54 THE PLUM CURCULIO. 
TasLe XVIII.—Length of egg stage of the plum curculio, various localities. 
[From preceding tables. ] 
Eggs ob- | Minimum | Maximum | Average 
Localities and years. Sail. period. period. period. Remarks. 
Days. Days Days. 
Washington, D. C., 1905..... 247 2.50 ‘ 3.77 | Eggs kept in insectary. 
Myrtle, Gas, 19065. 2-2. one 140 2.75 6.75 4.44 | Eggs kept indoors. 
New Richmond, Ohio, 1907.. 113 3.25 6.25 4.92 Do. 
Washington, D. C., 1908. ...-. 45 7.75 11.00 9.23 | Eggs kept out of doors. 
Siloam Springs, Ark., 1908... 18 3.50 6. 00 4.66 | Eggs kept indoors. 
Douglas, Mich., 1910.......-.- 944 3.00 12.00 6.02 | Eggs kept out of doors. 
Barnesville, Ga., 1910.......-. 445 3.00 13. 50 6. 62 Do. 
THE LARVA. 
HABITS OF LARVZ 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 11 a.m. A larva hatching at 
10.46 a. m. was found partly entered at 11.07 a. m. Three larvee 
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 hatching it at once began to burrow. Frequent 
dissections from fruit of larve of known age indicate that within 2 or 
3 hours after hatching the fruit has been penetrated. 
The course which the larve 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 
Rosenfeld (Table XIX). 
TaBLE XIX.—Course in fruit taken by newly-hatched plum-curculio larve. 
Dates of x Nes Fruits 
observa- Kind of fruit. oa exam- Course taken by larvee in fruit. 
tion. PE arg ined. 
Apres) 20 ee Reaches... ees Base. qsenseece 1 | Straight into pit. 
May; ese: Red June plum...---- APO ecec scene 5 | In almost to kernel, then around to basal 
end of pit. 
aw ie Oeste ones cee Das alebee ence 2 | Into side of pit, then around to apical end. 
Pas 3 dos. 258 Se cee ses] BaSO sees ee alee Do. 
Se CO Ko eee ee ere Se No) oyre eG ee 1 | Straight into pit. 
fee Coz. - 24. ee) Basalt ees. 2 | Straight in about 7; inch, then around to 
apical 4 of pit. 
Dee ss Se Gos essere eee Apex 1 | Straight into pit. 
ae § 0520.4 S25 os | HB asa soos - 1 Do. 
Elberta peach.......-- Center side... - 1 Do. 
aoe (6 (eee eee maa] ae) sos a0 (iss 1 Dos « 
3 13 ft eae dovs225. 3232 ieee doz 1 Do. 
Rear (6 Co ey een! (ial bys \cfaja Se 1 Do. 
eae Witldiplumie.snce ae en Apex.... 1} Around under skin for a short distance, 
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; 
