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1

On roots, large bulky aphid, whitish and elongate. Apterous with antennae noticeably equal to half the body and legs very long (particularly hind-leg tarsi  ), cornicles absent or reduced to a pore; alate with broad pigmented stripes on abdomen
Trama spp see also Trama (Neotrama) caudata

Aphid on aerial parts

——> 2

2

Apterous yellowish green glossy, cornicles short, conical, cauda short; colony with high-density population hidden in severely crinkled young leaves;  alate with dark dorsal patch, cornicles short and conical, cauda short
Brachycaudus helichrysi

Larger species with cornicles medium length to long

——> 3

3

Apterous with cornicles slightly swollen, green to yellowish with pinkish individuals within the colony, which are the future alates (nymphs), cornicles medium-length, slightly swollen on inner side and darkened at tip;  alate with dorsal patch jagged and perforated, with contour uneven, cornicles uniformly pigmented and slightly swollen, cauda pigmented and digitate

Myzus persicae

Large sized species, cornicles long and cylindrical, alate without pigmentation or at most with pigmented stripes

——> 4

4

Apterous green or pink, elongate, large-sized, antennae same length as body and slightly pigmented, cornicles long, cylindrical and darkening towards the tip, cauda long and light-coloured;  alate without abdominal pigmentation, antennae and cornicles darkening towards the tip, cauda long and light-coloured
Macrosiphum euphorbiae

Apterous green to yellowish green, glossy, piriform, antennae long, dark green spots at base of cornicles, cornicles light-coloured and straight with an apical flange darker at tip, cauda digitate; alate with stripes more or less dark on abdomen 
Aulacorthum solani

1

Aphid on roots, devoid of cornicles or bearing cornicles reduced to a pore, antennae with processus terminalis very short

——> 2

Aphid on aerial parts, with cornicles

——> 3 

2

Apterous jgreenish to greyish yellow, producing a waxy secretion in the form of fine woolly filaments which finally cover the whole insect, antennae very short, legs short and squat; alate greenish to greyish yellow, producing a waxy secretion in the form of fine woolly filaments which finally cover the whole insect, antennae very short, legs short and squat; 
Pemphigus bursarius

Apterous whitish, large-sized, antennae noticeably equal to half the body, legs very long (especially the tarsi on hind-legs), cornicles absent or reduced to a pore;  alate with broad pigmented stripes on abdomen
Trama spp see also Trama (Neotrama) caudata

3

Cornicles swollen, alate with a dorsal patch on abdomen 

——> 4

Corniculs cylindrical, alate devoid of pigmentation or with pigmented stripes at the most 

——> 5

4

Apterous light green to opaque green, cornicles strongly bulging asymmetrically, antennae pale, darkened at segmental sutures and with terminal segment dark; alate  with a dorsal patch deeply incised and perforated, antennae dark
Hyperomyzus lactucae

Apterous light green to opaque green, cornicles strongly bulging asymmetrically, antennae pale, darkened at segmental sutures and with terminal segment dark; alate with a dorsal patch jagged and perforated
 Myzus persicae

5

Apterous green or pink, large-sized and elongate, antennae same as length of body and slightly pigmented, cornicles long, cylindrical darkening towards tip, cauda long and light-coloured;    alate  without abdominal pigmentation, antennae and cornicles darkening towards the tip, cauda long and light-coloured
Macrosiphum euphorbiae

Apterous green to yellowish green, glossy, piriform, antennae long, spots dark green at base of cornicles, cornicles light-coloured, straight having a dark flange at tip, cauda digitate;  alate with stripes more or less dark on abdomen 
Aulacorthum solani

Apterous yellowish to greenish or sometimes pinkish, always glossy, antennae with a long processus terminalis, abdomen with dorsal stripes weakly pigmented, cornicles long, straight, light-coloured and pigmented at tip, cauda digitate; alate with dorsal stripes pigmented, antennae long, fine and dark, cornicles cylindrical, long and dark, cauda digitate and dark
Nasonovia ribisnigri

1

On the roots, very large aphid whitish and elongate. Apterous with antennae noticeably equal to half the body; legs very long (especially the hind-leg tarsi); cornicles absent  or reduced to a pore;  alate with broad stripes pigmented on abdomen
Trama spp see also Trama (Neotrama) caudata

Aphid on aerial parts , cornicles present

——> 2

2

Apterous and alate green to yellowish; cornicles long and fine; with numerous hairs on head and abdomen; alate with abdominal patch
Capitophorus horni

Aphid with cornicles short to medium-length

——> 3

3

Apterous matt, dark olive green to black, with future alates within the colony showing waxy white stripes; cornicles straight, black; cauda digitate and squat;  alate with a large number of small rhinaria on antennal segment III, some on IV; abdomen with stripes pigmented and contour uneven
Aphis fabae

Apterous green to yellowish

——> 4

4

Apterous glossy yellowish green; cornicles short and conical; cauda short; colony with very dense population hidden in artichoke capitula ; alate with a dark dorsal patch; cornicles short and conical; cauda short 

Brachycaudus helichrysi

Apterous green, rounded, bulging and adults with a broad brown patch, glossy and compact; cornicles 2-times longer than cauda;  alate with a broad dark patch on dorsal side and lateral spots on segments on ventral side; cornicles straight, medium-sized and black
Brachycaudus cardui