THE LESSER APPLE WORM. 49 
hatched between one hundred and six and one hundred and twenty- 
four hours after deposition, the average being slightly more than five 
days. 
The following table of group records taken from batches of eggs 
deposited on sides of breeding cages and on apple foliage kept inside 
of cages shows the approximate time of incubation: 
TaBLeE III.—Period of incubation of eggs of Enarmonia prunivora under normal out- 
of-door conditions, Siloam Springs, Ark., 1908. 
Num- | Date de- 
ber of | posited, Black spot appeared. Egg hatched. Time. 
eggs. | night of— | 
Days. 
7 | Aug. 28 | September 2,m........ Sea Hese ee ace || Seplemiberys,) dele reer etal oe see 5t 
321) NSS 2D) NIST youG onl owe Clyde poe eaeeoeeocoe Sep bem Den-45 deiieet er eens eee | 5 
Hi Sepua On| SepLeMmber wha. Mle. 3255) see ose SEpLemMlbe rel 2 say Ul rree eee ree 54 
Sa Pe Diver wd SePLeMDera2 wml. ee eas. se eee ae HEPLE MIDS ea let eee 5% 
iis Sept. {9} |\septemberls jp ame. 2o2 sso eee SEDLCIA Der Gants eee eae ee 54 
MiTSeptol September 1G. ame sea s-eeaes eee MEP LEM O CRO citer et eee me ae 54 
SDE Sep lseLa || S6Psem Der li avers oe =a eae SKE OINeTOL IE Os ee pee eee Saeco e 44-51 
HepLentbeL LO} asimeon sn eee eee 43-51 
4 Sepbt: Lan] Septemberds, pa me... 2-25-52 SEpLemlper uO) aM yaya e eee eee 5} 
Gi Sepit.. 145 |(Septemberd9) ps me 2-53-22 25-2-- 5. september 20ha. Mle 2 2-2-2 eee eee 5} 
THE LARVA. 
The length of the larval period from, time of hatching to leaving 
fruit varied from thirteen to fifteen days during July, from twenty 
to twenty-seven days in August and the first half of September, 
and increased to from thirty to fifty days after the middle of Sep- 
tember to early November. 
Individual records for over 100 larvee show a minimum of thirteen 
days and a maximum of fifty days for actual time in fruit of normal 
healthy larve which left fruit prior to November 6. 
THE LARVA IN COCOON BEFORE PUPATING. 
se 
This period varies greatly, according to where the larva is kept, 
being much longer when confined with bits of paper, etc., in glasses. 
From about 100 specimens allowed to spin cocoons in ends of apples, 
either at the stem or blossom end, the average time during the months 
of July and August was seven to eight days from leaving the fruit 
to pupation, the minimum being one day and the maximum twelve 
days. 
THE PUPA. 
The actual duration of the pupal stage varies from a minimum of 
four (?) to a maximum of seventeen days, averaging about ten days. 
Seventy-four per cent of all pup observed in Arkansas developed 
moths in between eight and twelve days. The records in Washington 
agree very closely with those in Arkansas. 
