166 
BRITISH APHIDES. 
The toothed frontal tubercle is most developed in 
the apterous viviparous females. 
Phorodon humulIj Schranh. Plate XXX. 
Aj}liis liumuli^ Schrank., Kalt., Walk., Koch. 
„ jpTiini, Scop. 
„ humulifex, Amyott. 
Phorodon Immuli^ Passerini. 
Apterous viviparous female. 
Indies. 
Size of body 0*055x0*025 
Length of antenme 0*040 
,, cornicles 0*015 
Millimetres. 
1*39X0‘62. 
1 * 01 . 
0*38. 
Small, oval, pale green. Eyes red. Frontal tuber- 
cles dentate. First joint of the antennae gibbous and 
porrected. Body sometimes shining, and sufficiently 
transparent to allow the tracheae to appear like silver 
threads, which form a kind of segmentation on the 
dorsum. From one to three green stripes pass down 
the back. Cornicles straight and cylindrical. Tail 
and legs rather short. 
Pupa. 
Head, prothorax, and thorax broad and squarish. 
Two red spots on the vertex mark the seats of the 
future ocelli. Abdomen pointed at the apex. Whole 
insect green and slightly pilose. 
Winged viviparous female. 
Indies. Millimetres. 
Expanse of wings 0*260 6*60. 
Size of body 0*070x0*025 1*77x0*62. 
Length of antenna 0*080 2*02. 
„ cornicles 0*017 0*40. 
