I give here the characters of one species as I find them in the works 
of European entomologists. I select a species which will probably be 
found here as it is found on the cultivated parsnip. 
Sippocoryne Pastinacjs. Linn. (The Parsnip plant-louse). 
Syn. Aphis caprece. Fabi. 
Siphocoryne caprece. Pass. 
Aphis pastinaccz. Linn. 
Rhopalosiphum pastinacce. Koch. 
I have not detected this species, but there can be but little doubt 
of its existence in this country on the cultivated plants on which it 
is found. 
The color is a delicate greenish yellow. 
Winged viviparous female.— Antennae about as long as the body; 
third joint longest. Honey-tubes rather large, and very distinctly en¬ 
larged in the middle portion near the tips; extending beyond the tip 
of the abdomen. Tail distinct but small and not more than one-thiid 
or one-fourth the length of the honey-tubes. Head, antennae and 
thoracic lobes dark brown or black; remainder,, t>f the body, the legs 
and honey-tubes pale pea-green or greenish-yellow. About or slightly 
above medium size. 
Wingless female'.— Pale green or yellowish throughout; a rather broad 
submarginal greenish stripe along each side. 
Koch and Passerini consider caprece as distinct. 
The chief difference appears to be in the color, which is more um- 
forrnlv green. The honey-tubes are also a trifle shortei, &ud the en 
largement is thrown nearer to the tip. There may be some difference 
in the joints of the antennas. 
Infests the undersides of the leaves, and the tender stems of the 
common parsnip ( Pastinacea saliva ). 
Genus Aphis. Linn. 
This genus in its restricted sense includes only those species which 
have the antennae of moderate length, usually shorter than the body 
and not placed on tubercles; similar in respective length of the joints, 
to Siphonophora, third and seventh longer than the others. I he 
honey-tubes cylindrical, of moderate length, seldom reaching the tip 
of the abdomen, and always (or at least with tew exceptions) longer 
than they are thick* body not hairy; legs of moderate length. \\ ings 
