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Last (6th) segment of antennae with the apical narrow section (processus terminalis or "Pt") shorter than the thicker basal section (base of segment 6);
siphunculi absent; living underground on roots

Poplar gall aphid
Pemphigus bursarius (L.)
Processus terminalis (Pt) much longer than the base of antennal segment 6; siphunculi present as tubular structures on the abdomen; living on above-ground parts of lettuce plant

 
 
 

Document 5371, submitted 11 November 2005
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© NSW Agriculture, 2005

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