A KEPORT ON A COLLECTION OF HYIMENOPTERA 

 (MOSTLY FROM CALIFORNIA) MADE BY W. M. 

 GIFFARD. 



By S. A. RoiiwER, 

 Of the. Bxiimv 0/ Entomology, United States Department 0/ Agriculture. 



The following paper, which is a contribution from the Branch of 

 Forest Insects, is a report on a collection of Hymenoptera (mostly 

 from California) which had been assembled by W. M. Giffard and 

 received for determination through Dr. L. O. Howard. The types 

 of all of the new species and specimens of most of the species re- 

 corded have been presented to the United States National Museum. 



Considering the careful Avay in which Mr. Giffard has collected, it 

 is not surprising that a number of the species proved to be new. In 

 some of the groups the collection offered some especially interesting 

 species which although distinct from any described species are closely 

 allied and serve to indicate progressive modification of specific char- 

 acters. Especially is this true in Crabro s. 1. 



Unless otherwise specified, all the specimens were collected by 

 W. M. Giffard. 



Suborder CHALASTOGASTRA. 



Family ARGIDAE. 



ARGE, species. 



A species allied to clavicomis (Fabricius) from Eldorado County, 

 California, 8,400 feet, June, 1909, is represented by a single female. 



Family TENTHREDINIDAE. 



TENTHREDELLA VARIATA (Norton). 



A single male from Eldorado County, California, 8,400 feet, col- 

 lected June, 1909. 



STRONGYLOGASTER PACIFICA MacGilliTray. 



This species is represented by one female and seven males col- 

 lected in Eldorado County, California, June, 1909, at an altitude of 

 8,400 feet. 



Proceedings U. S. National Museum, Vol. 53— 2202. 



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