate and densely ciliate with long, yellow 

 hairs in front ; mandibles attenuate toward apices ; eyes large, oblong, 

 strongly projecting. Antenna 10-segmented ; first and second seg- 

 ments robust, first slightly arcuate, elongate, second slightly shorter 

 than first ; third to seventh segments short, compact, transverse, united 

 shorter than first segment of club ; last three segments forming a large, 

 loose, compressed club, densely clothed with very short, yellow hairs, 

 each with indistinct, elongate sensory depressions on each surface, the 

 eighth and ninth segments oblong-rectangular, subequal in length to 

 each other, tenth elongate, longer and narrower than ninth. Pronotum 

 strongly convex, arcuately emarginate in front, truncate at base, den- 

 tate anteriorly, not transversely depressed behind anterior margin; 

 sides margined along basal half, the margin extending along base 

 for a short distance. Scutellum small, quadrate. Elytra strongly 

 convex, with costiform tubercles along anterior margins of apical de- 

 clivity. Legs short, subequal in length; tibiae slightly expanded to- 

 ward apices, slightly dentate on exterior margins, each with a large, 

 arcuate spine at apex, anterior pair longitudinally carinate on exterior 

 surface ; posterior tarsi as long as, or 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. — Apate flavipes llliger. (Present designation.) 

 Lesne erected Xylothrips for two species, Apate flavipes llliger and 

 Apate religiosus Boisduval. without designating a genotype. 



