24 



The Green Spruce Aphis 



Head yellowish-green to fawn colour, with two foveae ; a small pro- 

 minence on each side of the head at the base of the antennae. 



Antennae about half the length of the body, pale yellowish-green, 

 darker at the tips, the first segment very wide, second small and narrow, 

 third longer than the fourth, the fourth a little longer than the fifth, the 

 sixth about as long as four and five, the basal area as long as the fla- 

 gellum, which is blunt ; all the segments markedly imbricated. 



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Aphis ahieiina Walker. A. Antenna of alate female a. further enlarged third seg- 

 ment. B. Antenna of apterous female. C. Cornicle of alate female. 



Eyes dull red. Proboscis green, dusky at the apex, reaching to 

 the third coxae. 



Cornicles pale yellowish-green, some with a brownish tinge, apex 

 in some dusky, about one-fourth the length of the body, a few lines 

 and large reticulations at the apex, remainder strongly imbricated. 

 Legs green, tarsi, tips of femora and the tibiae dusky. Cauda green, 

 rather long. 



Length, 1 to 1*5 mm. 



Winged viviparous female. 



Green. Head large, a pale olive green to pale fawn colour ; 

 antennae nearly as long as the body, pale brown, the third segment 

 with 9-12 large sensoria along its whole length, the fourth shorter 

 than the third, with 2-4 sensoria ; the fifth slightly shorter than the 

 fourth, with a sub-apical sensorium, the sixth not as long as four and five 

 together, the basal area only a little shorter than the flagellum ; all the 

 segments markedly imbricated. Head with two prominent but small 



