80 BRITISH APHIDES. 



colour ; sometimes, however, it is wliolly dark green. 

 Thoracic lobes and wing-cases paler. 



Winged viviparous female. 



Incli. Millimetres. 



Expanse of wings 0'200 5-080. 



Size of body 0-070X0-030 l'77x076. 



Lene'th of antennae 0*060 1"52. 



'■&" 



cornicles O'OIO 0'25. 



Black both above and below. Abdomen velvet-like 

 and of a greener shade. Head broad. Eyes black. 

 Head and thorax together about equal in length to the 

 abdomen. Antenna3, legs, and cornicles blackish ; 

 tibiae obscure ochreous. Abdomen furnished with 

 several spines on each side. Wings rather short, 

 with strong cubitus and deeply marked black veins. 

 Cauda black and pilose. To the uaked eye this species 

 often appears to be wholly black. The greenish shades, 

 however, become e^ddent under a lense if assisted by a 

 good light. 



Often very numerous during June and July, on the 

 ragwort, Senecio jacohcea. Aphis carclui also sometimes 

 mixes with the companies. This last insect may be 

 distinguished from the other by its glossy integument. 



Koch describes two different insects under the above 

 name, one only of which agrees with Kaltenbach's 

 description. 



Aphis ACETOSiE, BucJdon. Plate LXII, figs. 5 — 7. 

 A. onolluginis, Koch ? 



Apterous viviparous female. 



