A SYNOPSIS OF THE APHIDIDAE 



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Group CALLIPTERINA 



1. Antennae six-jointed. Cornicles merely pores. Body always with wax 



glands Phyllaphis Koch 



Type Phyllaphis fagi (Linn.). 



Antennae seven-jointed, the terminal process at least one-half as long as the 



preceding joint. Cornicles always distinctly projecting. Body almost 

 always without wax glands, these always of similar shape 2 



2. Seventh antennal joint distinctly longer than sixth 3 



Seventh antennal joint only as long as, or shorter than sixth 6 



3. Cornicles but slightly projecting. Antennae curved as in beetles. 



Bradyaphis Mord. 

 Type Bradyaphis antennata (Kalt.). 



Cornicles distinctly prominent. Antennae straight 4 



4. Anal plate only slightly emarginate, never bilobed. Body with tolerably stiff 



hairs, these are never capitate. Apterous forms always with sensoria on 



third antennal joint Callipterinella n.gn. 



Type Callipterus betularius Kalt. 



Anal plate distinctly bilobed. Body bare or with capitate hairs 5 



5. Apterous forms without sensoria on third antennal joint. The body always 



with capitate hairs Callipterus Koch 



Type Callipterus coryli (Goetze). 



Apterous forms with a few sensoria on third antennal joint. Body with dis- 



tinct tubercles Tuberculatus Mord. 



Type Tuberculatus "betulicolus (Kalt.). 



6. Anal plate distinctly bilobed 3 



Anal plate always simple 7 



7. Cauda wart-like, distinctly separated from base. Apterous forms without 



sensoria on third antennal joint Callipteroides Mord. 



Type Callipterus betulae Koch. 



Cauda scarcely visible. Sensoria present on third antennal joint of apterous 



forms Symydobius Mord. 



Type Symydobius oblongus (Hey den). 



8. Seventh antennal joint nearly as long as the sixth. Wings Avith only very 



small black spots at the tip of the veins Subcallipterus Mord. 



Type Callipterus alni (Fabr.). 



Seventh antennal joint nearly half as long as sixth. Wings black spotted. 



Pterocallis Pass. 

 Type Pterocallis tiliae (Linn.). 



Group CHAITOPHORINA 



1. Body with long delicate hairs. Antennae seven-jointed. Cornicles well de- 



veloped 2 



Body with short thorn-like hairs. Antennae six-jointed, the terminal process 



always distinctly longer than the preceding joint. Cornicles only slightly 



projecting Sipha Passerini 



Type Sipha glyceriae (Kalt.). 



2. Tarsi with two " Haftlappchen " [i.e., the empodial hair is spatula-like]. 



Chaitophorinella n.gn. 

 Type Chaitophorus testudinatus (Thornton). 



Tarsi without "Haftlappchen" [i.e. the empodial hair is bristle-like]. 



Chaitophorus Koch 

 Type Chaitophorus leucomelas Koch. 



