I X 



LIST OF ILLUSTRATIONS 



Plato I. Fig. 1. Argas refleanis (J, dorsum. 

 Fig. 2. „ reflexus § , venter. 



Fig. 3. „ persicus £ , dorsum. 



Fig. 4-5. „ vespertilionis, last stage nymph, dorsum and 



venter to face p. 4 



Plate II. Fig. 1-2. Ornithodoros savignyi $ , dorsum and venter . 



42 



Plate III. Fig. 1-2. 



talaje var. capensis, dorsum and venter 



to face p. 60 



IN THE TEXT 



FIGURE PAGE 



A and B. Schematic, to show differences between Argasidae and Ixodidae 1 



1. Ornithodoros coriaceus ^ with names of parts referred to in the 



descriptions of Argasidae 7 



2. Argas persicus <J, the capitulum with names of parts referred 



to in the descriptions of Argasidae ..... 7 



3-4. A. persicus $? , dorsum and venter ...... 13 



5-8. A. persicus, details of integumental structure .... 14 



9. A. persicus, the anus ......... 14 



10. A. persicus, the spiracle IS 



11-12. A. persicus, the male and female genital orifices, etc. ... 15 



13-14. A. persicus, the capitulum and lateral view of the palp . . 15 

 15-18. A. persicus, the digits of the chelicerae, the hypostome, and 



tarsus I seen in profile ....... 16 



19-23. A. persicus, representing stages of development from unfed larva 



to second stage nymph 16-17 



24-25. A. persicus, the larva, dorsum and venter 17-18 



26. A. persicus, tarsus and foot, and hypostome of larva ... 19 



27-28. A. reflexus (J, dorsum and venter 24 



29-32. A. reflexus, a palpal hair, digits and hypostome .... 24 



33. A. reflexus, tarsi I and IV 25 



34-35. A. hermanni, digit and hypostome 28 



36-37. A. transgariepinus 9 , dorsum and venter 29 



38-41. A.brumpti $? , dorsum and venter 30-31 



