THE DOBSON BECOMES A HELLGRAMITE. 



45 



they may be seen in the evening flying about electric street 

 lamps. 



The female hellgramites 

 deposit their eggs in the cir- 

 cular masses upon the sides 

 of rocks in running streams. 

 They seleGt such situations 

 that the little dobsons when 

 hatching can drop directly 

 into the water. Some such 

 egg masses deposited on a 

 rock in the middle of a New 

 England river are shown in 

 the photograph reproduced 

 in Fig. 40. 



In regions like the Mis- 

 sissippi Valhy where rocks 

 are less abundant than in 

 the eastern states these egg 

 masses are deposited upon 

 the large leaves of sycamore 

 and other trees overhanging 



the W'ltei"* Fig. 44. — nuUgramitc. Male, natural size. 



