6. Posterior scutal margin regularly 

 rovinded. Circvtmspiracular area 

 pilose. (Widely spread in small 

 popiilations throughout much of the 



Sudan) H. RUFIFES 



Figures l'S2 and IH'^ 



Scutum strongly narrowed postero- 

 laterally to form an almost recti- 

 linear posterior margin. Circum- 

 spiracular area not pilose. (Fair- 

 ly common in central areas of the 



Sudan) H . IMFRESSUM 



FigtJres~17A. and 175 



7. Lateral grooves deep and \d.de, ex- 

 tending to the eyes. Scutum smooth 

 and shiny except posteriorly where 

 it is densely pvtnctate; posterior 

 margin of scutum usually rectangu- 

 lar. (Common in central areas and 



dry parts of southern areas) H. TRUNCATUM 



Figures""l8b and 187 



Lateral grooves long but not well 

 marked. Scutal punctations ir- 

 regular, often more dense posterior- 

 ly, sometimes numerous anteriorly; 

 posterior area not markedly dif- 

 ferentiated from rest of scutum; 

 posterior margin bluntly rounded. 

 (Central areas of the Sudan, un- 

 common) H. MARGINATUM 



Figures 178 and 179 



- 399- 



