Vol. XI] COLE AND LOVETT—L1ST OF OREGON DIPT ERA 287 



539. Brachyopa media Will. 



Hood River, V-17 (Cole) ; Corvallis, V-15 (Lovett). 



540. Brachyopa notata O. S. 

 Corvallis (Preston); Hood River, VI-6 (Cole). 



541. Volucella evecta Walk. 



Corvallis, V and VI (Lovett and Black) ; Forest Grove, 

 1V-31 (Rockwood). Fairly common. 



542. Volucella tau Bigot 

 Corvallis, V-10 (Lovett). 



543. Sericomyia chalcopyga Loew 

 One of the commonest of midsummer forms in higher 

 altitudes, 2,500 to 6,000 feet. 



544. Arctophila f la grans O. S. 

 Wallowa Co., VI (Ault). 



545. Arctophila harveyii Osburn 

 Nine specimens, Mt. Jefferson, 5,800 ft., VIII (Lovett). 

 Would make the following additions to description to fit our 

 specimens : Margin of fourth segment of abdomen of female 

 not reddish, scutellum of male below translucent reddish, 

 disc of abdomen sometimes with distinct, dull reddish tinge. 

 1906, Can. Ent. XXXVIII, p. 1. 



546. Pyritis kincaidii (Coq.) 

 Corvallis, V (Lovett) ; Forest Grove, V-3 (Cole). 



547. Pyritis montigena Hunter 

 Baker, IV (Entermille). 



548. Eristalis flavipes Walk. 

 Moderately common, a very diversified species. 



549. Eristalis latifrons Loew 

 Corvallis, V-27 (Lovett). 



