Insects of Britain and Ireland: the families of Hemiptera
~ Phylloxeridae. Chermesidae.
Salient features of adults. Terrestrial.
Phytophagous (confined to conifers, forming galls). Small (?); fliers and non-fliers. Head plus thorax of apterae greater in volume than the abdomen. Rostrum ostensibly originating between the front legs; not separated from the prosternum by a gula. Antennae longer than the head, readily visible from above; 3 segmented. Antennae of apterae 3 segmented. Antennae non-aristate. Fore-wings well developed, or vestigial or absent; in the resting insect sloping roof-like over the abdomen; when macropterous, more or less uniform in texture; when present, without costal fracture and cuneus; without a clavus; with three oblique veins. Tarsi 2 segmented; two-clawed. The abdomen without secretory cornicles.
Fore- and hind-wings when present clear and of similar texture, but the fore-wings larger; all the fore-wing longitudinal veins originating from a single straight one close to the front edge. Apterous females covered with flocculent wax.
Taxonomy. Suborder Homoptera. Sternorrhyncha. Adelgoidea.
British representation. 10 species in Britain; genera 2. Adelges, Pineus.
To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the families of Hemiptera. Version: 16th May 2016. delta-intkey.com’.