318 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Holotype (No. 382), macropterous male in collection of 

 the California Academy of Sciences. 



Allotype, brachypteroLis female, in collection of Mr. Gif- 

 fard. 



Paratypes in both collections and in that of the author. 



355. Liburnia occlnsa Van D. Mr. Giffard took a long- 

 series of this species on Jnncus Icsurii at the following- local- 

 ities : San Francisco, July 13, 1917; Santa Cruz Co., June 

 9, 1917; Monterey Co., June 11, 1917; near Stckton. May 

 30, 1917. Macropterous examples were taken only in the 

 San Joaquin Valley, but both there and in Santa Cruz Co. 

 two forms of brachypterous females were found. The dark 

 form described by me in 1897 and a pale form of an almost 

 uniform testaceous-yellow color. In a long series an almost 

 complete gradation is found connecting these two forms and 

 this will possibly be found to be the case in the eastern liiiea- 

 tipcs as well. 



