Abstract
Two new species of the genus Klimaszewskia were described from aphid collections made in 2010–2011 in the “Katon-Karagaiskii” State National Natural Park (the Kazakhstan part of the Altai Mountains). Klimaszewskia altaica Kadyrbekov, sp. n. inhabiting Nepeta sibirica and K. katonica Kadyrbekov, sp. n. inhabiting Dracocephalum grandiflorum differ from the other known species of this genus in a smaller number of hairs on the ultimate rostral segment and on the 2nd segment of the hind tarsus and also in the presence of indistinct, strongly flattened marginal protuberances. They differ in the length ratio between the processus terminalis and the base of the 6th antennal segment (3.6–4.6 in the former, and 4.2–5.2 in the latter species), the siphunculi and the body (0.17–0.24 versus 0.25–0.27), and the cauda and the 2nd segment of the hind tarsus (1.7–2.2 and 2.25–2.35), as well as in the length of hairs on the frons, antennae, and tergites, in the number of hairs on tergite VIII (8–10 and 2–3), and in the number of secondary rhinaria on the 3rd antennal segment (3–12 compared to 0–2). The holotypes and some paratypes of the new species are deposited in the collection of the Institute of Zoology (Almaty, Kazakhstan). Some part of the paratypes is kept in the Zoological Institute of the Russian Academy of Sciences (St. Petersburg, Russia).