PLATE 28 



A. — Eggs of Pegomyia affinis. 



B. — Parasitized eggs of Pegomyia calypirata. 



C. — Eggs of Pegomyia calyptrata. 



D. — A small mine on Rumex leaf, showing the original linear mine and the begin- 

 ning of the blotch mine. 



E. — A typical mine on Rumex obtusifolius produced bj' the larva of Pegomyia 

 calyptrata. 



F. — A monstrosity, an adult P. calyptrata issuing feet first from its puparium. 



G. — A typical mine on Rumex crispus produced by the larva of Pegomyia calyptrata. 



H. — A mine on Rumex obtJisif alius, produced by a nearly mature larva entering a 

 new leaf to complete its development. 



(244) 



