26 i3RITISfl APHIDES. 



This species seems to vary considerably as to size 

 and form, so much so, as to leave me in some doubt as 

 to whether the insects I now describe are really iden- 

 tical with those of Kaltenbach and Walker. Kalten- 

 bach mentions the occurrence of a green tubercle which 

 is furcate on the second ring (abdominal ?), and that 

 two or three tubercles are to be found on the lateral 

 edges. Neither of these characters are given by 

 Walker, and I do not find them in my specimens as 

 thus set forth. 



Taken on Quercus robur at Weycombe and at Wan- 

 stead, Essex. According to Passerini the Italian 

 insects are all more or less clothed with down. 



Oallipteeus CASTANET, BucMon. Plate XCI, figs. 5 — 9. 

 Callipterus castanew. Pitch (?). 



Apterous viviparous female. 



Inch. Millimetres. 



Size of body 0"060x 0=035 1-52 X 0-88. 



Length of antennsB 0'035 0*88. 



„ cornicles 0-002 0-05. 



Body ovate, somewhat flat, pale green or yellowish. 

 Front convex, and furnished with bristles. Head and 

 thorax broad. Two rows of dark brown or greyish 

 spots, eight or nine in number, ranged down the dorsum, 

 which rows are continued through the thorax. Four 

 or five similar marks occur near the stomata. An- 

 tennse pale green, with black articulations. Eyes black. 

 Tail rounded and hairy. Eostrum very short. The 

 whole body covered with capitate hairs. 



This insect is somewhat solitary in habit. It is 

 plentiful at Haslemere in the copses of the sweet chest- 

 nut, Castanea vesca, from early May to December. 

 Towards the end of Autumn the brown bandings on 

 the abdomen have a tendency to increase in breadth 

 and so they make the insect darker in tint. 



