24 



MOSQUITO ERADICATION 



and a five-jointed foot or tarsus. The last tarsal joint is tipped with 

 claws. 



"The wings have scales, generally collected along the veins. The 

 color and arrangement of the scales determine the uniformity or spotted 

 appearance of the wings." 



ANATOMY OF THE LARVAE 



Headlee 1 describes the larva as follows: 



"Like the adult, the wriggler exhibits the three divisions of the body 

 — head, thorax and abdomen. The head bears a pair of eyes, a pair of 



antennal case 

 head 



—-trumjoets or 

 breatnino lutes 



Inorax 



e~ue 



T 



mnnc case 

 ec cases 



SUJimming 

 baddies 



Fig. 17. — Mosquito pupa with parts named. (After John B. Smith, New 

 Jersey Agricultural Experiment Stations.) 



antennae and rotary mouth brushes. Each antenna exhibits a small 

 bunch of hairs, which has been designated as the antennal tuft. The 

 thorax has various tufts of bristles scattered over it, known as the 

 thoracic tufts. The abdomen consists of eight well-developed segments, 

 each of which bears some tufts of bristles, known as the abdominal hair 

 tufts. The eighth segment has grown a process known as the anal tube 

 or siphon, which bears a double row of spines on its posterior surface 

 and has the opening of the breathing system at its tip. In nearly all 

 species, this tube is used to penetrate the water surface film and to reach 

 the atmospheric air. The ninth segment is small, bears a large group 



1 "The Mosquitoes of New Jersey and Their Control," New Jersey Agri- 

 cultural Experiment Stations, Bull. 276, 1915. 



