IOO 



NORTH AMERICAN DIPTERA. 



Not all mosquitoes are criminals in this respect. Only 

 certain forms of Anopheles (in its wide sense) are known 

 to carry the germs of malaria ; while but a single species, 



I 



Fig. 31. Anopheles punctipennis, i, female adult; 2, female pal- 

 pus; 3, genitalia; 4, part of wing vein showing scales; 5, front, 6, 

 middle claws of male; all much enlarged. After J. B. Smith. 



