PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. VII, No. 11, pp. 249-318. December 31, 1917 



XI 



REPORT UPON A COLLECTION OF HEMIPTERA 



MADE BY WALTER M. GIFFARD IN 1916 



AND 1917, CHIEFLY IN CALIFORNIA 



BY 

 EDWARD P. VAN DUZEE 



Curator, Department of Entomology 



Mr. Walter M. Giffard of Honolulu has very kindly turned 

 over to me for study all the Hemiptera taken by him in Cali- 

 fornia and adjacent states during the summers of 1916 and 

 1917. Most of his collecting was done in central California, 

 largely about San Francisco Bay region, a district in which 

 little systematic collecting of the Hemiptera has heretofore 

 been attempted. Many general collectors have worked about 

 this portion of the state and a considerable number of the 

 Hemiptera taken have been described by the entomologists of 

 Europe and the eastern United States. Among the principal 

 papers including such material may be mentioned Stal's Re- 

 port on the Hemiptera of the Fregatten Eugenics expedition, 

 Uhler's Report on the Hemiptera from west of the Mississippi 

 River and his Report on the Hemiptera of Lower California, 

 Ball's various papers on western Jassids and one by the writer 

 on a few Hemiptera collected by Mr. D. W. Coquillette in Cali- 

 fornia. But two general faunal papers on our California He- 

 miptera have yet been published, both by the present writer, 

 one in 1914 covering his work in San Diego Co. and includ- 



December31. 1917 



