326 



Vniversitij of California Publications [Entomology 



occurring in very dense colonies on the terminal shoots of wil- 

 lows. Taken on the campus, June 13, 1916, infesting the arroyo 

 willow, Salix lasiolepis Benth. 



Pterocomma flocculosa (Weed) (figs. 14 and 15). Taken at 



Fig. 15. rtrrocomma flocculosa (Weed). Eggs laid on arroyo willow, 

 Salix lasioJrpif^ Benth., Sacramento, Cal., Dec. M, 191 fi. (Original. Photo 

 by Div. Sci. Illust., Univ. Calif.) 



Berkeley on arroyo willow, Salix lasiolepis Benth., June 15, 1916, 

 at Rutherford, California, June 21, 1916, on the same willow, 

 and at Sacramento, California, December 14, 1916, on the same 

 plant. In the latter case the oviparous females were depositing 

 quantities of eggs which were partially concealed by white 



