PTEROMALIDAE OF N.W. EUROPE 465 



2 (1) Antenna with combined length of pedicellus and flagellum only 1 -3 to 1 -4 times 

 the breadth of the head ; seventh funicular segment quadrate or very 

 slightly transverse ..... crassispina (Thomson) (p. 466) 

 Antenna (Text-fig. 343) with combined length of pedicellus and flagellum 1 -6 

 to 1 >7 times the breadth of the head ; seventh funicular segment at least 

 very slightly longer than broad, up to 1 -6 times as long as broad 



obscura Walker (p. 465) 



Psilocera atra (Walker) 



Metopon atrum Walker, 1834 : 303, $. 



Metopon atrum Walker ; Haliday, 1 841-1842 : v, pi. B, fig. 3, $. 



Metopon punctifrons Thomson, 1878 : 168, $ $, syn. n. 



Type material. Metopon atrum Walker. One female, designated LECTOTYPE 

 (probably holotype), bearing a Waterhouse label. 



Metopon punctifrons Thomson. Syntypes, 5 specimens. LECTOTYPE, a male 

 labelled " Bas " [Bastad]. 



Britain, Sweden, Czechoslovakia. 



Biology. Unknown. The species generally occurs in open grassy situations. 

 Imagines May-August. 



Psilocera obscura Walker 



Psilocera obscura Walker, 1833 : 374, <J. 



Psilocera obscura Walker ; Haliday, 1841-1842 : v, pi. D, fig. 3, $. 



Metopon concolor Thomson, 1878 : 168, $ [lectotype], syn. n. 



Type material. Psilocera obscura Walker. In BM(NH) there are no specimens 

 labelled as obscura ; but standing with the series of Prosodes ater Walker (and 

 bearing a Waterhouse label " Prosodes ater ") there is a male Psilocera which fits 

 the description of obscura well and is now designated LECTOTYPE. It could 

 easily have been misplaced and wrongly labelled, especially since in Walker's 

 Monographia (Ent. Mag., 1) the genus Prosodes follows immediately after Psilocera. 

 Other evidence supports the conclusion that my identification of obscura is correct. 

 Thus in Haliday's collection there is a male (No. 641) labelled " Psilocera obscura " 

 and conspecific with the lectotype. In Westwood's collection there is a Walker 

 male labelled " Psilocera obscura " in his handwriting, also conspecific with the 

 lectotype. The specimen in Westwood's collection could well be taken as lectotype 

 but I have chosen the male in BM(NH) in preference, since most of Walker's types 

 are in that museum. The male in Haliday's collection may well be that from which 

 Haliday's figures (1841-1842 : pi. D, figs. 3, 3a) were drawn. 



Metopon concolor Thomson. Syntypes, 6 specimens. Lectotype, a female 

 labelled " O " [Oland]. The male associated with this species by Thomson may be 

 a small specimen of crassispina. 



Britain, Sweden, Czechoslovakia. 

 Biology. Unknown. Imagines May-August. 



