STRUCTURE, CLASSIFICATION, AND KEYS 



11 



"■■+*^ tarscil joint: 



.~,t«rs«| claw 3- 



en 5* taridl ^emt. 



Fig. I. Adult of A'edes sollicitans with parts named. (After John B. Smith.) 



species is submitted in which the change from the old to the less familiar 

 new name is specified. Some sort of artificial key is necessary for the 

 determination of species of mosquitoes. Practical work has shown the 

 need of the two types of keys. 



The first will involve the use of microscopic characters and is in- 



