PTEROMALIDAE OF N.W. EUROPE 771 



carina sometimes sharp except just at the sides) its surface usually extensively shiny. Length 

 1-2-1-75 mm. 

 o*. Unknown. 



Holotype $. Sweden : Skane, Falsterbo, 27.vii.195g, swept from sand-dune 

 vegetation (Graham), in Graham collection. 



Paratypes. Same data as holotype, 5 £ ; England : Berkshire, Wytham, 

 1 $, 12.vii.1956, swept in a meadow between Wytham Wood and the River Thames 

 (Graham), all in Graham collection. 



Eupteromalus hemipterus (Walker) 

 (Text-figs. 628, 641) 



Pteromalns apicalis Walker, 1836 : 196, 9 [ nec Nees, 1834]. 



Pteromalns hemipterus Walker, 1836 : 196—197, q* $. 



Pteromalus pedestris Forster, 1861 : 36, $ $. 



Pteromalus nidulans (Forster MS.) Thomson, 1878 : 155-156, o* $ [ex parte]. 



Eupteromalus hemipterus (Walker) Kurdjumov, 1913 : 13. 



Eupteromalus nidulans (Thomson) Kurdjumov, 1913 : 13. 



Eupteromalus pedestris (Forster) Kurdjumov, 1913 : 13. 



Eupteromalus hemipterus (Walker) ; Hardh, 1950 : 92-93. 



Eupteromalus apicalis (Walker) Graham, 19566 : 255. 



Eupteromalus apicalis (Walker) ; Delucchi, 1958a : 56. 



Type material. Pteromalus apicalis Walker and P. hemipterus Walker. Lecto- 

 types designated by Graham (1956& : 255). 



Pteromalus pedestris Forster. Syntypes, 6 specimens in Forster collection, 

 Naturhistorisches Museum, Vienna ; lectotype designated by Delucchi (1958a : 56), 

 who synonymized the species with apicalis (Walker). 



Pteromalus nidulans Thomson. Syntypes, 22 specimens representing at least 3 

 different species (including 5 <$ of Meraporus !). None of the specimens agrees 

 absolutely perfectly with the description. Most of the females, and some of the 

 males, however, are the same as hemipterus (Walker), which Thomson (1878 : 155) 

 cited as a probable synonym of nidulans. Thomson (ibid.) included the brachy- 

 pterous form in his concept of the range of variation of nidulans, so it is clear that the 

 species here called hemipterus was uppermost in his mind when he described nidulans. 

 Most of the female syntypes have damaged antennae, but one (on the last pin in the 

 series) is a perfect specimen of the brachypterous form ; I designate this specimen, 

 which is labelled " $ " and " Lund ", as LECTOTYPE. It is particularly important 

 to have a perfect specimen as lectotype because nidulans is the type-species of the 

 genus. 



The species identified as nidulans Thomson by Masi (1908 : 122-123, figs. 25, 26) 

 cannot have been the same as the true nidulans. Masi's figure 25 of the female 

 shows the marginal vein as only slightly longer than the stigmal vein, and the eyes 

 relatively small. I have not seen his specimens and so cannot be sure whether his 

 nidulans is identical with any of the other species mentioned in the present work. 

 The species identified by several American authors as nidulans was introduced into 



