70 THE PLUM CURCULIO. 
A total of 411 larvae: was under observation, the time spent in the 
fruit varying from 15 to 30 days. The average of all individuals 
was 21.43 days. 
Observations were also made at Douglas, Mich., during 1910 by 
Mr. Hammar, on the complete life-cycle period of 121 individuals. 
For purposes of comparison the egg and larval stages combined are 
shown in Table XXX. The fruit used was peach. The average 
time for all individuals for June and July was 20.8 days. 
TaBLE XXX.—Length of time spent in fruit by the plum curculio (egg and larval stages 
combined), Douglas, Mich., 1910. 
| Larve leaving fruit in specified days from deposi- | Total 
Fggs | Date of tion of eggs. eg and 
depos- | egg deposi- © larval 
ited. tion. | 3 | | days in 
16) 17 | VS | V9) |.20) | 21) 22°) 23) 24°)525>) 265) 270) fraik. 
a (ESET (ES eS EY or ae | ete : 
| | | 
CO feet oe 2 ene Bertclesea|| dll) ay ale sosl) 1) esac) eeaclesoo|lsene =e 
10}; Fane: 299) sSelessal Qo SB GAM A ese a sla = ol ee ee 
A Waume: sO se Seis] Meee ie aa Se ee | eres egy | epee Petal Bos) aaseoece 
Mobaleocs- 3 |. cate: vee Lee eee 392 
38 | July rit eee Te iteo) eae ce Ble 2 AS eS a S| Ae 
20 | July OR ah Seca! Ole Wal Bohesse| weer soe See eeeeeee 
19 | July ale LS ACA SS ial ed | eee Pcs. 5 | eons 
16 | July 4]. LS2Al Ge NSO Aiea = al eal ee ee Oe ee to 
6 | July 6 |. Ga eee ee aes | ahs [Cee Tete Be ee ee oe 
Hi) alye 20)" S| 5, A es er a es a ere) We eS ee 8 
Calya S215\e Sod im ee ee lk ee TA ee rene 
Motaless. = 1 | MOM ai | Gi les Se ees) il Ly [22) 122 
| = 2 
Total for | | 
June and | 
Tolygeee- AO es22) 1) Sl Taal sS6N Zoe 20s lel eo ateeell 1 | 2,514 
- | 
Average time in fruit for June........-.-......-.-- (Leen LS nd cee a Rie ee a days.. 19.6 
‘Average time sm iniititor UUlyees, ae oe eee nee ee ce ne eee Oe ie ae ee ee dot-ca al 
Average time iniruit for June and Jilly. aces cee <i cee eae eee ee eee ee do20'8 
In Table XX XT are shown the results of observations on the length 
of time spent in the fruit by the curculio at Barnesville, Ga., during 
1910. The fruit used was peach. 
