87 
find traces of Pelecinus parasitism when the contents of the cage were 
examined the following spring. 
Tue Tawny Bes-rty (Sparnopouius rutvus Wied.) 
The larva of this bee-fly was first reported as an enemy of white- 
grubs in 1907 by Dr. Forbes (26), his assistant, Mr. E. P. Taylor, having 
found it attached to the back of a Phyllophaga grub at Elliott, UL, 
August 25, 1904. Whether it is ectoparasitic as are the Tiphias or pre- 
daceous as are the Asilidae seems not to have been positively determined. 
Probably it is in a sense parasitic for, owing to its small size, it caw 
and probably does obtain all the necessary food from a single grub; but 
since the fly can not enter the soil to lay its eggs directly on the grub, 
Fic. 19. Sparnopolius fulvus Wied., female. 
and probably, therefore, oviposits in a crack of the ground, the larva 
upon hatching from the egg must search through the earth for its host, 
the grub, and is to this extent predaceous. 
This species has been reported from such widely separated localities 
as New Jersey, New Mexico, and Illinois, and although a common insect 
it is probably not of prime importance as an enemy of the white-grubs. 
