208 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Se*. 



46. Bittacomorpha occidentalis Aldr. 

 Hood River, VI-3 (Cole). This is undoubtedly the 

 species recorded from Oregon by Osten Sacken in "Western 

 Diptera" at clavipes. 



47. Bittacomorphella 1 sackenii (Roder) 

 Hood River, VI-5 (Cole). C. P. A. det. 



Family RHYPHID^ 



Fig. 2. Rhyphus alternatus Say. Wing, and head from above. 



This small family should be changed from the old position 

 as it is now connected with the Tipulidae through the 

 Trichocerinas. The flies of the genus Trichocera are quite 

 different from the others of the family in general appearance 

 and wing venation, but the early stages are so near the 

 Rhyphina? that they have recently been placed in their present 

 position by Dr. Alexander. 



48. Rhyphus alternatus Say. 



Corvallis, V-25 ; Albany, V-2 and Forest Grove, IV-20 

 (Cole). 



49. Trichocera 2 colei Alex. 



Forest Grove, XI-11, 111-20, 26, and Hillsboro, IV-1 

 (Cole). C. P. A. det. 1919, Can. Ent., LI, p. 162. Para- 

 types of this species were reared from turnips at Vancouver, 

 Wash., Dec. 12, 1918 (Wm. Giles). 



iGenus Bittacomorphella Alexander 1916, Proc. Acad. Nat Sci. Phila., 

 LXVIII, p. 545. 



2 The species of this genus in North America will have to be compared with 

 the European forms before they can be made out with any certainty. Many 

 of the species seem to be hoi arctic and it is probable that some of our names 

 are synonyms. Some of the species collected in Oregon could not be deter- 

 mined owing to this condition in the taxonomy of the group. 



