373 



DIPTERA. 



Curculionidce and minute Lepidoptera, together with 

 Aphides and species of Thrips, which last are thought by 



__^^ Mr. Walsh to prey 



upon the cecidomyious 

 larvte. 



The subdivisions of 

 the large genus Ceci- 

 doin3'ia are noticed by 

 Osten Sacken in Part 

 1 of the Smithsonian 

 Monographs of Dip- 



Fig. 283. 



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, 

 Z^'goneura ; 293, 

 Anarete ; 294, Ca- 

 tocha ; 295, Cam- 

 pylomyza ; 29G, 

 Lestremia) which 

 are also related to 

 the M^-cetophi- 

 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 

 284. young. We figiu'e 



(297) a species whose metamorphosis has been traced by 

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



