Species ofTrichomalopsis(Hymenoptera: Pteromalidae) associated with filth flies (Diptera: Muscidae) in North America

Abstract

AbstractFive species ofTrichomalopsisCrawford associated withHaematobia irritans(L.) (horn fly),Musca domesticaL. (house fly),Musca autumnalisDeGeer (face fly), andStomoxys calcitrans(L.) (stable fly) in North America are reviewed. The speciesTrichomalopsis americana(Gahan),Trichomalopsis dubia(Ashmead),Trichomalopsis sarcophagae(Gahan),Trichomalopsis tachinae(Gahan), andTrichomalopsis viridescens(Walsh) are described, keyed, and differentiated from other recognized North American species. Lectotypes are designated forT.dubia,T.sarcophagae, andT.tachinae. Distribution and host associations are recorded for the species.Trichomalopsis americanaandT.viridescensare newly recorded as parasitoids ofM.domestica;T.dubiaandT.sarcophagaeare also newly recorded as parasitoids ofHypoderma lineatum(Villers) (common cattle grub) andHypoderma bovis(L.) (northern cattle grub), respectively. Some previously published host associations and parasitoid identifications are corrected based on examination of voucher specimens. The known biology of each species is reviewed. The presence ofTrichomalopsis albipilosa(Gahan) in North America is considered to be erroneous based on a misidentification ofT.americana.