THE CALIFORNIA PEACH BORER. 81 
Numerous records of oviposition by moths which were confined in 
cages indicate that the favorite place is on the lower surface of the 
leaves (Table V1). 
TaBLE V!1.—Oviposition of moths of the California peach borer within the rearing cages. 
uses A On On 
: : placed on n upper } 
Cage No. wood of branches. | surface lanes Total. 
cage. | of leaves. | SUtaces. 
pee eS ait eg NG ISS INS hie eh aw kale 55 16 14 119 204 
Ee eo Soh SSO RE wc Us eeaeseles Dovoeetcce 66 49 53 168 
ee ee se Be sae Re Se See ee = Ane cine decline eemasadd aSaloaecidle wate ce 272 474 746 
2h enna Sate DOBRO EE AEE a baa 3 8 Soe eee [eee ae 20 144 40 204 
CL ee A A ars Seneca eins Hs a secure aS we EE ae [boos Seopa llmitee SEE leas 48 220 268 
CR eee eae oe ee Sori Se ee A eR 55 66R)s8- tee. - 102 223 
ANGIE: GSS ie cee ae Res Sate oe at eee ee is 110 168 527 1,008 1,813 
} 
Moths flying in the open field always place their eggs on the lower 
trunk a few inches above the surface of the ground. The eggs are 
arranged in groups as in the rearing cages. A careful examination of 
branches and leaves of several trees in a badly infested orchard 
showed no eggs elsewhere than on the lower trunk, but many groups 
of eggs were found on individual trees. A moth was once observed to 
fly and alight on the trunk of an apricot tree about 5 inches from the 
ground. She soon moved 2 or 3 inches higher and remained there 
about two minutes, placing about 12 eggs; she then flew rapidly away 
until she was lost to sight. Thirty other eggs which had been placed 
at some previous time were also observed near this group. All were 
within a radius of 2 inches and were grouped in numbers of from 3 to 
10. They were not definitely arranged. Clusters of eggs can be found 
easily on the lower trunks of trees in any badly infested orchard. 
The eggs on a single five-year-old apricot tree in the open field 
(Kelly orchard) were numbered and grouped as follows: 2, 3, 3, 6, 8, 
8, 9, 10, 27, and there were about a dozen scattered, singly-placed 
eggs. All were between 1 and 2 inches above the surface of the ground. 
On a second tree 44 eggs, all near the surface, were grouped as fol- 
lows: 1, 1, 1, 2, 2, 2, 2, 4, 6, 8, 13. AIL the eggs on both these trees 
were hatched when examined (Aug. 10, 1908). 
Records of oviposition by individual moths may be listed as fol- 
lows: 294, 275, 205 (6+199 dissected), and 412. Eight unmated 
females which were placed in confinement oviposited as follows: 5, 6, 
11, 11, 25, 43, 50, 83, and in each case the moth died before the second 
day. 
Table VII, which is a record of oviposition by individual moths, 
indicates how soon oviposition begins after mating, how long it con- 
tinues, the number of eggs placed, and the life of the moth. All 
moths were introduced into the individual cages immediately after 
they were taken from the trap cages in the field. 
