123 THE WATER CABINET, 
THE GNAT—Culex pipiens (LINNZUS) 
In the operation of dragging, many curious larva are 
brought out, and the mud should be searched carefully for 
them before washing the net for another cast. The larva 
DRAGON FLIES. 
a. Virgin Dragon Fly—Calepteryx Virgo. 
6. Green Dragon Fly—Zshna varia. 
of the gnat is one of the most interesting of these, and 
during summer may be obtained in hundreds if a little of 
