Chaitophorus tremulae

The apterae of the aphid Chaitophorus tremulae are elongate oval with the dorsum solidly blackish sclerotic, rather densely sculptured with denticular spinules (=small toothlike spines), and very often with a paler line along the mid-dorsum. More information can be found using the link below. Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed. Please state the host species when submitting records. Well wooded areas, where Aspen is present. Oviparae and alate males occur in October. Aspen leaf aphids live in small colonies on undersides of leaves of Aspen ( Populus tremula ) and a few related species of Populus . They have also been found in leaves spun together by other insects, or in leaf-nest galls made by another group of aphids (Pemphiginae). Can be locally common in areas of Britain where the host species occur. https://influentialpoints.com/Gallery/Chaitophorus_tremulae_Aspen_leaf_aphid.htm