INSECTS AFFECTING PARK AM) WOODLAND TREES iSs 



She is light yellow in color and about ' , inch long-. The light yellow eggs 

 are very abundant in the waxy secretion, and measure about '/;; inch in 

 length. The young female is pale yellow, elongated oval, antl tapers gently 

 toward each end. The young male is reddish )-ellow, and the adult red. 

 The young remain on the leaf after emerging from the eggs, unless it is 

 too crowded, when they crawl down the petif^le and seek food on a hc^althy 

 leaf. The males on attaining full growth, become restless and wander over 

 the trunks and limbs for from 7 to 10 days and finalh' secrete themselves 

 beneath the rougher outer bark of the tree and transform to ]Hipae. The 

 white, oval male cocoons were present in thousands on the bark of the liard 

 maples under observation at Albany in igoi. The perfect insects ajipear 

 in about 15 days, and by this time the females have attained maturity, left 

 the leaves and are wandering about on the limbs or trunk. The growth of 

 the females is rapid after pairing and they soon settle on the umlersioo of 

 the leaf, seldom crowding each other. ?\Iiss Smith states that not more 

 than three or four remain on a leaf, while Dr Howard records as man}- as 

 13 on the underside of a single leaf, and specimens collected at i\lbany 

 have borne nearly as many. The wax)' secretion soon becomc's ver\- dense, 

 and the eggs are pushed out into it, Ijoth the secretion and the number of 

 eggs increasing proportionally. One individual may deposit over 500. Miss 

 Smith's observations at Peoria showed that there were three generations 

 each year, and that the winter is passed by young in crevices of the larger 

 limbs and in that latitude they may be quite active during warm days. 

 The second brood hatches in June, and the third in August, the young of 

 the latter generation over-wintering. I)r Howard calls attention to the fact 

 that the young of all generations have, the habit of migrating to the trimk 

 of the tree, in the earlier generations, however, they remain on the bark lor 

 only a short period, while the young of the last, as previously stated, winter 

 on the trunk. 



Natural enemies. Miss .Smith succeeded in breeding a minute Chalcid 

 tl\', Rhopus CO ceo is Smith, which frecpicntly deposits its eggs on the 

 female about the time of oviposition. JNIiss .Smith also observed a syrphus 



