378 



DIPTKUA. 



CurculionidoB and minute Lepidoptera, together with 

 Aphides and species of Thrips, which last are thought by 



Mr. Walsh to prey 



i <*, //J^S^W^v upon the cecidomyioiis 



larvae. 



The subdivisions of 

 the large genus C'eei- 

 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 are 



'l ~f'L j Anarete and its 



allies (Fig. 292, 

 Zygoneura ; 29:5, 

 Anarete; 294, Ca- 

 tocha ; 295, Cain- 

 pylomyza : 296, 

 Lestremia) which 

 are also related to 

 the Mycetophi- 

 lids. 



We have al- 

 ready referred, <>n 

 page 51, to cer- 

 tain c e c i d o > 

 myians, which in 

 the larval condi- 

 tion prod n c e 



Ki^r. -jst. young. We figure 



(297) a species whose metamorphosis has been traced by 

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



