LIFE HISTORY AND HABITS: THE EGG. 
4 
Taste VII.—L£gg-laying records from 4 
1905—Continued. 
43 
pairs of the plum curculio, Washington, D. C., 
EGG PUNCTURES MADE EACH WEEK BY EACH BEETLE. 
| 
“ June i . 
May | May | May | June|June | June|June} 29- |July | July, July 
No. of pair. i1-17.| 18-94,| 95-31.| 1-7. | 8-14. | 15-21. 22-28,] July | 6-12. | 13-19. 20-26,| Total. 
5. 
. 12! ss| 10] 4s| 51| 59| 67| 26] 19| 34] 2] 616 
24 eee eee 77 54 70 52 41 44 1PM re rep tal eee Ne ttt lene oe 350 
+ at 6084555 Ree eeaeeos 61 65 61 39 16 25 274 ee be S54 beeenea Peace 289 
|. -- Lot SaaS See 2 ol ll 13 28 Po | eee Jeceeec|ereeee|ereeee[eeeeeefeee ee: 131 
ARG URN US See eee eae 301 218 254 167 136 128 101 26 19 34 | 2 1, 386 
Average 
Nowof pair Date last | Date of death Days ander number of 
SONU egg laid. of beetles. Fiori eggs laid 
‘ per day. 
Ul. 22.083 SSeS ee eee July 21 | Aug. 282...... 2110 4.95 
f July 71 2 157 - 
oes ts ce nw eens s Smile wwielnwian se cle ashe ws June 26 eran a 257 \ 6.19 
ERTL ei Sas oe 154 
PR ee a alates aes 2 soe ne eins see eee see June 26 Apaty 625200 257 \ 4. 60 
June 181_..... 139 
ape ate Hee 8 a, a ea June 10 Ne dens ene 3 \ 3. 23 
1 Male. 2 Female. 
The beetles were captured at Arundel, Md., on the 9th of May by 
jarring plum trees. All caught were inclosed together under a bell 
jar until May 11, when the pairs were separated and placed in indi- 
vidual jars. From three to five fresh plums were added at intervals 
of one to four days, and those taken out were carefully examined. 
After about June 10 apples and plums were used as most convenient. 
The insects were kept under a temperature considerably higher 
than out of doors, namely, in the insectary building. The prolificacy 
of these individuals is not greater on the whole than in the case of 
those observed at College Park (Table III), but the death of pairs 
2, 3, and 4 was evidently hastened beyond what would occur under 
normal conditions. 
In every case more egg punctures were made than oviposited in, 
though the difference in the case of pairs 3 and 4 is less than with 
pairs 1 and 2. 
In the curculio egg record on peach, Myrtle, Ga., 1906 (Table VIII), 
the beetles were captured by jarring, April 5, and taken in copulation 
some hours later. Each pair was separately confined in a jar and 
supplied with peaches until July 25. As all peaches had been gath- 
ered from the trees by this date, foliage was supplied subsequently, 
which fact no doubt hastened their death, as most individuals died 
within a few days. 
