Puant Lice InyuriNG FoLIAGE AND FRUIT OF THE APPLE 749 
In general structural details and color markings they do not differ from 
the female fall migrants, and no further description is needed. 
The males on reaching the apple seek out the descendants of the female 
fall migrants and mate with them if they are mature. A single male 
mates indiscriminately with as many of the oviparous females as he can 
find. 
The oviparous female 
The immediate descendants of the female autumn migrants are known 
as the oviparous females. They are rather inactive, are smaller than 
the ordinary apterous summer forms, and are wingless. They are found 
on the underside of the apple leaves, but the writer has never found them 
causing a curling of the foliage similar to that caused by the spring forms. 
This form requires from twenty to thirty days to reach maturity, the 
nymphal stages varying greatly in length owing to the changing tem- 
perature conditions. 
The mature oviparous female (Plate XXVI) is from 1.2 to 1.5 mm. 
in length. The general color is lemon yellow, with a faint greenish tinge 
near the margins of the body; around and between the cornicles is a 
rusty-red reticulated area, which is very characteristic; the head is grayish 
and the eyes are black. The cornicles are cylindrical and are distinctly 
flanged at their distal ends. Thecaudais short and conical. The antennae 
are long. Sensoria are lacking, except a distal one on Segment V and 
the usual group at the base of the terminal filament of Segment VI (fig. 
118, 8B, page 715). The length of the segments is as follows: Segment III, 
0.16-0.2 mm.; Segment IV, 0.12-0.16 mm.; Segment V, 0.1-1.2 mm.; 
Segment VI, 0.32-0.34 mm. Lateral and dorsal tubercles are not present 
on the abdominal segment. Numerous sensoria are present on the hind 
tibiae (fig. 119, c, page 716). 
Oviposition.— The mature oviparous females migrate to the smaller 
twigs and branches. There mating usually takes place, and the eggs 
are deposited around the base of buds, under small pieces of bark, or in 
any sheltered position. The writer has not been able to determine the 
number of eggs laid by many females, but in the few experiments con- 
ducted from four to six eggs were laid. This agrees with the results of 
Baker and Turner (1916b), who record an average egg production 
of 6.3 for each female. 
