444 
Journal of Agricultural Research 
Vol. XXX, No 5 
WINGED VIVIPAROUS FEMALE (PL. 2, A) 
Color characters: The general color¬ 
ation is black. Head dark brown; eyes 
dark red, ocelli yellowish; antennae 
varying from pale yellow to dusky; 
beak yellowish, darker toward the tip; 
prothorax black, with anterior and pos¬ 
terior margins greenish, mesothorax and 
metathorax shining black, suffused with 
brown on the sides, legs yellowish; tarsi 
darker; abdomen greenish, with lateral 
margins of segments 1 to 5 with spotted 
black; cornicles brownish; cauda and 
genital plate green; anal plate black. 
Morphological characters: Antennae 
six jointed, joints 3 and 4 sometimes 
indistinct, third segment with three 
sensoria; prothorax with two lateral 
tubercles; abdomen with a very small 
lateral tubercle; cornicles long, tubular, 
and flanged at the tip. 
Measurements: Length, 1.3 to 1.8 
mm., width, 0.7 to 0.8 mm., antennae, 
length, 0.9 to 1.1 mm.; segment No.l, 
0.05 mm.; segment No. 2, 0.05 mm.; 
segment No. 3, 0.19 to 0.24 mm.; seg¬ 
ment No. 4, 0.12 to 0.18 mm.; segment 
No. 5, 0.13 to 0.16 mm.; segment No. 
6, 0.35 to 0.40 mm.; cornicles, length, 
0.2 to 0.22 mm. 
OVIPAROUS FEMALE (PL. 2, C AND E) 
Color characters: General coloring 
yellowish-green; head yellowish-brown, 
sometimes greenish on posterior half; 
antennae with segments 1, 2, and basal 
portion of 3 pale yellow, remainder of 
segments darker; eyes dark red; beak 
greenish at base, pale yellow at middle, 
and dark at tip; legs pale yellow, tarsi 
darker; cornicles brownish, darker at 
tip; cauda dusky, clothed with whitish 
hairs; margins of abdomen greenish, 
with center of dorsum yellowish when 
the abdomen is distended with eggs; 
posterior abdominal segments more or 
less covered with a whitish pulveru- 
lence; genital plate greenish, with two 
circular yellowish areas on either side; 
anal plate dark green. 
Morphological characters: The body 
is more elongate and narrower than in 
apterous viviparous female, tapering 
posteriorly. Antennae (pi. 3, H) six- 
jointed as in viviparous female; thorax 
with lateral tuberlces on prothorax; 
hind tibia (pi. 3, I) with about eight 
sensoria, not at all swollen, and hardly 
to be distinguished from the other forms; 
abdomen with a tubercle on either side; 
cornicles short, tubular, and flanged at 
the tip (pi. 3, E); genital plate more 
rounded than in the apterous viviparous 
female. 
Measurements: Length, 1.2 to 1.5 
mm.; width, 0.6 to 0.7 mm.; antennae. 
segment No. 1, 0.05 mm.; segment No. 
2, 0.05 mm.; segment No. 3, 0.28 mm.; 
segment No. 4, 0; segment No. 5, 0.12 
mm.; segment No. 6, 0.10 to 0.24 mm.; 
cornicles: length, 0.12 mm. 
MALE (PL. 2, D AND F) 
Color characters: General coloration 
brownish-yellow, mixed with green; 
antennae brownish-yellow, sensoria 
darker; head brownish, darker on pos¬ 
terior half; eyes dark brown, beak pale 
yellow, tip brown, thorax greenish; legs 
yellowish, with coxae, trochanters, and 
tarsi darker; cornicles brownish, darker 
at the tip; abdomen brownish spotted 
with pale yellow in the center, posterior 
segments dusky; cauda dusky, clothed 
with whitish hairs; genital plate brown¬ 
ish; anal plate black. 
Morphological characters: Body 
short and broad; antennae about as 
long as the width of the body, six- 
jointed, with five to seven sensoria on 
segment 3, and one sensoria on each of 
segments 5 and 6; prothorax with 
small tubercles; abdomen with lateral 
margins flattened, a lateral tubercle on 
each side; cornicles short, tubular, 
slightly curved, and flanged at the tip; 
genital plate bears two claspers clothed 
with spines and hairs. 
Measurements: Length, 1 mm.; 
width, 0.64 mm.; antennae, segment 
No. 1, 0.04 mm.; segment No. 2, 0.04 
mm.; segment No. 3, 0.20 mm.; seg¬ 
ment No. 4, 0; segment No. 5, 0.088 
mm.; segment No. 6, 0.058+ to 0.18 
mm.; cornicles, length, 0.12 mm. 
SPRING FORMS 
The majority of the second genera¬ 
tion of the insect becomes wingless 
viviparous females (pi. 2, B, and pi. 3, 
F, G), although some winged ones are 
often present and distribute the species 
to other strawberry plants or beds. 
The young of the second generation are 
pale yellowish-green in color, in con¬ 
trast to the dark green of the stem- 
mothers. The second and succeeding 
generations are usually found feeding 
on the pedicels of the young tender 
leaves, but are often deeply imbedded 
in the crown of the plant. They are 
sometimes located on the roots of the 
plants, but in Tennessee this is rare. 
Large numbers of plants were pulled 
to determine the location of the lice, 
and, except in a few cases, they were 
present on the pedicels of the young 
leaves. A generation of lice is pro¬ 
duced about every 14 days throughout 
the summer, with winged ones appear¬ 
ing in each generation after the first. 
