373 



DIPTERA. 



283. 



Curculionidce and minute Lepidoptera, together with 

 Aphides and species of Thiips, which last are tliought by 



Mr. Walsh to prey 

 upon the cecidoniyious 

 larvoe. 



The subdivisions of 

 the large genus Ceci- 

 doniyia 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, 

 witliout 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, C'ani- 

 P3'lomyza ; 29 G, 

 Lestremia) which 

 are also related to 

 the M3'cetoi)hi- 

 lids. 



AVe have al- 

 ready referred, on 

 page 51, to cer- 

 tain c e c i d o « 

 myians, whicli in 

 the larval condi- 

 tion p r o d u c e 

 Fig. 284. young. We figure 



(297) a species whose metamorphosis has been traced by 

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



