Vol. XI] COLE AND LOVETT— LIST OF OREGON DIPTERA 259 



Lake; Mary's Peak; Mt. Jefferson; Santiam Nat. Forest. 

 These big flies are usually found on old pine logs in the sun- 

 light and are very wary; they usually return to the same 

 place however, after a rather abrupt and rapid flight. In 

 some specimens the wings are much paler than in others. 



345. Laphria Xanthippe Will. 

 Horse Lake, VII-25 and Mt. Jefferson; Pamelia Lake, 

 alt. 3,000 feet, VII-30 (Bridwell). McAtee has recently 

 made this a variety of fells O. S. 



346. Dasyllis astur Loew 

 Reported from Oregon by Williston. 



347. Dasyllis californica Banks 

 Parkdale, VII- 12 and Hood River, VI-6 (Cole) ; Pamelia 

 Lake, Mt. Jefferson, VII-25 (Bridwell); Corvallis, V-29; 

 Elk Beds, Mt. Hood, VIII-10 (Bridwell). 1917, Bull. 

 Brookl. Ent. Soc, XII, p. 54. 



348. Dasyllis columbica Walk. 

 Corvallis, V-ll; Mt. Jefferson, VII-20 (Bridwell); 

 Mary's Peak, VII-14 (Lovett). 



349. Dasyllis fernaldi Back 



Pamelia Lake, Mt. Jefferson, 3,000 feet, VIII-6 (Brid- 

 well). 1904, Can. Ent., XXXVI, p. 290. 



350. Dasyllis sackeni Banks 



Corvallis, V-14 (Lovett) ; Colestin, VII-30 (E. P. Van 

 Duzee). 1917, Bull. Brookl. Ent. Soc, XII, p. 54. 



351. Proctacanthus occidentalis Hine 



Corvallis, VII and VIII; Roseburg, VIII-19 (Black); 

 Medford, VIII-25; Bend, V-19; Hood River, VII-25 

 (Cole). This species was predatory on grasshoppers at 

 Hood River. 1911, Ann. Ent. Soc. Amer., IV, p. 159. 



352. Promachus princeps Will. 

 Hood River, VII-2 (Cole). 



