Metriocnemus van der Wulp : Seven new species, revision of species, and new records (Diptera : Chironomidae)

Abstract

The congenerity of Arctomyia Lundstrôm, 1915, with Metriocnemus van der Wulp, 1874, is confirmed. Types of Arc- tomyia sibirica Lundstrôm ; Chironomus picipes Meigen, 1818 : Metriocnemus longipalpus Sinharay et Chaudhuri, 1978 ; and Apometriocnemus beringiensis Cranston et Oliver, 1988 ; are examined. Metriocnemus sibiricus is close to M. longipennis (Holmgren), M. picipes is separate from M. atriclava Kieffer, M. longipalpus is a junior synonym of M. picipes,a.nd M. beringiensis is close to M. fuscipes (Meigen). M. obscuripes (Holm- gren) is a junior homonym and replaced by M. eurynotus (Holmgren). Metriocnemus wangi sp. n., M. acutus sp. n., M. dentipalpus sp. n., M. calvescens sp. n., M. sibiricus, M. caudigus sp. n., M. intergerivus sp. n., M. aculeatus Chaudhuri et Bhattacharyay, M. unilinearis Chaudhuri et Bhattacharyay, M. exilacies sp. n., M. beringiensis and M. picipes are described as male imagines. The females of M. longipennis, M sibiricus, M. intergerivus, M. picipes and M. atriclava are described. Keys to both sexes are presented. New records from Norway and China are given for M. eurynotus, M. brusti Sasther, M. ursinus (Holmgren), M. fuscipes, M. aculeatus, M. unilinearis, M. beringiensis, and M. picipes.