PTEROMALIDAE OF N.W. EUROPE 599 



Type material. Holotype $ [originally described in error as a male], Czecho- 

 slovakia, Hradec Kralove\ 25.viii.1955 {Boucek), in Narodni Museum, Prague 

 (Cat. no. 3028). 



Britain, Sweden, Czechoslovakia, Moldavian S.S.R. 



Biology. I have reared two specimens of corynocera, together with Spilomena 

 troglodytes (v.d.L.), from the decayed branch of an old oak (Quercus robur L.) found 

 at East Wretham, Norfolk ; the parasites, which emerged in late July, 1963, may 

 have been attacking the Spilomena. Imagines July-Aug. 



The original specimens of corynocera were described as male. Boucek (1961 : 79) 

 pointed out that this was an error and that they were really females. The reason 

 for this mistake was that the ovipositor of female corynocera is very fine and concealed 

 by the hypopygium ; whilst the gaster ventrally is unusually flat, more like that of 

 some male Pteromalidae. 



EULONCHETRON Graham stat. n. 



Etroxys sgen. Holcaeus Thomson 1878 : 88, 106 [ex parte]. 

 Lonchetron Graham, 1956a : 80, ex parte. 

 Lonchetron Graham ; Askew, 1962 : 1—3. 



Lonchetron sgen. Eulonchetron Graham, 1966a : 290-291. Type-species : Etroxys {Holcaeus) 

 torymoides Thomson, 1878, by original designation. 



Key to European Species 



(Females) 



1 Gaster extremely elongate, including the ovipositor sheaths 3-3 to 3-7 times as long 

 as the thorax ; distance from base of last tergite to tips of ovipositor sheaths about 

 equal to the combined length of the preceding tergites. Legs rather more slender, 

 especially the femora ....... scalprum (Askew) (p. 600) 



- Gaster (Text-fig. 451) less elongate, including the ovipositor sheaths at most 2-5 times 



as long as the thorax ; distance from base of last tergite to tips of ovipositor sheaths 

 distinctly less than the combined length of the preceding tergites. Legs rather less 

 slender, especially the femora .... torymoides (Thomson) (p. 600) 



Note. Askew (1962 : 3) stated that in female torymoides the antennal scape 

 " extends well above vertex ", while in scalprum it " extends only slightly above 

 vertex ". I cannot detect any real difference between the two species in this 

 respect. The head is sometimes distorted so that the vertex is abnormally raised 

 and the scape in consequence appears to reach less far above the vertex ; this is so 

 in some of the type specimens in Dr. Askew's original series. I have other specimens 

 in which the head is not at all distorted, and in these the scape reaches well above 

 the level of the vertex. 



(Males) 



1 Legs rather more slender, especially the femora ; hind femur, not counting the 



trochantellus, 5-3 to 5-7 times as long as broad . . scalprum (Askew) (p. 600) 



- Legs rather less slender, especially the femora ; hind femur, not counting the trochan- 



tellus, about 4-5 times as long as broad . . . torymoides (Thomson (p. 600) 



