Dorsal and ventral periphery of distinct * 



quadrangular "cells". Postpalpal hairs 

 present. (Chicken parasite, common in 



Sudan) A. PEF.SICUS 



Figures T5,l&>27,28 



Dorsal and ventral periphery finely 

 wrinkled. Postpalpal hairs absent. 



(Pigeon parasite, very rare in Sudan) A. REFLEKUS 



Figures 17,13,29,30 



Figures 15 and 16, Argas persicus Figures 21 and 22, Argas vespertilionis 

 Figures 17 and 13, Argas reflexus Figures 23 and 21,, Argas boueti 

 Figures 19 and 20, Argas brumpti Figures 25 and 26, Argas confusus 



DORSAL PHIIPHHIAL DIFFEaMTIATION (odd numbered figures) AND LATERAL 

 INTEGU>1©JT (even numbered figures) OF ARGAS SPECIES. 



Note especially the presence of a lateral suture in Figures 16,18,20 and 22 

 * and its absence in Figures 2^. and 26. 



-56- 



