PLATE LXXIV 



Figure 1. Dorsal view of Argas persicus, ? . ds., discs, mp., 

 marginal pits, x 8. 



Figure 2. Ventral view of same, an., anus, cx.f., coxal fold, 

 ga., genital aperture, mp., marginal pits, scx.f., supra- 

 coxal fold. X 8. 



Figure 3. Ventral view of Argas reflexus, 2 . Note the con- 

 tiguous coxae and compare with figure 2. X 12. 



Figure 4. Ventral view of Ornithodorus turicata, $ . X 12. 



Figure 5. Ventral view of Argas vespertilionis, $ . cx.f., 

 coxal fold, ds., discs, ga., genital aperture. Ha., 

 Haller]s organ, id., intestinal diverticula. scx.f., 

 supracoxal fold, sp., spiracle, x 14. 



Figure 6. Ventral view of Ornithodorus moubata, ? . ga., 

 genital aperture, m., mammillae. X 6. 



