/. rasus 



220 



Female (Figs. 225-226) : Body rather short-oval, broadest at the 

 posterior third. Scutum (1*9 x 1*5 mm., Nn.), reddish brown, oval, 

 glossy, dark brown, with very numerous fine, equal punctatious ; cervical 

 grooves superficial but nearly attaining the posterior border; lateral 

 ' grooves barely indicated by a slightly prominent margin. Dorsum with 

 three posterior longitudinal grooves, and with numerous punctations 

 studded with short hairs. Venter with similar punctations and hairs. 

 Vulva between coxae IV ; anal groove circular, with anus eccentric, as 

 in {/". Capitulum long (l - 3 mm., Nn.), base an equilateral triangle, with 

 slight cornua. Porose areas oval, size variable, converging in front, 

 the interval about equal to their breadth ; auricula forming a stout 

 retrograde process (variable in size, see Fig. 225). Hypostome lanceolate ; 

 teeth 4 1 4, then 3 | 3, finally 2 j 2, the externals stout and pointed, 

 the internals blunt; the inner files far apart. Palps flat, cultriform, 

 the outer border nearly straight, the inner convex ; article 2 twice 

 as long as 3. (Chelicera, see Fig. 226 A.) Legs of medium length ; 

 coxae I and II near together, the coxae somewhat separated. The coxae 

 resemble those of f, but the spurs tend to become obsolete in large ?s. 



Fig. 225. /. ratus ? unfed : dorsum, part of venter, tarsus 4, spiracle. Details (to 

 right) showing variation {p.a.) in size of porose areas ; a in size and form of auricula; 

 in coxa I (note spur) and vulval flap or apron, as observed in another specimen out 

 of .the same lot. Collected from man and dog, Kumasi, Ashanti, by W. Oraham, 

 x. 1907. (N. 928. Original, G. H.F.N, del.) 



