MAIN]5 APHIDS OF THE ROSE FAMILY. 259 



leg with femora pale proximally and dark distally, tibia pale 

 except distal point, tarsus black; cornicles long tapering and 

 black, Cauda black, abdomen glabrous black. 



A collection made Sept. 14 (80-11) comprised sporadic 

 alate females, apparently recently aligihted, with young nymphs 

 on leaves of wild cherry. As will be seen by Fig. 92, H, the 

 antenna differs from that of the earlier females in having fewer 

 sensoria on III. 



The Maine collection numbers are, 38-14, June 14, apterous 

 females, nymphs and pupae; 1-05, May 31, apterous females 

 and pupae nearly ready for the molt to alate females; 14-05, 

 July 3, alate and apterous females; 21-06, June 12, apterous 

 females and colonies; 38-06, June 21; 57-06, July 3; 127-06, 

 July 6; 9-08, June 16; 107-10 apterous females and pupae, 

 August 30; 80-11, Sept. 14, winged females sporadic on leaves 

 with young nymphs; 42-13, June 8, apterous females and 

 nymphs; 59-13, June 23, apterous and winged females. 



Aphis furcata. n. sp. 



(Figure 94, F. Figure 95, C.) 



A tiny aphid on choke cherry (Prunus virginiana) re- 

 sembles avenue in having the second branch of M very 

 near the margin of the wing, but is distinguished by 

 having antennal III with 7 to 12 sensoria in a row, 

 IV and V about equal in length, IV with usually one sensorium 

 (sometimes more, sometimes none) about midway, and total 

 antennal length nearly equal to the body length. The cornicle 

 is straight to tip, without the distal constriction and flange 

 which is conspicuous in avenae. The antennal characters of 

 furcata are much like gossypii; but it can be distinguished by 

 the wing and cornicle, M branching nearer the margin in fur- 

 cata and the cornicle being shorter. In life the color scheme 

 is different. 



The head and antenna are dark, the eyes black, the beak ex- 

 tends to second coxa; prothorax dark, membrane lighter, lat- 

 eral tubercles prominent ; thorax greenish with dorsal IoIdcs and 

 ventral shield black ; wings with slender dark brown veins ; 

 abdomen green, unmarked except 3 lateral dots in a row ; cor- 

 nicles dark brown; cau^a lisrht. 



