2()2 THE CANADIAN ENTOMOLOGIST 



was reproducing: and developed large colonies at Wye in August 

 and September 1911, which gave rise to an alate brood which 

 migrated during the latter month. It is possible that Scopoli's 

 Aphis pruni is this insect. 



Aphis pomonella nov. sp. 



Alate viviparous female: 



Antenna' shorter than body; first segment larger than the 

 second; third a little longer than the fourth, shorter than the sixth, 

 with 5 to 6 round sensoria along its whole length; fourth about 

 the same length as the fifth, the latter with normal sub-apical 

 sensorium; sixth about as long as fourtl' and fifth, its basal area 

 half as long as the llagellum. All ilie segments imbricated, the 

 two basal ones dark; base of third and basal half of fourth paler. 

 Head with slight lateral tubercles and slightly raised in the middle. 

 Proboscis reaching to the third coxa\ acunn'nate. Pronotum with 

 lateral papilla*. Head ai^parently brownish and green. IC\es 



B 



Fig. 9. — Aphis pomondia nov. sp. A, Head and antenna of alate viviparous female; a, 



head ot pjiother specimen. B, .4. kochii; b, hind tibia. C, Siphocoryne 



avenae: c, hind tibia. 



dark. Thoracic lobesdark. Abdomen apparently greenish with three 

 large, dark lateral spots before the cornicles. Cornicles moderately 

 long, black, slightly swelling towards the base, markedly imbricated 

 and serrated laterally. Cauda blackish, about half the length 

 of the cornicles, spinose with three pairs of lateral hairs. Anal plate 

 dark, spinose, with two long, apical hairs on each side. A large 

 papilla on each side between the c<jrnicles and cauda, and traces 

 of 3 lateral abdominal ones between the cornicles and thorax. 

 Front legs green with black apices to the tibia; and black tarsi; 

 hind legs with dark femora, except at the base; coxa? black. Wings 

 normal, veins and stigma \ellowish brown to yellowish green. 



