A REVISION OF THE HOLARCTIC SPECIES OF SERROMYIA MEIGEN (DIPTERA, CERATOPOGONIDAE)

Abstract. This revision recognizes sixteen extant species of Serromyia in the Holarctic Region including seven described as new: S.bicolor Borkent, S.borealis Borkent, S.nudicolis Borkent, S.pacifica Remm, S.sierrensis Borkent, S.tecta Borkent and S.vockerothi Borkent. In addition, eleven new synonyms are indicated. Keys and descriptions of the male and female adults, and their known distributions, are given for all species. The egg and first instar larva of Serromyia nudicolis Borkent n.sp., the pupa of S.atra (Meigen) and the fourth instar larvae of an unidentified Serromyia are also described. All available fossil specimens were examined, some redescribed, and two named as new: S.ryszardi Borkent and S.sinuosa Borkent. New combinations are S.alpheus (Heyden), Atrichopogon trichopus (Thomson) and Monohelea scirpi (Kieffer). Limited phylogenetic interpretation indicates that all extent Holarctic species, with the exception of S.mangrovi Delecolle and Braverman, form a monophyletic group. Six Baltic amber species are not members of this clade. Metacanthohelea is recognized as the sister group of the genus Serromyia. Copyright © 1990, Wiley Blackwell. All rights reserved