44 



Genus Ornithodoros 



crescentic. Capitulum stout, free; palps (Fig. 61) tapering, articles 

 1 and 2 equal in length ; article 3 the shortest ; hypostome (Fig. 62) 

 short with dentition 3 1 3 as regards the principal teeth, the external 

 teeth the stoutest; more numerous smaller teeth posteriorly; Chelicerae: 

 see digit (Fig. 63). Legs (Figs. 58, 64, 70 and 71) stout, the last 

 pair one and a half times the length of the first ; coxae contiguous 

 and diminishing from I to IV ; the protarsus (article 5) of leg I has 

 three large dorsal humps, the middle the largest, and the tarsus three 

 sub-equal humps equidistant ; the tarsus of leg IV has three humps, 



Fig. 61. 



Fig. 62. 



Fig. 63. 



Fig. 61. 0. savignyi. Palp, the articles measuring from base to tip 400 — 400 — 250 — 



310 p (Nn. 1896, fig. 31). 

 Fig. 62. 0. savignyi. Hypostome, x 65 (Nn. 1896, fig. 30). 

 Fig. 63. O. savignyi. Digit, 200 ju I. (Nn. 1896, fig. 29). 



the two proximal near together, an interval three times as great 

 separating the second and third. The </ and ? resemble each other 

 except in the generally smaller size of the £ and of the </ genital 

 orifice 1 . Many long blunt hairs thickly beset the anterior margin 

 of the body giving it a downy appearance. 



1 See Figs. 66, 67 of O. moubata. 



