8o Maine; agricultural experimlnt station. 1913. 



70-10, Veazie, July 21, 1910. On leaves and petioles. 

 Apterous females very dark, — some entirely black except for a 

 yellow mark on cephalic portion of abdomen and whitish yel- 

 low cornicles, — others yellowish brown as usual. Newly 

 dropped nymphs orange yellow. Winged forms also present. 



71-10, Veazie, July 21, 1910. On leaves and petioles of 

 Aspen Poplar. Alate females and small dark apterous females. 



5-1 1, Orono, July 14, 1911. On petioles and new growth 

 twigs of Cottonwood. Alate viviparous female. 



96-12, Veazie, July 18, 1912. Apterous and alate females, 

 on Balsam Poplar leaves and also in galls of Pemphigus gravi- 

 cornis. 



Chaitophorus delicata n. sp. A tiny species which I had 

 not seen before and which appears to be undescribed was col- 

 lected from the leaf of Aspen Poplar {P. tremuloides) by 

 Mr. William C. Woods last summer. 



The apterous females, nymphs and pupse, were all a pellucid 

 water white with a vivid green mark on prothorax, a transverse 

 green stripe on first abdominal segment, and a green blotch in 

 the region of the white cornicles more or less connecting them. 

 Fig. 31 shows the relative length of the antennal joints. 



Fig. 31. C. delicata. Antenna of apterous female. 



No winged forms were obtained. 



Collection data as follows : — 



104-12, Veazie, July 18, 1912. Leaf of Aspen Poplar. A 

 small collection of apterous females, nymphs and pupae. 



1 19-12, Orono, July 29, 1912. A small collection from ven- 

 tral leaf of Aspen Poplar. Apterous females, nymphs and one 

 pupa. 



Chaitophorus viminaHs Alonell ? Until the life cycle of 

 this species with careful detailed descriptions of the successive 

 generations has been worked out by some one I refrain from 

 definitely attributing AJaine collections to either vhninalis or 

 nigrae as at present I am too much confused to contribute any 

 aid to the situation. What I take to be viminaHs has two suc- 

 cessive generations of apterous forms which are so dififerent 



