70 



PARASITOLOGY. 



spatula-shaped hypostotne divided into two symmet- 

 rical halves, and on each half there are arranged three 







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t« a a 



O O 'rt 



H < C S 



^:f 



S ^ W 



W O 



g| . 



H O to 



rt IX, f 



w ^ M :e 



Q ; X "2 tn >^ "5. 



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rows of irregular shaped denticles, 

 are surrounded by palpi. 



&4 



The mandibles 



