PTEROMALIDAE OF N.W. EUROPE 611 



Stenomalina muscarum (Linnaeus) auctt. 

 (Text-fig. 474) 



Pteromaius muscarum (Linnaeus) sensu Walker, 1835a : 184, $ [nee Ichneumon muscarum Lin- 

 naeus, 1758 : 567]. 

 Eutelus gracilis Walker, 1834 : 365, $. 

 Pteromaius aurifer Walker, 1835 : 487, $. 

 Pteromaius Thessalus Walker, 1839 : 268, <$. 



Etroxys (Stenomalus) muscarum (Linnaeus) Thomson, 1878 : 91, $ $. 

 Stenomalina muscarum (Linnaeus) ; Herrstrom, 1964 : 447, 448. 

 Stenomalina muscarum (Linnaeus) ; v. Rosen, 1964 : 453-454. 

 Stenomalina muscarum (Linnaeus) auctt. ; Graham & Claridge, 1965 : 270, 271, 283-285, <J <j>. 



Type material. For synonymy and designation of lectotypes, see Graham & 

 Claridge (1965 : 283-284). In that paper it was shown (pp. 283-284) that the 

 present species could not have been the Ichneumon muscarum of Linnaeus ; but 

 since the name has been consistently used in that sense, it seems desirable to maintain 

 the usage. 



Widely distributed in Europe and very common. 



Biology. Reared in Britain from puparium of Melanagromyza symphyti Griff, 

 on Symphytum officinale (L.) and from Phytomyza ramosa Hd. (see Graham & 

 Claridge, 1965 : 284-285). Fulmek (1962 : 35, 42, 64) records the following hosts : 

 Agromyza apfelbecki Strobl in Italy and Spain, Chlorops pumilionis (Bjerk.) in 

 Poland, N apomyza lateralis (Fin.) in Belgium, Phytomyza cineracea Hend. in Denmark 

 and Tylomyza pinguis (Fin.) in Belgium. Herrstrom, and von Rosen (1964), in 

 their studies on the parasites associated with Rape (Raps) in Sweden, mentioned 

 its having been obtained in rearings ; von Rosen (1964 : 454) suggested that it may 

 have been attacking Phytomyza rufipes Mg. Imagines of both sexes may be found 

 from June until October ; females overwinter in buildings and amongst the foliage 

 of evergreens. Before and after hibernation, swarms of females sometimes appear 

 in old houses, particularly on windows and ceilings (see Graham & Claridge, 1965 : 

 285). The species is sometimes transported on boats ; for example, on 29. ix. 1956, 

 I collected females from the windows of a deckhouse on a ferry boat going from the 

 Isle of Wight to Lymington in Hampshire. 



CHLOROCYTUS Graham 



Chlorocytus Graham, 1956 : 92. Type-species : Pteromaius pulchripes Walker, 1836, by original 



designation. 

 Chlorocytus Graham ; Peck et al., 1964 : 58. 

 Chlorocytus Graham ; Graham & Claridge, 1965 : 285-308. 



The genus has been revised by Graham & Claridge (1965) ; for descriptions and 

 detailed biological information see that paper. These authors remarked (1965 : 264) 

 on the fact that no species belonging to the group of genera to which Chlorocytus 

 belongs had been recorded from the Nearctic region. Since then Dr. George 

 Wallace has sent me some species of the genus from the U.S.A., so I feel sure it will 

 eventually be discovered also in Canada. 



