PTEROMALIDAE OF N.W. EUROPE 777 



Eupteromalus tachinae Gahan 



(Text-figs. 598, 608) 

 Eupteromalus tachinae Gahan, 1917 : 211-212, $. 



Canada, U.S.A. 



Biology. Hosts, the Lepidoptera Cirphis unipuncta (Haw.) (Noctuidae), Ostrinia 

 nubilalis (Hiibn.) (Pyralidae) ; Diptera, Archytas analis (F.) (Tachinidae). 



Eupteromalus viridescens (Walsh) 

 (Text-fig. 611) 



Glyphe viridascens [sic] Walsh, 1861 : 264, 370, ?. 

 Eupteromalus viridescens (Walsh) Gahan, 1921 : 240-241. 



U.S.A. 



Biology. The species has many recorded hosts, mostly Lepidoptera and their 

 Ichneumonid and Braconid parasites. 



GYRINOPHAGUS Ruschka 



Isocyrtus Thomson, 1878 : 131-133, ex parte [nee Walker, 1833]. 



Gyrinophagus Ruschka, 1914 : (2o8)-(209). Type-species : G. luteipes Ruschka, by mono- 



typy. 

 Gyrinophagus Ruschka ; Delucchi, 19556 : 150-153. 

 Gyrinophagus Ruschka ; Graham, 19566 : 246. 

 Gyrinophagus Ruschka ; Peck et al., 1964 : 48, 50. 



This genus is extremely close to Eupteromalus Kurdjumov, as will be seen from 

 the small differences between them that are mentioned in my key to genera. The 

 males differ from those of Eupteromalus in having conspicuously enlarged eyes ; 

 this, however, is a sexual character, and moreover the males of one species of 

 Eupteromalus show a tendency to be rather large in some specimens. Further 

 research may indicate the desirability of uniting these genera. 



Two species are known from Europe ; another, dineutis (Ashmead) occurs in 

 North America. 



Gyrinophagus aper (Walker) 



Pleromalus Aper Walker, 1839 : 234, <$. 



? Urolepis Cychreus Walker, 1850 : 131,0*. 



Isocyrtus marginatus Thomson, 1878 : 132, <$ $. 



Gyrinophagus marginatus (Thomson) Delucchi, 19556 : 1 51-153, o* ?• 



Gyrinophagus aper (Walker) Graham, 19566 : 246. 



Type material. Pteromalus aper Walker. Lectotype designated by Graham 

 (19566 : 247). 



Urolepis cychreus Walker. There are no specimens so named in the BM(NH). 

 In Haliday's collection I found an unnamed male which, although it bears the 



