373 



DIPTEEA. 



Curciilionidce and minute Lepidoptera, together with 

 Aphides and species of Thrips, which last are thought by 



Mr. Walsh to prey 

 upon the cecidomyious 

 larvre. 



The subdivisions of 

 the large genus Ceci- 

 domyia are noticed by 

 Osten Sacken in Part 

 1 of the Smithsonian 

 F[ s- 283 - Monographs of Dip- 



tera. As the student can refer to that work, we simply intro- 

 duce the cuts showing the venation of the wing of each genus, 

 without farther characterizing them. (Fig. 285, Cecidomyia ; 

 286, Diplosis ; 287, Colpodia ; 288, Epidosis ; 289, Asynapta; 



290, Spaniocera ; 



291, Lasioptera). 

 Another group of 

 this family are 

 Anarete and its 

 allies (Fig. 292, 

 Zygoneura ; 290, 

 Anarete ; 294, Ca- 

 tocha ; 295, Cam- 

 pyloniyza ; 296, 

 Lestremia) which 

 are also related to 

 the Mycctophi- 

 lids. 



We have al- 

 ready referred, on 

 page 51, to cer- 

 tain c e c i d o - 

 myians, which in 

 the larval condi- 

 tion p r o d u c e 

 Fig. 284. young. AVe figure 



(297) a species whose metamorphosis has been traced by 

 Nicholas AVagner. The larva is cylindrical in form, like most 



