PTEROMALIDAE OF N.W. EUROPE 327 



Holotype $. England : Middlesex, Southgate, 29. iv. 1965, from foliage of 

 Betula sp. {Graham), in Hope Department, University Museum, Oxford. 



Paratypes. Same data as holotype, 4 $, 5 $ ; Berkshire, Wytham Wood, 1 $, 

 14. v. 1964, swept from foliage of Betula sp. (Graham) ; Oxfordshire, Shirburn Hill, 

 near Lewknor, 1 $, 16. v. i960 (Graham), in Graham collection. 



Biology. Unknown. 



This species is named after Francis Walker, who collected many of his 

 Chalcidoidea at Southgate. It is the first new species to be described from that 

 neighbourhood since his time, some 130 years ago ; the holotype was captured within 

 a mile or so of his former home, Arno's Grove. 



Note. I have not seen the types of the following species of Gastrancistrus, which 

 were described from Switzerland by Forster (1861) ; at least some of them are likely 

 to be valid and may in such case take priority over certain Thomson names : 



Gastrancistrus speculifer Forster, 1961 : 35, <$. Probably belongs to the species- 

 group of compressus Walker. 



G. refulgens Forster, 1961 : 35, $. Probably also belongs to the species-group of 

 compressus. 



G. claviger Forster, 1961 : 35, <$ $. 



G. erythropus Forster, 1861 : 36, $. 



G. subpunctatus Forster, 1961 : 36, <$. Probably belongs to the species-group of 



compressus Walker. 



Notes on some extra-limital species of Gastrancistrus 

 and on species wrongly placed in that genus 



A. Gastrancistrus Polles Walker, 18436 : 186, $ (Chile) is correctly placed in this 

 genus (Type Hym. 5. 660). 



B. The following also belonging to Gastrancistrus according to their respective 

 types, which I have examined : 



Miscogaster Menaetes Walker, 1839a : 20, <$ (Australia) (Type Hym. 5. 662). 



M. Psapho Walker, 1839a : 23, $ (Australia). 

 I found a male of this species, now designated LECTOTYPE, standing in the 

 British collection under the name " Lamprotatus psapho "; it bears a handwritten 

 label " Psapho ". 



Seladerma Epulo Walker, 1839a : 86, $ (Chile) (Type Hym. 5. 797). 



C. The following species were described as Gastrancistrus but do not belong to it : 

 G. Vonones Walker, 1839a : 67, <$ (Brazil) (Type Hym. 5. 663). This belongs to 



the Eulophid genus Chrysocharis ! 



G. Cephalon Walker, 1843 : 30, $ (Chile) (Type Hym. 5. 661). This is a Ptero- 

 malid ; I am unable at present to place it to genus, although it is not a Gastrancistrus. 



G. Hierocles Walker, 1848 : 105, 158, <$ (England, type in British collection) ; 

 this is a male of Coruna clavata Walker (q.v.). 



G. Iriarte Walker, 1848 : 105, 159, £ (England, type in British collection) ; a 

 male of Chrysocharis idyia (Walker) ! 



