Large walnut aphid

Panaphis juglandis

Panaphis juglandis is a species of aphids belonging to the Aphididae family. They live on the upper sides of leaves of walnut (Juglans regia), in rows along the veins, and are often ant-attended. Sexual forms occur in September-October.
Panaphis juglandis - Large walnut aphid 4th instar alatiform nymph on the upperside of a common walnut leaf (Juglans regia) attended by black garden ants (Lasius niger) Animal,Animalia,Aphididae,Aphidomorpha,Arthropoda,Bulgaria,Europe,Geotagged,Insect,Insecta,Large walnut aphid,Panaphis juglandis,Sofia,South park,Summer,Wildlife

Distribution

It occurs in Europe, and parts of central Asia, Pakistan and was introduced into the western USA.

References:

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https://influentialpoints.com/Gallery/Aphids_on_walnut_Juglans.htm
Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderHemiptera
FamilyAphididae
GenusPanaphis
SpeciesPanaphis juglandis
Photographed in
Bulgaria