APHID PESTS OF MAINE. 



163 



Fig. 270. Antenna-I joint IV of male, showing sensoria. Fig. 271 

 Tarsus of male. 



Alate ■viviparous female. This form, together with nymphs, 

 was collected at Orono, July 20, 1905, from Abies balsamea. 

 The antennas is about 2.15 mm total length; III 0.9 mm; IV 

 0.325 mm ; V 0.45 mm ; VI 0.25 mm. Ill with about 10 large 

 sensoria ; IV with 3 sensoria in a row ; V with terminal sen- 

 sorium and one other ; VI with large sensoria in a group. The 

 beak is about 2.53 mm long. The wing (Fig. 299) is about 5.75 

 mm long. The veins are heavy except M and branches which 

 is very delicate as in the male. 



Figs. 272, 273 and 274. L,. curvipes.. Antenna of alate viviparous 

 female; and joints III and VI greatly enlarged. 



Apterous viviparous female. A large colony of this form and 

 nymphs was found on a young balsam fir about i 1-2 inches in 

 diameter. The size of the tree is given because this colony, 

 unlike the others of this species collected at Orono, was on the 

 trunk of the young tree one foot from the ground instead of 

 the branches. The mature forms were dull black with dark 

 reddish femora and black tibi?e. The newly dropped nymphs 

 were pale red. 



Fig. 275. L. ci:riipcs. Antenna of apterous viviparous female. 



