APHID PESTS OF MAINE, II. WILEOW FAMILY, 



79 



Fig. 29. C. populicola. Antenna of alate female. 

 Fig. 30. Antenna of apterous female. 



Apterous vnnparous form. Head and antenna black with 

 III pale. Abdomen black dorsall}'- and highly polished, ventral 

 side paler and brownish. Cornicles light almost white. The 

 progeny of these are reddish brown with a distinct yellowish a 

 the stem of which extends to front of head, the fork coming 

 on the abdomen and being much more distinct than the stem. 

 Another yellow spot at caudal part of abdomen, and cornicles 

 are very pale. Body mottled with black specks. Antenna 

 brownish with III pale. Fig. 30. Legs brown. 



Collection data as follows : — 



47-04, Orono, June 23, 1904. Dark apterous females and 

 nymphs on Aspen Poplar. 



47-05, Veazie, Aug. 15, 1905. Balsam Poplar. 



33-06, June 18, 1906. Both winged and apterous viviparous 

 females on Balsam Poplar. 



59-06, July 3, 1906. Both apterous and winged viviparous 

 females and pupa; on Aspen Poplar. 



93-06, August 3, 1906. Both apterous and winged viviparous 

 females on Aspen Poplar. 



13-08, June 19, 1908, \'eazie. Winged and apterous vivi- 

 parous females, pupae and nymphs on leaves and tender shoots 

 of Balsam Poplar. 



39-08, Veazie, Jiily 10. 1908. AMnged viviparous females 

 and nymphs on leaves and tender shoots of Balsam Poplar. 



40-10, Veazie, June 29, 1910. Winged viviparous female and 

 her progeny on ventral side of Balsam Poplar leaf. 



41-10, Veazie, June 29, 1910. \\'inged and apterous females 

 and nymphs on Aspen Poplar. 



56-10, Orono, July 12, 1910. \\'inged and apterous females 

 an 1 nymphs on Balsam Poplar. 



