278 IvEPORT OP THE DEPARTMENT OF ENTOMOLOGY OF THE 



Some of them still remained inactive under the bark. Ciareful 

 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. 



Tlw egg. — 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 me'asured .47 mm. by .2.'^ 

 mm. In shape they are oblong, slightly oval and broadly rounde^l 

 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 abund'ance 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 wovtMi 

 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 2 mm. by 5 mm. The cocoon is at 

 first pure white and a beautiful oibject, 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 XXXIX, 

 Fig. 2. 



The Imxa and adult. — The larvne 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 larvae or adult stages. 



The adults are active, soft-bodied insects measuring 3.5 by 

 2 mm. 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 



