POLSKIE PISMO ENTOMOLOGICZNE P O L I S H J O U R N A L O F E N T O M O L O G Y VOL. 75: 227–231 Bydgoszcz 30 June 2006 Psylla kotejai sp. n., a new species from Yakutia (Hemiptera: Psylloidea) JOWITA DROHOJOWSKA & ISĘDZIMIR MACIEJ KLIMASZEWSKII Department of Zoology, University of Silesia, Bankowa 9, 40-007 Katowice, Poland; e-mail: jdrohoj@us.edu.pl ABSTRACT. A new species – Psylla kotejai is described from Yakutia. The pictures of head, forewing, male and female genitalia are presented. KEY WORDS: entomology, taxonomy, new species, Psylla, Psylloidea, Hemiptera, Yakutia. INTRODUCTION The genus Psylla GEOFFROY, 1762 is a very large taxon having a worldwide distribution on a wide variety of host plants (HODKINSON & WHITE 1979). Species of this genus are distributed in almost all regions: from arctic and subarctic part of Northeast Russia, Chukotka (HODKINSON & MACLEAN 1980) and Alaska (HODKINSON et al. 1979), through Holoarctic Region (KLIMASZEWSKI 1973, GEGEČKORI & LOGINOVA 1990) and Oriental Region (HODKINSON 1986), to the hot zones of South America (TUTHILL 1959). Psyllids collected in Yakutia by SUBNIKOVA were provisionally identified by KLIMASZEWSKI as Psylla betulaenanae OSS. A more detailed analysis has shown that 9 specimens display a set of characters which are markedly different from the other jumping plant lice described as Psylla betulaenanae. Moreover, these characters have not been found in any other known psyllid species. They represent a new species which description is given below. TAXONOMY Order Hemiptera LINNAEUS, 1758 Suborder Sternorrhnycha DUMÉRIL, 1806