33 



Fig-. 30. Diptera. Yellow fever mos quite. 

 Enlarged. (From U.S. Dept. Agric ) 



Fig. 31. Diptera. House flea. 

 pupct; (c) aluH 

 rom U.S Dtpt 



. . . 



(a) larva; (b)pupct; (c) aluHflea. All enlarged. 

 (Fr 



