Fig. 2   Dorsal facies of apterous viviparae representative of two large genera of Macrosiphini, to show additional morphological features referred to in the keys. (a) A Dysaphis species (D. radicola), showing a typical distribution of marginal and spinal tubercles (MTu and STu). Arrows indicate a pair of pleural hairs on the posterior margin of the pronotum that are characteristic of the devecta species group. (b) A member of Uroleucon (subgenus Uromelan), showing features typical of this and related genera.