Vol. XI] COLE AND LOVETT—LIST OF OREGON DIPTERA 337 



903. Chlorops sahlbergi Loew 



Forest Grove, V-2 (Cole). Cole det. Compared with a 

 specimen determined by Becker. 



904. Chloropisca glabra (Meig.) 



Forest Grove, IV-22 to V-17 and Hood River, VI-3 to 

 X-26 (Cole) ; Narrows, VII- 1. Our commonest species. 



905. Chloropisca variceps Loew 



Corvallis, IV-9 and V-12; Hood River and Forest Grove, 

 VI (Cole). 



906. Elachiptera decipiens (Loew) 

 Forest Grove, I V-2 (Cole). 



907. Elachiptera nigriceps (Loew) 

 Corvallis, V-2 (Lovett). 



908. Oscinis coxendix Fitch 

 Corvallis, V-2 (Lovett). 



909. Oscinis frit Linn. 



Narrows, VII- 1. A species of economic importance in 

 Europe. 



910. Oscinis sulphurihalterata Endl. 



Corvallis, IV-2 (Chamberlin). Bred from cones of Abies 

 grandis. 1911, Sitz. Ber. Ges. Natf. Freunde, Berlin, p. 

 222. 



911. Dicraeus ruficeps Meig. 

 Hood River, VI-3 (Cole). Cole det. 



912. Madiza conicola Greene 



Long's Ranch and Ashland, IX-2. Reared from cones of 

 Abies concolor. 1919, Proc. Ent. Soc. Wash., XXX, p. 69. 



