DISEASE-BEARING AMERICAN MOSQUITOES 



31 



Fig. 31. — Larva of Anopheles crucians. {After John H. Smith, New Jersey 



Agricultural Experiment Stations.) 

 1, larva; 2 head from above; 3, antenna; 4, palpus; 5, mandible; (>, mentum; 

 7, anal segments from side; 8, anal segments from above, showing spiracles; 

 9, one of the scales. All are greatly enlarged. 



