APHID PESTS OF MAINE, II. WILLOW FAMILY. 



83 



Fig. 36. A. popiilifoliae. Antenna of alate female. Fig. 37. Joint 

 III of same from another individual. Fig. 38. Antenna of apterous 

 female. Fig. 39. Cornicle of same. 



Habitat of this species on new growth twigs but especially 

 on dorsal surface of leaves causing a slight longitudinal curl 

 upward. Found on Popithis balsmnifcra, P. trcinuloides, and 

 certain other species of Popuhis. 



Collection data: 58-06. One apterous viviparous female 

 with progeny on dorsal leaf. Two alate viviparous females 

 with progeny on dorsal leaves. Populus halsamifera and P. 

 tremuloides July 3, 1906. 



20-08. Apterous viviparous females and progeny. Populus 

 sp. Orono, June 22, 1908. 



36-08. A mass of this black and white species with a black 

 and white larva of a lady beetle made one of the prettiest 

 "coloration" schemes I have ever seen. Populus sp. terminal 

 leaves and tender shoots. Orono, July 9, 1908. 



70-08. Winged viviparous female and pupse on balsam 

 poplar (tender growth of water sprout). Orono, Aug. 25, 

 1908. 



58-10. Apterous viviparous females and progeny on dorsal 

 surface of leaves of Populus halsamifera causing a very slight 

 upward curl of leaf. Orono, river bank, July 12, 1910. 



77-10. Apterous and alate viviparous females, nymphs and 

 pupse on P. halsamifera on dorsal surface of leaves causing 

 slight curl upward. Orono, river bank, July 23, 1910. 



95-12. Apterous and alate viviparous females and nymphs 

 on dorsal surface of leaves of balsam poplar turning the edges 

 of edge and more or less crumple. Also present in galls of 

 Pemphigus gravicornis, Veazie Sand Bank, July 18, 1912. 



ic6-i2. Alate and apterous viviparous females and nymphs 



