13 



hood 



[Lateral \ 



margir 

 \up turned I 



lateral 



suture 

 ■peripheral 



flange 



discs 



differentiated 



periphery 



(stnoted) 



subapicol dorsal 

 protuberonce 



hood 

 copitulum 



genital aperture 

 suprocoxol fold 



spiracle 

 coxal fold 

 onus 



ventral paired 

 organ 



14 



Figures 13 and 1/., 5, Pfypothetical Argas species 

 KEY MCEPHOLOGICAL CHARACTHIS, GENUS ARGAS 



PLATE XII 



- 5^ - 



