PTEROMALIDAE OF N.W. EUROPE 677 



convinced that it is a small and rather slender specimen of amaenus ; in the form 

 of the clypeus and in other respects it agrees with typical examples of that species. 



Pteromalus lebene Walker. One female, accepted as TYPE. It has the clypeus 

 rather deeply emarginate and may be a somewhat aberrant amaenus, though the 

 pronotal collar is rather shorter than in any females which I definitely regard as 

 that species. 



Eutelus lichtensteini Mayr. Type <$, France, Montpellier, May and June, from 

 galls of the Cecidomyiid Dryomyia lichtensteini Lw., in Naturhistorisches Museum, 

 Vienna. This species was placed in synonymy with amaenus (Walker) by von Rosen 

 (1958 : 225). Askew (19616) considered that lichtensteini might represent a distinct 

 species. He stated that the type <$ differed from males of amaenus in having the 

 antennal funicle wholly yellow, and in its relatively shorter pronotal collar. In 

 British males of amaenus the antennal flagellum has its sixth segment at least 

 slightly marked with fuscous, and often wholly of that colour.. I have, however, 

 examined some specimens reared in Italy from Plagiotrochus sp., males of which 

 have a very long pronotal collar and appear to belong to amaenus ; one of these 

 males has the sixth segment of the flagellum fuscous, another has the funicle entirely 

 yellow. The colour of the funicle is therefore not a reliable character for separating 

 males of lichtensteini from those of amaenus. The shorter pronotal collar of male 

 lichtensteini might be a valid distinction, but it will be necessary to re-examine the 

 type male and other material in order to decide whether it is a good species. 



M. amaenus was redescribed by von Rosen (1958). 



Widely distributed in Europe. 



Biology. Reared from various Cynipid galls, chiefly bud-galls (for host-list and 

 detailed biological information see Askew, 19616). M. lichtensteini was reared 

 from galls of Dryomyia lichtensteini Loew (Dipt., Cecidomyiidae) on Quercus ilex L., 

 by Loew and Mayr ; Frediani (1955, Redia 40 : 174) stated that it was an ecto- 

 phagous parasite of the Cecidomyiid. 



Mesopolobus apicalis (Thomson) 



Eutelus apicalis Thomson, 1878 : 74, <J $ [nee Pteromalus apicalis Nees, 1834]. 

 Eutelus thomsonii Dalla Torre, 1898 : 93 [nom. n.] 

 Mesopolobus apicalis (Thomson) v. Rosen, 1958 : 231, £ $. 

 Mesopolobus apicalis (Thomson) ; v. Rosen, 1959 : 131-132. 

 Mesopolobus apicalis (Thomson) ; v. Rosen, 1960a : 22. 



Type material. 4 <J and 1 $ stand under the name apicalis in Thomson's collection, 

 but only one male and the female agree with the description ; the male was selected 

 as lectotype by me and validated by von Rosen (1958 : 231), who also redescribed 

 the species. 



Sweden. 



Biology. Unknown. 



