Two new species of the genus Macrosiphoniella Del Guercio, 1911 (Hemiptera, Aphidomorpha: Aphididae) inhabits yarrow in Kazakhstan

Two new aphid species of the nominotypical subgenus genus Macrosiphoniella (Aphidinae) are described from Kazakhstan. Both inhabits yarrow (Achillea millefolium L.). kazakhstanica sp. n. most similar to M. silvestrii Roberti, 1954 but differs latter in number secondary rhinaria apterous and alate viviparous females (5–10 24–26 vs 14–25 48–68), proportion processus terminalis base VI antennal segment (3.7–4.9 2.8–3.6), III (0.82–0.98 1.11–1.36), as well absence dorsal sclerites at setae color all tibiae (brown pale middle species). sarmatica is terraealbae Kadyrbekov, 2000 ratios length 7th (3.15–3.75 2.7–3.1), frontal diameter third (1.6–1.7 2.2–2.6), accessory on ultimate rostral (6 7–8) cauda (10–13 12–19).