34 BRITISH APHIDES. 



Apterous oviparous female. 



Hirsute, greenisli yellow, with two involuted black 

 marks on the thoracic region, and three black con- 

 fluent bands on the abdomen. The antennge are short 

 and ringed with black. Legs green, with isolated black 

 spots at the tips of the femora. Cauda rounded. The 

 example figured was captured at the end of July, and 

 even at that early season it contained two large eggs. 

 Walker obtained females with four eggs. The same 

 observer describes the male as winged, like the vivi- 

 parous female, but more slender of form. 



This species feeds, and close to the rib-veins, on the 

 under surfaces of the leaves of the walnut tree, Juglans 

 regia. It occurs from May to October, but it is not 

 common. 



Pterocallis TiLiiE, Linn., Plate XOIII. 



Aphis tilice, Linn., Eeaumur (?),De Geer, Schr., Walk. 

 Callipterus tilice, Koch. 

 Pterocallis tilice, Pass. 



Apterous viviparous female. 



Incli. Millimetres. 



Size of body 0-080 X 0-035 2-02 X 088. 



Length of antennse 0*060 1-52. 



cornicles 0-005 0-12. 



Long oval, shining green or yellowish. Head and 

 prothorax black. Eyes red. Thorax with a large 

 square spot flanked on each side by another spot. 

 Abdomen domed and crossed by numerous black bands. 

 Carina with spots corresponding to the same. An- 

 tennae, tail, and legs green ; the former ringed with 

 black. A distinct and fine line cuts across the occi- 

 pital and the five or six abdominal fasciae. Some 

 individuals are almost uniform in colour and without 

 bands 5 



