48 THE SAN JOSE SCALE. 
joints shortest, second nearly globular, inserted in the first; joints 4 
and 5 subeqnal, longer than any of the others; joint 6 next in length, 
and joints 3, 7, and 9 shorter and subequal; joint 10 still shorter, con- 
ical. Antennae somewhat hairy and nearly as long as the body of the 
insect. Wings, faintly dusky, iridescent with yellow and green. 
Length of body about 0.6 ra,n ; style, 0.25 mm . 
Female, third stage. — After the second molt the females still appear 
pale yellow as before with various larger and smaller transparent spots 
around the border of the body. The form is nearly circular with 
greatest diameter averaging 0.56 mm . The sucking bristles are very 
prominent and long, three times the length of the insect. The last 
segment in this stage has practically the characters of the mature female, 
as follows: There are two pairs of lobes, the terminal ones largest and 
nearly three times as broad as the other lobes. Terminal lobes are 
rounded at the apex and are distinctly notched near the middle of the 
external edge. The second pair of lobes is smaller and narrower and 
is also notched externally. Between the first and second lobe on 
either side is a small spine and two or three such spines are just back 
of the second lobe, while back of these are three stout teeth, curving 
anteriorly. A still smaller blunt tooth sometimes occurs near the mid- 
dle of the lateral margin. The segmentation of the body at this stage 
is quite distinct. 
Mature female. — After reaching maturity the embryonic young are 
at first not visible, but later the body becomes filled with them. The 
mature female measures 0.8 ram wide by about l mm long. ] 
The following description of this stage is reproduced from Comstock: 
The body of the female is yellowish and almost circular in outline; the segmenta- 
tion is distinct, though riot conspicuous. The last segment presents the following 
characters: 
There are only two pairs of lobes visible ; the first pair converge at tip, are notched 
about midway their length on the lateral margin, and often bear a slight notch on 
the mesal margin near the tip. The second pair are notched once on the lateral 
margin. 
The margin of the ventral surface of the segment is deeply incised twice on each 
side of the meson; once between the bases of the first and second lobes and again 
laterad of the second lobe. On each side of each of these incisions is a club-shaped 
thickening of the body wall. 
There are two inconspicuous simple plates between the median lobes, aud on each 
side similar plates extending caudad of the first incision, three small plates serrate 
on their lateral margin caudad of the second incision, and the club-shaped thicken- 
ings of the body wall bounding it, and three wide prolongations of the margin 
between the third and fourth spines. These prolongations are usually fringed on 
their distal margins. There are also, in some, irregular prolongations of the margin 
between the fourth spine and the penultimate segment. 
The first and second spines are situated laterad of the first and second lobes 
respectively; the third spine laterad of second incision; and the fourth spine about 
one-half the distance from the first lobe to the penultimate segment. 
1 Kept U. S. Dept. Agric, 1880, p. 304. 
