2. 



3- 



4- 

 5- 



6. 



7- 

 S. 



9- 



10. 



1 1. 

 3- 



C. solidaginis. ^ in. ; 



stem of goldenrod. 

 C. liirtipes. Bright red 

 C. serrulata. Brown. 

 C. chrysopsidis. V6 in. 

 C. 



CECIDOMYIA. Gall Gnat. 



reddish; body with black bands; wing blackish, hairy. On 



with black hair. 

 On alder, 

 red ; wing gray, hairy. 



On golden aster. 



destructor. The Hessian fly. yjj in. ; black; body tawny, with black rings; wings 



black. In the stems of wheat, which causes it to stunt in growth. 

 C. tritici. The wheat midge. T V in. ; like the last, but wings transparent. Attacks 



the ear of wheat. 



C. robinice. ^ in. ; forms swellings in the locust stems. 

 C. grossiihiritc. Causes the gooseberries to turn premature red and rot. 

 C. salicis-rigidcc. 1 in. On willows. 

 C. strobiloides. Causes the pine cone-like end-buts on willows. C. albovittata lives 



in them. 



C. pini-inopis. Attacks the needles of the pine trees. 

 C. ornata. T ^ in. ; body red ; wings with five brown spots. 

 C. trifolii and C. leguminicola. In clover-leaves. 



LASIOPTERA. Edged Midge. 



14. L. ventralis. T l g- in. ; blackish-brown, with yellow legs; front edge of wing black, 

 i^. /.. vitis. T *g in. ; red ; black head. On grape vines. 



(22) 



