278 ReErorT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
Some of them still remained inactive under the bark. Careful 
search was made for eggs with the result that one cocoon con- 
taining eight eggs was found. Four of the eggs hatched. in 
the laboratory, November 19; the remainder did not mature. 
The eqgg.—The eggs are at first nearly white but finally change 
to a deep pink. The shell is membranous and covered with a 
white powder. An egg of average size measured .47 mm. by .23 
mm. In shape they are oblong, slightly oval and broadly rounded 
at both ends. 
The eggs are laid in cocoons of coarse silk placed under the 
loose bark. There is apparently no regularity in their arrange- 
ment in the cocoons. An abundance of white powder covers 
each one and may prevent their touching. 
The egg cocoon consists of two distinct parts, an outer coarse 
tent-like structure of coarse strands of white silk loosely woven 
and an inner cocoon-like structure more closely woven. The two 
are connected only by loose strands of silk. The inner structure 
is oval in shape and contains the eggs. It varies in size but meas- 
ures on the average about 2mm. by 5 mm. The cocoon is at 
first pure white and a beautiful object, but exposure to the 
weather finally changes it to a dull slate color. The average 
number of eggs in a cocoon was not determined. One examined 
contained eight. A cocoon showing inner and part of outer 
structure is shown natural size and, enlarged at Plate XX XIX, 
Fig. 2. 
The larva and adult.—The larvee closely resemble the adults. 
When first hatched they are deep pink, and within a few days 
become covered with a white powder. They are very active and 
move readily about on the bark. In all stages the insect feeds 
by sucking the sap from the bark. None were found on the 
leaves either in the larve or adult stages. 
The adults are active, soft-bodied insects measuring 3.5 by 
2mm. The color of the living adult is a dull dark green, covered 
with white powder similar to the larva. As with other species 
of this genus the margins of the body are irregular, each segment 
