Puant Lice InsurRiInc FoLIAGE AND FRuIT OF THE APPLE 755 
An interesting feature of this situation is the great number of the 
young viviparous females that undoubtedly perish thru the falling of the 
leaves. On a hawthorn near the Cornell University campus, great num- 
bers of migrants had settled in the fall of 1914. The oviparous females 
began oviposition on October 20. They probably reached their maximum 
numbers on the foliage about October 28, on which day there was a severe 
frost. By the evening of the 29th practically all the leaves had fallen, 
destroying thousands of the still immature oviparous females. Similar 
occurrences took place on neighboring apple trees, tho the falling of the 
leaves was not so marked. As a consequence comparatively few eggs 
were laid. This undoubtedly happens every year, particularly when 
there are early frosts followed by high winds. 
Description of fall migrants 
Winged viviparous female (Plate XXVIII).— The winged viviparous 
female is from 1.6 to 2 mm. long. The head, the pronotum, and the 
thoracic lobes are black, the last-named shining; the pronotum may be 
margined in front and behind with a narrow band of dark green, but these © 
bands do not show clearly in many specimens; the antennae, the eyes, the 
distal lobes of femora and tibiae, and the tarsi, are black; the abdomen is 
green, with from three to four black spots on each side in front of the 
cornicles and a narrow black band at the base of the abdomen; caudad of the 
cornicles are a dark area on each side and one or two narrow dusky to black 
bands across the tip of the abdomen; the cauda is brownish or greenish 
brown; theanal plate is black; the legs, except as noted above, are yellowish 
green; the cornicles are brown to pale greenish brown. The cornicles are 
cylindrical, constricted somewhat at the base and before the apex, which 
is flared somewhat irregularly (fig. 115, F, page 706). The length of the 
antennal segments and the number of sensoria are as follows: Segment 
III, 0.32 mm., sensoria 12-16; Segment IV, 0.16 mm., sensoria 4-6; 
Segment V, 0.18 mm., sensoria 2-4; Segment VI, 0.8 + 0.46 mm., sensoria 
the usual group. 
Winged male.— The winged male is from 1 to 1.5mm. long. The general 
color markings are similar to those of the female, except that the abdomen 
is usually yellowish brown marked with considerable black in front of 
and between the cornicles; the antennae are black and about as long as 
the body; the cornicles are dark brown to black, and are similar in shape 
