101 



New York State College of Forestry 



Fig. 43. — I'si/liia trimuvnlata Crawford: a, adult female dorsal 

 view; h, fore winp;; c, female; d, male gjenitalia; e, nymph of last 

 instar with flocciilent mass removed. 



behind, bearing a large mass of floceiilent waxy filaments, easily 

 detached but when the insect is moving giving the appearance of 

 animated bits of fiuffj^ cotton. The appearance of these cottony 

 masses is well shown in the photo plate (Fig. 43). There are 

 long whitish bars on the margin of wing pads and abdomen ; the 

 legs with few hairs. 



Adult males were appearing fairly common July 7 and 8 and 

 females on the 8th and 9th. Nymphs were still present on fire 

 cherry July 20 but practically all have emerged as adult and very 

 few of the cottony masses remain as compared with a week earlier. 

 Many of the adults collected on fire cherry as well as from other 

 vegetation have the orange red or red markings given as char- 

 acteristic of ^-macidaia, later appearing adults seeming to furnish 

 a greater proportion of the red marked individuals. Extended 

 search for nymphs has failed to show any on alder or other plants 

 on which adults are common. On August 1 no nymphs Avere to 

 be found but occasional tufts of the cottony secretions and molted 

 skins were still hanging to the leaves. 



Adults taken July 28 from cherry — agreeing in every detail, 

 except color, with earlier specimens — are nearly all deep blood 

 red on the dorsal lobes of pro- and meso-thorax. As earlier col- 

 lections and reared specimens for the early part of the month 

 were less distinctly marked it appears probable that the different 

 coloration is a seasonal feature due possibly to later maturity 'in 

 nymphal stage, or to difference in temperature or other conditions 



