373 



DIPTERA. 



Fig. 283. 



Curculionidce and minute Lepidoptera, together with 

 Aphides and species of Thrips, which last are thought by 



Mr. Walsh to prey 

 upon the cecidomyious 

 larvae. 



The subdivisions of 

 the large genus Ceci- 

 domyia are noticed by 

 Osten Sacken in Part 

 1 of the Smithsonian 

 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 arc 

 Anarete and its- 

 allies (Fig. 292, 

 Zygoneura ; 293, 

 Anarete ; 294, Ca- 

 tocha ; 295, Carn- 

 pylomyza ; 296. 

 Lestremia) which 

 are also related to 

 the Mycetophi- 

 lids. 



We have al- 

 ready referred, on 

 paiiv 51, to cer- 

 tain c e c i d o - 

 myiaiis, which in 

 the larval condi- 

 tion produce 

 Fig. 284. young. We figure 



(297) a species whose metamorphosis has been traced by 

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



