pheles crucians (shown in fig, 3). The former two are found 

 nearly all over the country, but the last is a more Southern species, 

 although it has been found as far north as the south shore of Long 

 Island. 



As to the early stages, the eggs of Anopheles may be at once dis- 

 tinguished from the eggs of Culex by figs. 4 and 5, those of Culex 

 being laid in the raft-shaped mass on end and those of Anopheles 

 being laid singly upon the surface of the water, always lying upon 

 their sides. The larvae of Culex, commonly known as wigglers, are 



\\\ 



Fig. 2. — Anopheles maculipennis : 



Male at left; female at right, 

 illustration). 



Enlarged (author's 



familiar to almost everyone, and are the common wigglers found in 

 horse troughs and rain-water barrels, which wriggle around in the 

 water, returning at frequent intervals to the surface to breathe, and 

 when at the surface hanging with simply the tip of the tail extruding, 

 the rest of the body being held below the surface at a great angle. 

 What we have called the " tail " is simply the breathing tube, which, 

 with the common Culex wigglers, is long and more or less pointed. 

 With the malarial mosquitoes, however, the wiggler, or larva, is of 

 somewhat different shape, as shown in figs. 6 and 7, and when resting 

 39022— Bull. 155—08 2 



