A new species of Xerobion Nevsky, 1928 (Hemiptera: Aphidoidea, Aphididae) from Kazakhstan, with a key to apterous viviparous females of the genus

A new species Xerobion ulytavicum Kadyrbekov sp. n. from host plant Galatella biflora is described Karaganda region (Kazakhstan). New differs the most similar X. caspicae Bozhko, 1963 by shape of ultimate rostral segment, ratio length siphunculi and cauda (0.4–0.75 vs 0.7–1.0, respectively), proportion frontal setae to diameter third antennal segment at base (1.0–1.2 0.7–1.0) a hair on trochanter hind legs trochanter-femoral suture (0.5–0.6 0.25), as well belonging another genus. key apterous viviparous females all known genus given.