Vol. XI] COLE AND LOVETT—LIST OF OREGON DlficRA 335 



The larvae live in plant tissue, leaves, stems and fruits. 

 Some of the species are gall-makers and the group contains 

 many of our worst pests of fruit, both citrus and deciduous. 

 They are especially injurious in tropical countries, in some 

 places ruining nearly the whole fruit crop. Aldrich lists 

 over 200 species from North America. 



823. Epochra canadensis Loew 



Common in western Oregon. The flies appear in May 

 and June. The larvae live in currants and gooseberries and 

 are a serious pest. 



824. CEdaspis atra Loew 

 Hood River, IX-8 (Cole). 



825. Rhagoletis caurina Doane 

 Described from Oregon. 



826. Rhagoletis cingulata (Loew) 



Corvallis, Salem, Cove, Sheridan and vicinity of Port- 

 land. The larvae are cherry-maggots. 



827. Rhagoletis pomonella (Walsh) 



Colestin VII-31 (E. P. Van Duzee). One specimen. 

 This is the form bred from snowberry at Vernon, B. C, and 

 recently published on by Mr. Downes. It cannot be dis- 

 tinguished from the eastern apple maggot but does not 

 attack the apple here, confining itself to the snowberry, Sym- 

 phoricarpus racemosus. 



828. Aciura maculata Cole 



Medford, V-28 (Noren) ; one specimen at Burns, V 

 (Thompson). 1919, Proc. Cal. Acad. Sci., Ser. 4, IX, 

 p. 252. 



829. Eutreta diana O. S. 



Corvallis, VI-21, with a label "sage brush"; Grant Co.; 

 Narrows, VII-1. The type was bred from galls on wild 

 sage, Artemisia tridentata, in Missouri by C. V. Riley. 



December 14, 1921 



