273 
Ants swarmed over the surface of the manure and burrowed 
in where they found the mass dry enough, seeking both the 
eggs and the larvae of the flies. Pheidole megacephala Fabr. 
proved most useful in this work, attacking even the full grown 
maggots; Ponera perkinsi Forel was also in evidence. 
Mites gave considerable distress to the flies when they began 
to emerge, their bodies being frequently so covered with these 
predators that they could scarcely move about. 
At least seven species of hymenopterous parasites were 
secured, as they emerged from the various dipterous pupae. 
The large Cynipid, Eucoila impatiens Say, apparently came only 
from the puparia of the Sarcophagid; Spalangiids were very 
abundant, at least four species being present; Spalangia cam- 
eront Perk., S. philippinensis Full., S. simplex Perk., and one 
that is apparently new. Of the remaining, there were two spe- 
cies of Diapria and a few Pachycrepoideus dubius Ashm. The 
determinations of these Hymenoptera were kindly supplied by 
Mr. Fullaway and Mr. Timberlake; they are all fairly recent 
introductions. 
