A. persicus 



15 



Nymphs resemble ,/s, but have no sexual orifice. There are two 

 nymphal stages (a and b) separated by a moulting. Nymphs (a, Figs. 

 21, 22) measure when full-fed, 4 to 45 mm. In second-stage nymphs 

 (b, Fig. 23) the discs are more marked, though not as distinct as in 

 adults ; when full-fed they measure 55 to 6'7 mm. 



Fig. 11. 



Fig. 12. 



Fig. 10. 



Fig. 10. A. persicus (Indian). Left spiracle of last stage nymph, oriented to the long 

 axis of the tick's body (compare with Fig. 4 of ? ). The orescentic cribriform plate 

 170 n long. Drawn from balsam specimen and opaque object with camera lucida. 

 Original N. 



Figs. 11, 12. A. persicus l and ? genital orifices and coxae, etc. Specimens from 

 India. Original N. and W. 



Fig. 13. 



Fig. 13. A. persicus i capitulum, ventral aspect, 

 Fig. ' 



. 13. A. persicus i capitulum, ventral aspect, x71. Indian specimen. C 

 . 14. A. persicus ? right palp in profile, external aspect, x 75. American 

 Original N. 



Fig. 14. 



Indian specimen. Original N. 

 specimen. 



