24 



Genus Argas 



(marginatus); discs arranged much as in A. persicus but the integument 

 much more finely wrinkled. Ventral surface : anus nearly central, with 

 smooth anal ring. Spiracles crescentic, elongated transversely, equal in 

 length to the width of the anal ring ; genital opening as in A. persicus. 

 Capitulum: base with two long post-hypostomal hairs ventrally, directed 

 forwards. Palps with articles sub-equal, the third the shortest, denticu- 

 lated hairs (Fig. 29) dorsally. Chelicerae: digit, see Figs. 30, 31. 

 Hypostome (Fig. 32) rounded terminally, some small denticles at the 

 tip, followed by 2 1 2 stout teeth merging into 3 1 3 to 6 1 6 progressively 



Fig. 27. Fig. 28. 



Figs. 27, 28. Argas reflexus, j x 10 dorsum (with detail of margin) and venter. 

 From specimen lent by Prof. Neumann. Original, N. and \V. 



Fig. 29. 



/ 



Fig. 30. 



Fig. 31. 



Fig. 32. 



Fig. 29. A. reflexm. Palpal hair, x 250 (Nn. 1896, fig. 2). 



Fig. 30. A. reflexws Tar. magma. Left digit, x 225 (Nn. 1896, fig. 14, modified). 



Fig. 31. A. reflexus. Left digit, dorsal aspect, x 220 (Nn. 1896, fig. 1, modified). 



Fig. 32. A. reflexus var. magnus. Hypostome, x 100 (Nn. 1896, fig. 15). 



