1895. PROCEEDINGS OF THE NATIONAL MUSEUM. 97 



doubtless to assist id grasping the female; the same contrivance is 

 found among the smooth lulida?. 



Postgenital legs of males with coarse, rounded, chitinous tubercles on 

 the inner face of the apical joint; smaller tubercles also on the sub- 

 apical joint. 



Male genitalia simple, the basal joint very small, almost hidden under 

 the expanded reniform base of the apical, which is densely hirsute on 

 its median face, and has some especially long bristles at the base of 

 the ungual portion. This last is bifid nearly half its length, the divi- 

 sions subequal, one strongly falcate, the other oblique and less falcate. 



Color in alcohol a faded light brown, the carimiB and ends of the 

 anterior segments whitish. The posterior median part of each seg- 

 ment is lighter than the rest, except the carinte, and the anterior part 

 of the animal is lighter than the loosterior. Legs and antennae also 

 light brown. 



Length, 24 ram.; width, 6 mm. 



Locality. — Tana Eiver, East Africa. 



Type, — One mature male in the National Museum collection. 



SYNOPSIS OF AFRICAN GENERA OF STRONGYLOSOMATID^. 



Legs 4-6 of male with the third joint crassate and enlarged below into a distinct 

 tuberculoid process: Genus Cnemodesmiis, type C. thysanopus (Cook and Collins). 

 Third joint of male legs not specially modified 



Dorsum slightly convex, the suture crenulate, carin?e well developed, all sharply 

 produced at the posterior corners; legs and antennae short; sterna broad, all un- 

 armed: Genus Orthomorpha, type 0. coarctata (Saussure). 



Dorsum strongly convex, the suture not crenulate, carina^ inconspicuous, not pro- 

 duced excejit on a few subterminal segments; legs and anteunie long and slender; 

 sterna narrow, especially the posterior of each segment of males; anterior sternum 

 of fifth segment with one or two spinose processes 



Males slender and with long antenna? and legs; females robust, antennne and legs 

 much shorter; sterna unarmed or slightly prominent, sternum of the fourth pair of 

 legs witli two distinct conic spines ; coxa? of last pair of legs separated at base by at 

 least the thickness of a leg; carin:e of all the segments distinct, slightly produced 

 beyond the posterior margin on 'posterior segments: Genus Habrodcsmus, type H. 

 hi'tus. 



]\rales and females subequal, both with very long legs and antenna?; sterna, espe- 

 cially the posteiior of eacli segment, armed at the base of each leg with a distinct 

 conic spine; sternum of fourth legs with a stout process, bideutate at apex; coxae 

 of last pair of legs almost in contact at base; carin;e represented by rounded eleva- 

 tions, not produced ; those of segments 3, 4, 6, 8, 11, and 14 indicated only by the supe- 

 rior impressed line: Genus Scolodesmus, type S. grallator. 



Proc. N. M. 95 7 



