Figures 178 and 179, <^y dorsal and ventral views 

 Figiires 180 and 181, 5, dorsal and ventral views 



A, $ genital area. B to D, 5 genital area outline and profile. 

 B, unengorged. C, partly engorged. D, fully engorged. 



HYALCMMA MARGINATUM 

 Sudan Specimens 



PLATE LII 



- ^65 - 



