A SYNOPSIS OF THE APHIDIDAE 



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11. Eudimentary gonapophyses three. Facets of wax-gland plates almost equal- 

 sized. Wings with simple cubitus. Sensoria of alate forms long oval, not 

 linear Pemphlgina 



Eudimentary gonapophyses none. Wax gland plates always with at least 



one large central facet. Sensoria of alate forms linear. Wings with simple 

 or once-branched cubitus Schizoneurina 



Subfamily CHEEMISINAE 



1. Eudimentary gonapophyses appearing as three short cones. Wax glands 

 almost always present Chennisina 



Eudimentary gonapophyses seemingly lacking. Wax glands mostly absent. 



Phylloxerina 



Group SlPHONOPHORINA 



1. Apterous forms with a few sensoria on the third antenual segment. Antennal 



tubercles usually well formed. Body almost never with lateral tubercles, 

 in any case these are never formed on the seventh abdominal segment .... 2 



Apterous forms without sensoria on the third antennal segment. Antennal 



tubercles often small or absent. Body with lateral tubercles 4 



2. Cornicles almost cylindrical, or rarely somewhat swollen on the side, but then 



the body is covered with capitate hairs 3 



Cornicles distinctly clavate. Body almost bare, never with capitate hairs. 



Rhopalosiphum Koch 

 Type Amphorophora ampullata Buckton. 



3. Body of apterous forms with long capitate hairs. First antennal joint 



drawn out, somewhat tooth-shaped on the inner side Myzus Passerini 



Type Aphis ribis Linn. 



Body of apterous forms bare or without capitate hairs. First antennal joint 



never drawn out, tooth-like Macrosiphum Passerini 



Type Aphis millifolii Fabr. 



4. Body of apterous forms with capitate hairs. First antennal joint more or 



less toothed on inner side Capitophorus n.gn. 



Type Phorodon carduinum Walker. 



Body of apterous forms without capitate hairs. First anteunal joint not 



toothed 5 



5. Body with many long delicate hairs. Cornicles short, somewhat swollen. 



Cladobius (Koch.) Pass. 

 Type Aphis populea Kalt. 



Body bare or almost so 6 



6. Cornicles almost as long or longer than cauda 7 



Cornicles much shorter than cauda 16 



7. Cornicles always distinctly clavate Siphocoryne Pass. 



Type Aphis avenae Fabr. 



Cornicles cylindrical or conical 8 



8. Antennal tubercles well formed, very distinctly toothed on the inner side. 



Tubercles on the side of the body always absent 9 



Antennal tubercles mostly small or lacking, never distinctly toothed. Body 



often with lateral tubercles 10 



9. Antennal tubercles very strongly toothed, the first joint being distinctly 



toothed on the inner side Phorodon Pass. 



Type Aphis humuli Schr. 



Antennal tubercles only slightly toothed, first antennal joint being rounded 



or flat on the inner side, never toothed Ovatus n.gn. 



Type Ovatus mespili v. d. G. 



