12 BRITISH APHIDES. 



different insects, and their involved synonymy must be 

 attributed to the fact that they all feed on Sonchus and 

 Lackica. 



Rhopalosiphum nymph^^, Linn. Plate XLI, figs. 



1—3. 



Aphis 7iymphcecei Linn., Kalt., Walk. 

 UliopalosiflmmnymphcecB, Koch, Pass. 



Apterous viviparous female. 



Incli. Millimeters. 



Size of body 0-070x0-040 l-77xl-01. 



Length of antennfe 0*055 1'39. 



cornicles 0*015 0-38. 



Oval, dark olive-green, rather glaucous. Head 

 broad. Eyes dark brown. Antennae stout, sooty 

 grey. Vertex round. Abdomen carinated and 

 blotched with lighter green towards the sides. Head, 

 cornicles, and legs somewhat sooty grey. Some 

 specimens are less ovate than others. 



Winged viviparous female. 



Dark green. Head and thoracic lobes black ; the 

 latter shining. Eyes dark brown. Abdomen oval, 

 shining brassy-green, and convex. Cornicles pale, 

 vasiform, and dilated at their mouths. Legs yellowish 

 green. Antennae, femora, tarsi, and tibial tips dark 

 olive. Wings rather short, but broad; insertions 

 yellow ; cubitus and stigma warm brown ; veins rather 

 coarse and black. Rostrum long, reaching just beyond 

 the third coxse. Some winged forms are darker 



