Vol. XI] COLE AND LOfETT—LIST OF OREGON DIPTERA 295 



598. Physocephala marginata (Say) 

 Albany, VII-10; Corvallis, VI-5. 



599. Zodion fulvifrons Say 

 Hood River, VI-16 (Cole) ; Mackenzie Ridge, alt. 6,000 

 ft., VIII-1. This species has been bred from the common 

 honey bee. 



600. Zodion pygmaeum Will. 

 Hood River, VI- 19 (Cole). 



601. Zodion occidentale Banks 

 Hood River, VI-3 (Cole) ; Mary's River, V-2; Corvallis, 

 V-13. 1916, Ann. Ent. Soc. Amer., IX, p. 194. 



602. Zodion triste Bigot 

 Corvallis, V-13 (Lovett). 



603. Dalmannia pacifica Banks 

 Mosier, VI-14 (Cole and Childs) ; Corvallis, VI-6, 1899, 

 the type specimen. 1916, Ann. Ent. Soc. Amer., IX, p. 199. 

 A number of freshly emerged specimens were taken at 

 Mosier feeding at a yellow flower of the aster family. The 

 females were observed striking a species of Halictus, as these 

 bees passed by the flowers on the way to their nests 

 in the ground. The two would often go to the ground 

 together, rolling over and over in the dust. The flies prob- 

 ably succeed in some cases in depositing an egg on the body 

 of the bee. 



604. Dalmannia vitiosa Coq. 

 Forest Grove, IV-30 (L. P. Rockwood). One specimen. 



605. Oncomyia abbreviata Loew 

 Corvallis, V-2 (Lovett). 



606. Oncomyia baroni Will. 

 Corvallis, VI-2 (Lovett) ; Horse Lake, VII-25. 



607. Oncomyia loraria Loew 

 Corvallis, V-2 and VI-5 (Lovett). 



