es (Game 
"They did not oviposit on the following types: 
bn 
Red, rine, sclid, no skin broken. 
Red, ripe, bruised sputs but aot unbroken. 
Partly ripe, bruised spots but skin entire. 
Overrive, somewhat softened, with bruised spots but skin un- 
broken. . 
Fo a aa 
H> OY 70 
—— ~—— wee” Seat 
"In short, it appcars that the presence of tomato juice or pulp 
on the outside of the fruit is necessary before oviposition will take 
place; and if this is present the Pic a will -oviposit, regardless of 
the condition of the erg ‘Drosophila replete Woll., however, has 
been reared only from badly decayed fruit and the adults in cages 
have refused to oviposit on fresh tomato pulp. This species seems 
to be a scavenger." 
ene 

FOREST INSECTS 
The gipsy and srown-tail moths and cold weather.--C. W. Collins, 
of the Melrose Saeed Mass., field laboratory, reports that the 
unusually cold weather that prevailed in New England from December 
28 to December 30, inclusive, was undoubtedly fatal to eggs of the 
gipsy moth (Porthetria dispar L.) in sections of the infested terri- 
tory where they were,in exposed situations, unprotected by snow, ice, 
or other material. There eae also some mortality in the 
case of the small browm-tail moth ‘pmia pnaeorrhoea Don.) ‘cater- 
pillars in their winter webs. J. 3 Summers, Greenfield, Mass., has 
stated (in U. S. Dent. agr. Bull. 1080)- that an exposure of between 
-209 and -25° F. is necessary to kill entire egg clusters of the 
gipsy moth, although sume egzs in each cluster may be killed by an 
exposure to ~159. Other records of exneriments and observations on 
file at the Melrose Highlands, Mass., field laboratory indicate that 
the caterpillars of the brown-tail noth in.their winter nests can 
withstand slightly lower temperatures than can gipsy moth eggs. Rec- 
ords furnished by. the Boston office of the Weather Bureau snow that 
temperatures of ~20° F. and below occurred. in December at certain 
points throughout the territory generally infested by the two in- 
sects and the station: has made collections from which it will later 
be possible to determine to what extent they were killed by the cold 
spell . 
Increased efficienc 

parasitic fly.--The Melrose Highlands, 
Mass., field laboratory has collectsd cocoons of, the oriental moth 
(Cnidocampa. flavescens Walk.) at points in Boston and vicinity where 
the tachinid fly Cheetexorista javaria B. & B., imported from Japan, 
was liberated in 1929 and 1930. The overwintering larvae contained 
in the cocoons have been examined by R. T. Webber to ascertain what 
