16 BULLETIX 1066, II. S. DEPARTMENT OF AGRICULTURE. 
flies, determined by Dr. J. M. Aldrich as Myiophasia globosa Towns., 
Cholomyw longipes Fab., and Chaetochlorops inquiJhia Coq. (PL 
VIII. D and E) , were reared from the larva?. Two larvae in rearing 
cages died when full-grown and from each of their bodies there issued 
a hairworm several inches long, the species of which was not deter- 
mined (PI. VIII, C). 
METHODS OF CONTROLLING NUT-INFESTING CURCULIOS. 
The dropping of curculio-infested walnuts and hickory nuts before 
the larvae within them mature affords an opportunity for destroying 
the young insects by collecting and burning, or otherwise disposing 
of the fallen nuts. This method can be resorted to with success, how- 
ever, only in cases of isolated trees or plantations. In localities 
where the nut trees abound in woods a sufficient number of the cur- 
culio beetles will develop on them to visit and injure any near-by 
plantations of the same kind. Where this means of reducing the in- 
sects is practiced collections should be made as often as once a week in 
order to secure the nuts before the larva? leave them to enter the 
ground for the completion of their development. 
All the curculios discussed herein do more or less feeding in the 
beetle stage before oviposition begins in the spring. A considerable 
part of this food- consists of the surface tissues of stems, leaves, and 
fruit. This makes it possible theoretically to destroy the beetles be- 
fore their eggs are laid by spraying with arsenical poisons. Limited 
experiments by the writer indicate that lead arsenate applications 
soon after growth starts in the spring can be counted on to give good 
results in reducing injury, at least from the butternut and black wal- 
nut curculios. 
Britton and Kirk 13 have found that spraying walnut trees with 
lead arsenate at a strength of 6 pounds to 50 gallons of water is an 
effective method of controlling the butternut curculio. Morris, 14 in 
writing of attacks of the butternut curculio which were so extensive 
as to kill nearly 300 young English walnuts and several hundred 
young Japanese walnuts, states that subsequent spraying with 1 
pound of lead arsenate to 10 gallons of water killed the beetles and 
prevented further injury. 
13 Brittox, W. E., and Kirk, H. B. Op cit. 
:4 Morris, Robert T. Method for combating the "svalxct weevil. In Amor. Nut 
Jouvn., v. 10, no. 3, p. 71. 1919. 
O 
