IXSECTS AFFECTIXG PARK AND WOODLAXD TREES 2O5 



ments are marked by lateral spines and there is a row of six around the 

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

 back. The young soon become darker and tlnallv assume a yellowish red 

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

 and the general form of the young larva is retained [pi. 3, fig. 10, 13I. 

 The antenna of the female before impregnation is composed like that of 

 the young, of 6 sul^equal segments, the second ami third being the longest 

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

 nearly equal segments and a longer seventh. 



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

 plate 3. The presence of the perfect insect witliin may be known bv the 

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

 search. It is a delicate, two winged, reddisli insect witli rather larcre 

 antennae, and a pair of white anal filaments nearly twice the length of its 

 body I ])1. 3, fig. 18 1. It moves slowl\- 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 alread)- been described, 

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

 of males which are characterized by the possession of wing pads but no 

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

 17, 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, ^Ia\' and June, at which time the females are preparing to give birth 

 to their )-oung, 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 twigs. 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 



