732 RoBerRtT MATHESON 
The general color is dark green, with a row of small black spots on each 
side of the median dorsal line; the antennae, the eyes, two large quad- 
rate areas on the dorsal surface of the head, the legs, and the cornicles, 
are black. The sides of the body show a distinct whitish pulveruience, 
especially toward the end of the instar; the ventral surface is covered 
with a marked white pulverulence. The cornicles (fig. 111, B, page 684) 
are long and cylindrical, constricted before the apex, which is distinctly 
flanged. The antennae are 4-segmented, long, reaching about halfway 
between the end of the thorax and the base of the cornicles; the unguis 
is more than twice as long as the basal part of the segment (fig. 111, B, 
page 684). 
Second instar—— The second instar does not differ in any respect from 
the first except as to size. The whitish pulverulence, however, is more 
pronounced. 
Third instar.— Length 1.44-1.52 mm.; width 0.72 mm. 
The coloration varies greatly, not only in different individuals but in 
the same individual, during this instar; in general the dorsal surface is 
yellowish green mottled with yellow; the sides are darker green, and com- 
pletely covered with a fine white pulverulence; around the base of the 
cornicles and between them the color is reddish brown to red. The head 
is dark, with two tubercles on the hind margin. The antennae are 
5-jointed, pale on the basal third, on the remainder dusky to black. The 
eyes are prominent and black. The cornicles are cylindrical, shghtly 
flaring at their tips, brownish to black. There are pointed, black, lateral 
tubercles on the prothoracic segment and on all the abdominal segments 
except the last two; on the last two abdominal segments are black bands 
bearing a tubercle on each side of the median line. The cauda is scarcely 
visible, black. The legs are dusky to black. The ventral surface is 
covered with a beautiful white pulverulence. 
Fourth instar.— Length 1.9 mm.; width 1.04 mm. 
The general coloration is the same as for the preceding instar, but wit 
a tinge of bluish in the greenish ground color. The entire body is covere 
with a beautiful white pulverulence. The antennae are 6-jointed. Ther 
are no other differences between this and the preceding instar. 
Fifth instar, mature stem mother (Plate XX).— Length 2.25 mm.; widt 
1.44 mm. 
