54 THE PLUM CURCULIO. 
Table XVIII. — Length of egg stage of the plum curculio, various localities. 
[From preceding tables.] 
Localities and years. 
Eggs ob- 
served. 
Minimum 
period. 
Maximum 
period. 
Average 
period. 
Remarks. 
Washington, D. C, 1905 
Myrtle, Ga., 1906 
247 
140 
113 
45 
18 
944 
445 
Days. 
2.50 
2.75 
3.25 
7.75 
3.50 
3.00 
3.00 
Days. 
5.00 
6.75 
6.25 
11.00 
6.00 
12.00 
13.50 
Days. 
3.77 
4.44 
4.92 
9.23 
4.66 
6.02 
6.62 
Eggs kept in insectary. 
New Richmond, Ohio, 1907.. 
Washington, D. C, 1908 
Siloam Springs, Ark,, 1908. . . 
Douglas, Mich., 1910 
Do. 
Eggs kept out of doors. 
Eggs kept indoors. 
Barnesville, Ga., 1910 
Do. 
THE LARVA. 
HABITS OF LARVAE JUST HATCHED AND COURSE TAKEN IN FRUIT. 
After making its escape from the egg, the little curculio larva 
usually remains for a short period in the egg cavity before boring 
into the fruit. In a comparatively short time after hatching, how- 
ever, it has usually buried itself out of sight. Thus a larva hatching 
at 9.50 a. m. on wild plum remained in the egg cavity until 10.45 a. m., 
but had disappeared in the flesh by 11a. m. A larva hatching at 
10.46 a. m. was found partly entered at 11.07 a. m. Three larvae 
found in their egg cavities at 9.40 a. m. entered the tissues at 10.20, 
10.26, and 10.40 a. m., respectively. A larva hatching on apple at 
9.30 a. m. did not succeed in getting out of sight in the flesh until 
1 p. m., though upon hatcliing it at once began to burrow. Frequent 
dissections from fruit of larvae of known age indicate that within 2 or 
3 hours after hat clung the fruit has been penetrated. 
The course which the larvae may take in the fruit is somewhat 
variable, though in general the pit or core is soon reached. Some 
detailed observations were made on this point by Messrs. Girault and 
Rosenfekl (Table XIX). 
Table XIX.— Course in fruit taken by newly -hatched plum-cur culio larvse. 
Dates of 
observa- 
tion. 
Kind of fruit. 
Location of 
puncture. 
Fruits 
exam- 
ined. 
Course taken by larvse in fruit. 
Apr. 20 
May 1 
1 
5 
o 
Straight into pit. 
Red June plum 
do 
Apex 
Basal £ 
Base 
end of pit. 
Into side of pit. then around to apical end. 
Do. 
do 
do 
1 
2 
Straight into pit. 
do 
Basal § 
Apex 
Straight in about ■£% inch, then around to 
2 
do 
apical i of pit. 
Straight into pit. 
do 
Basal § 
Center side 
do 
Do. 
Do. 
do 
do 
do 
Do. 
3 
do 
Do. 
Do. 
5 
then in toward pit; then out toward side 
of fruit, and in an irregular manner down 
to about center of side and finally to pit,' 
