THE CALIFORNIA PEACH BORER. 79 
EARLIEST, MAXIMUM, AND LATEST APPEARANCES OF MOTHS. 
The first moth during the season of 1908 was found resting on an 
apricot leaf near the crotch of a tree on April 16, and on May 15 
another was seen in a similar position. On these same days two or 
three empty cocoons were found, which indicated that other moths 
had also emerged. The data in Table V indicate the period when 
moths are flying. 
TaBLE V.—Records of emergence of moths of the California peach borer, 1908-9. 
1908 record, Kelly orchard, 35 trees. 1909 record, Henly orchard, 19 trees. 
Date. Males. Females. Total. Date. | Males. Females. | Total. 
2 1 3 || July 3 0 3 
1 5 6 3 0 3 
4 2 6 4 1 5 
9 2 11 8 6 14 
9 1 10 B 2 4 
9 ili} 20 || Aug. 1 3 4 
10 10 20 1 IF 1 6 
8 12 20 3 8 11 
8 11 19 ’ 7 5 12 
ATIC SOs te bes 2 rau 6 13 ADP |immepiiir aasoreueeces 3 1 4 
LQ reese 10 10 20 Os 32S eee 0 0 0 
1 de See 0 3 3 hy ee Sn a 1 1 2 
+247 (Te Pi es it 3 4 HARA Sa e| 0 1 1 
Sept. these. 0 1 1 SOULE ae | 1 0 1 
2 ee 0 0 0 
POR eee 77 85 162 Motalnc Ss-< 41 | 29 | 70 
These records of emergence of moths for the two seasons of 1908 
and 1909, respectively, were taken from series of wire-mesh traps 
(Pl. X, fig. 2), which were placed around the lower trunks of 
apricot trees. During the season of 1908 the records were made in 
an uncultivated orchard about 3 miles from San Jose. Thirty-five 
wire cages were placed around as many trees, and the moths which 
emerged were collected at regular intervals of a week, except that 
they were collected every two or three days during the period of 
maximum emergence. The records for the season of 1909 represent 
moths collected from the cages which had been placed around apricot 
trees in another orchard. 
A perusal of the table indicates that an average of 5 moths emerged 
from each of the 35 traps during the season of 1908, An average of 
8 moths per tree and a maximum of 27 moths from a single tree were 
recorded during the season of 1909. The record of 1908 shows. an 
emergence of more females than males, and the records of the fol- 
lowing year just the opposite. This fact probably has no special 
significance, since the totals in either case are not sufficiently large 
to be of value in determining the relative number of either sex. A 
few moths are thus to be seen flying in April and May and many more 
during July and the first half of August. A few late individuals 
appeared during September. 
