l80 NKW YORK STATE Ml'SEUM 



Doihaii Ala. in 1899, bcijan to lialch the latter part of May, and a sendinjf 

 from Kno.wille in the same year was unhatched June 6. The secretion of 

 the et(*,^ sac and the deposition of eggs in the mass of wax and fibers com- 

 posing the sac began in Washington late in May and continued gradually 

 till the middle of June, young beginning to hatch on the 13th. The 

 recently hatched larvae are a pale yellowish color, with a slightly brownish 

 median line and dark purple eyes. July 31 the first molt occurred and the 

 young were still a very |)ale yellowish white color and almost transparent, 

 though a very few specimens were marked with a pale purplish spot near 

 the extremity of the body. The growth from this time till October, at 

 which time the second skin was cast in 1899, was very slow. The thinl 

 stage however was observed as early as June 26, 1898. The young had 

 deserted the leaves in 1899 by Oct. 15. They were at this time of a pale 

 brownish )ellow color, somewhat darker along the median line, and were 

 characteristically marked with a large reddish, almost crimson, medio-dorsal 

 spot on the prothoracic segment, and willi a similar one just in front of the 

 anal cleft. The c\es were minute, black, and nearly twice as large as 

 i)efore. Most of the larvae had settled for hibernation on the trunk 

 by Oct. 21 and ihcii the sexes could be distinguished. The ftMiiales 

 are recognized b\' tlieir more broadh' o\-,il shapes. At aljout tin: time the 

 migration to the twigs began, late in October, the great majority of the 

 young were located along the ribs on the underside of the leaves, though a 

 large number were also found on adjoining twigs, generalh' in and about 

 the forks, in excrescences or near buils or other projections. They run 

 about cjuite actively at this time in search of suitable places for hibernation, 

 and a delicate layer of waxy secretion appears which gi\es the insect a 

 somewhat grayish apjiearance. Nov. i, 1898, all the young had settled for 

 hibernation, and were of a consitlerable darker color, harmonizing well with 

 the bark. There was little or no change in their condition in December 

 and the same was jjractically true; at the entl of the following March. Males 

 and females were found .April 8 on pottt'd trees. The latter were of a dark 

 ]nir|)le color with a vellow median ridge. The tirst male transformed to a 



