G. H. F. Nutt all 
299 
Ixodes nairobiensis n. sp. 
Fig. 4. 
Male: Unknown. 
Female (Fig. 4): Hard parts chestnut brown. (Dorsal aspect) 
Scutum long oval, much longer than broad (1-26 x 0-8 mm.), with 
emargination normal, scapular angles pointed, lateral ridges distinct; 
cervical grooves defined by a depressed area external to them and two 
oblong depressions posteriorly along their course, not attaining the 
posterior borders; punctations few, fine. Capitulum (mutilated in the 
type) with base roughly equilateral-triangular, dorsal ridge slightly con¬ 
cave; cornua but slightly protruding, arising from lateral ridges; porose 
areas large, near posterior border, of irregular shape, depressed, bounded 
Fig. 4. Ixodes nairobiensis n. sp. $. Scutum, capitulum in dorsal and ventral aspects, 
coxae with trochanters, anus with anal grooves, spiracle and tarsus 4 (G.H.F.N. del.). 
laterally by ridges, the interval less than their width with central 
depression flanked by ridges; (Ventral aspect) auriculae long, recurved, 
protruding outwardly, posterior portion of base quadrangular; hypo- 
stome? Venter: vulva facing third intercoxal space; anal grooves 
horse-shoe shaped, nearly joining behind; anus near posterior border; 
spiracle a short flattened oval, transverse, macula nearly central. 
Legs : coxa I with internal spur and postero-external protrusion, 
posterior margin trenchant; coxae II—III trenchant, unarmed; coxa IV 
slightly trenchant, with short postero-external spur; tarsi tapering 
