Plate IV. 

 Injury to plants by Diptera 



1. lUotch mines of the spinach leaf miner, Pegoiivjia 

 hi/oscyami Panz. (Muscidae). x 1 



ii. Serpentine mine of the columbine leaf miner, 



Phijiomyza aqviJeqiae Hardy (Au'rornvzidae). 



X i ■ ' 



8. Larvae of pear undue. (Jonfarrn'm pijnrora liiley 

 (Cecidomyidae), in youna- pears, x "2 



4. Larvae of the cabbage nuio:<j:ot, Ilr/hnm/ia hrassirae 

 Bouche (Muscidae), injurinir cal)bai:;e plant, 

 X 1 



