16 
of the entire cocoon stage, and he obtained the following results: The 
shortest time was 13 days, the longest time 25 days, and the average 
time 16.75 days. 
Observations made for me by Mr. Titus in 1900 for the purpose 
of determining the entire cocoon stage and also the duration of its 
two peri va and as pupa—gave results which I have tabu- 
lated below. His averages for the entire period are somewhat larger 
than those obtained by Mr. Taylor. It may be partially due to the 
fact that he was compelled to open the cocoons daily before pupation 
to determine their condition. This, however, should not affect the 
pupa stage. 
TaBLE VIII.—Time spent by codling moth from beginning of spinning stage to 
appearance of moth, Fort Collins, Colo, 1900. 
Larve |Moth ap-Num- Total E | Larvee ‘Moth ap- 'Num-) Total 
Larve taken. |pupated.| ee oe ber. | time. Larvee taken. ‘ pupated. nee ed. PEt, | time. 
| Days. | Days. 
July 2- 3 | July 16 ] 149 Peis Sees July 14} July 31 | iI 23 
Do - July 18 ] LG | nly: GesS.2 eee July 15 |.-..do-..} 1 22 
Do July 16 2 14 Does sy July 16 |....do 1 | 22 
Do ..-| July 22 1 20) Kely LOE aa  ae July 14 |....do---| iba 21 
Do. 9 | July 24 1 22) Ul yal SS. - July 18 | July 30 4) 19 
July 3 i | July 18 4 15 1D) eae eee Oar yaad | 20 
Do -| July 20 4 17 Does 2-02-25) Are 2 3 22 
Do July 21 1 | 18 DO seeeees “do... Auer al 4 21 
Do July 22 2 19 DO en te July 19 | Aug. 2 | x 22 
Do .---do-..| July & 1 2() Does a ' 00.24) AUerooy z 23 
Dot sal July 9 July 24 1 Pi Nel | aa Dey ee ee -.do.-SAup.. 4 4) 24 
Vitulyatt Se s=* S7|-8 doe sihauly.-20 2 16 || July 12..-.---= July 16) July 30 1 | 18 
Ones s2222 ..--do...| July 21 5) 7 Deeb. 79. 80)2 | lyase 1} 19 
Do ....--.-| July 8 | July 23 1 19 Doywas ees July lj Aug. 3 | 2 | 22 
SMU Die = us ees = )--G0)-2| suly 21 1 16 DOmee anaes 1 July 19; Aug. 4 | it 23 
Open dae | July 9| July 22 1 17 | Doses dose Aries) ete 25 
Do nee | July 10 | July 23 1 18 | Doe tea July 20 | Aug. 4 | 1 23 
DOR ee aly, Oe edO sesh ae 18 | Doras 3 do 2) Ane nior 1 | 29 
DOE oe sue 10 | July 22 1 17 | DOS aoe 2200-2 | eee 1 29 
Shah cj oe ee ee .-| July 24 5 18 || Aug. 11 --| Aug. 13 | Aug. 30 | 3 19 
DG wee “Tay: 12) | domes 3 18 || Aug. 13 ...| Aug. 18, Aug. 31 ] 18 
Do 2222.22.) July 13) July 25 6 19 Do ....| Aug. 17 | Sept. 5 2 23 
Doe S| does) sallye2on 2 20 Do... .2-22|4-2300\---- Sepi.. ou 1 | 24 
Dose ia -do...| July 27 4 21 || Aug. 18.------| Aug. pil eidoe as 1 19 
Wopetee a=. “July 14 | July 30 | 3 24 Do ....----| Sept. 6 | Sept. 16 | 1 29 
Do ......--| July 18 | July 3! 2 25 Sept: 4. S24 |. do set -sdores 1 12 
MULyIS soe Sale July 12) July 30 2 22 | 
The time required tor pupation, according to the above record, after 
the larva comes down from the tree, was, for 1 larva, 1 day; for 6 
larve, 2 days; for 10 larvee, 3 days; for 18 larvee, 4 days; for 15 larve, 
5 days; for 7 larve, 6 days; for 31 larvee, 7 days; for 14 larve, 8 days; 
for 1 larva, 12 days; for 1 larva, 19 days. The average time was 9.6 
days and the range in time from 1 to 19 days. Number of larvee in 
the reeord, 104. 
The time spent in the pupa state by the same larvee was as follows 
Four were pup 10 days; 2 were pupz 11 days; 25 were pup 12 days; 
13 were pup 13 days; 24 were pupz 14 days; 15 were pupe 15 days; 
10 were pupe 16 days; 7 were pupz 17 days; 3 were pupe 18 days; 2 
were pup 19 days; 1 was pupa 20 days, and 2 were pupae 21 days. 
‘The shortest time in the pupa state was 10 days and the longest time 
21 days. The average time was 14 days. 
