Identification file

Semiaphis dauci (Fabricius, 1775)

1.3-1.6 mm

Apterous: small aphid, blue-green to slightly pruinose; head, legs, cornicles and cauda dark green to brownish
Forehead flat
Antennae with length equal to half the body
Abdomen without pigmentation
Cornicles dark, short, equal to half length of cauda, curved inwards
Cauda dark, linguate

Alate: small blue-green aphid
Forehead flat
Antennae same length as body (1)
Abdomen light-coloured with presence of light marginal sclerites (2) and a stripe on each of segments VII and VIII (3)
Cornicles dark, short, equal to half length of cauda, curved outwards (4)
Cauda dark, linguate (5)

Species file