APHIS SAMBUCARIA. 95 



tibial points. Wings large ; cubitus, stigma, and veins 

 yellowish green. 



This Aphis, when young, changes its colour, chame- 

 leon-like, almost every five minutes, so much so as to 

 render it difficult to copy it with the brush. Great 

 numbers were taken on the feverfew, Pyretlwimn ino~ 

 dorum^ towards the end of July during thundery 

 weather. At that time the pupge were fast splitting 

 their skins and giving birth to the bright green 

 images. This insect also infests Epilobium onontanum 

 and E. parvifl-orum. Specimens were obligingly sent 

 to me from Pembroke by Mr. Charles Barrett. 



Aphis sambucaria. Pass. Plate LXVIII, figs. 6, 7. 



Apterous viviparous female. 



Pale ochreous. Antennae equal in length to one 

 half of the body. Abdomen punctured, mucronate at 

 the margin. Cornicles black, not much longer than 

 thick. Cauda black, very small ; posterior anal ring 

 with two black dots ; two little horns behind the 

 nectaries. Rostrum reaches to the middle coxse. 



Winged viviparous female. 



Antennge shorter than the body. Head, prothorax, 

 and thorax black. Abdomen green, with thin fuscous 

 transverse dorsal lines ; sometimes these are wanting. 

 Cornicles black. Cauda small, pilose. Wing glabrous. 

 Rostrum reaches to the third coxae. 



As I have not met with these two forms of this 

 insect, I have in the above used Passerini's descrip- 

 tions. 



Winged male. 



Inch. Millimetres. 



Expanse of wings 0*240 6'09. 



Size of body 0-065x0-020 1-64X0-50. 



Length of antennas 0-070 1'77. 



cornicles 010 0-25. 



