pteromalidae of n.w. europe 193 



The GENICULATUM-Grovp 



(= ISOPLATA Forster) 



Seladerma geniculatum (Zetterstedt) comb. n. 



Pteromalus parvulus Zetterstedt, 1838 : 423, $, syn. n. 



Entedon geniculatus Zetterstedt, 1838 : " 430 " [rede 428] q*. 



Pteromalus celer Forster, 1841 : 14, ^. 



Pteromalus platynotus Forster, 1841 : 27, q", syn. n. 



Isoplata geniculata Forster, 1856 : 62, o* ?• 



Ormocerus vernalis Thomson, 1876a : 242, <J $ [nee Walker, 1834]. 



Isoplata geniculata Forster ; Delucchi, 1955 : 6, 63-66, o* $. 



Isoplata geniculata (Zetterstedt) Boucek, 19656 : 549. 



Type material. Pteromalus parvulus Zetterstedt. One female, LECTOTYPE, 

 labelled in Zetterstedt's handwriting " P. parvulus. $. Bossekop ". 



Entedon geniculatus Zetterstedt. One male. LECTOTYPE, labelled in Zetter- 

 stedt's handwriting " E. geni=culatus <$ Bossekop ". Transferred to Isoplata by 

 Boucek (1965 : 549). 



Pteromalus celer Forster. Syntypes, 2 $ in Forster coll., Vienna [not seen] ; a 

 lectotype has been selected by Delucchi (1955a : 172). The species was synonymized 

 with geniculata (Zetterstedt) by Boucek (19656 : 549). 



Pteromalus platynotus Forster. Type male in Naturhistorisches Museum, Vienna, 

 a damaged specimen lacking head ; it was recognized as being identical with Isoplata 

 geniculata Forster by Delucchi (1955a : 172). 



Isoplata geniculata Forster. I have examined syntypes from Forster's collection 

 but have not selected a lectotype. 



The specimens in Thomson's collection " Ormocerus vernalis " are actually 

 Seladerma geniculatum (Zett.). The species recorded from Iceland by Bakkendorf 

 (1955 : 139, figs, 1, 15, 28) as Ormocerus vernalis, is also certainly geniculatum. 



By a curious coincidence Zetterstedt and Forster both chose the name geniculatum 

 for this species. The name Pteromalus parvulus Zetterstedt actually has page 

 priority over Entedon geniculatus but I am adopting the latter so that the species 

 name may be unchanged. 



Isoplata geniculata Girault (1913 : 312) was proposed by him because he thought 

 Forster's species and generic names were nomina nuda. Girault's genus is said to 

 have 4 teeth in both mandibles and must be different from Isoplata Forster. 



Britain, Ireland, Sweden, Iceland, Germany. 



Biology. I reared a male of geniculatum on 5^.1948, from a puparium of Phyto- 

 myza varipes Macq. in seeds of Rhinanthus collected the previous year on the North 

 Bull, Dublin (E. O'Mahony). On 8.VU.1955 I swept numerous males and females 

 on a coastal sward where Rhinanthus minor Ehrh. was abundant, at Marazion, 

 Cornwall. Imagines June-August. 



Seladerma sp. indet. A 

 Scotland : Perthshire, Lawers, 1$, 12.vii.1952 (Graham). 



