INSECTS AFFECTING PARK AND WOODLAND TREES 



205 



mrnts are inarkcil hy lateral spines and there is a row of six around the 

 anterior border of the head and an irregidar row down the middle of the 

 back. The youno- soon become darker ami finalh- assume a yellowish red 

 color. The dorsum becomes covered with spiny, wax secreting processes, 

 and the general form of the )oung lar\a is retained | pi. 3, fig. 10, 13]. 

 The antenna of the female before impri'gnation is composcnl like that of 

 the young, of 6 subequal segments, the secoml and third being tlu; lon<'-est 

 and the fourth and fifth shortest. The antenna of the immature male has 6 

 nearly equal segments and a longer seventh. 



The oval cottony ciKoon of the male is well shown at figures 11, 12, 

 plate 3. The presence of the ])erfect insect within may be known h\ the 

 two long, protruding anal filaments. The male is not seen without special 

 search. It is a delicate, two winged, reddish insect with rather lar<re 

 antennae, and a })air of white anal filaments nearly twice the length of its 

 body [pi. 3, fig. 18J. It moves slowly over the limbs in a clumsy way, is 

 not easily disturbed and rarely takes wing. A most interesting feature is 

 the occurrence of two forms. The normal one has already been described, 

 but 10 days earlier than its occurrence there may be found large numbers 

 of males which are characterized by the possession of v>'ing pads but no 

 wings. These are known as pseudimagos and one is represented at figure 

 1 7, plate 3. The reason for the existence of two forms of males is 

 unknown. 



Life history. This insect is most conspicuous during the months of 

 April, May and June, at which time the females are preparing to give birth 

 to their young, which make their appearance in the latitude of Albany early 

 in July. The new born insects move readily over the bark for a time and 

 then settle along the veins of the leaves, principally the midvein, and in 

 large numbers on the greener tips of the twig.s. Occasionally a twig will 

 be almost yellow from the large number of young nearly covering it. 

 Others establish themselves in crevices among the old females. They 

 remain in these positions till into September or later and then those on the 

 leaves migrate to the twigs. Some do not take this precaution soon 



