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

The congenerity of Arctomyia Lundström, 1915, with Metriocnemus van der Wulp, 1874, is confirmed. Types of Arctomyia sibirica Lundström ; 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, and M. beringiensis is close to M. fuscipes (Meigen). M. obscuripes (Holmgren) 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 Sæther, M. ursinus (Holmgren), M. fuscipes, M. aculeatus, M. unilinearis, M. beringiensis, and M. picipes