PTEROMALIDAE OF N.W. EUROPE 619 



Chlorocytus formosus (Walker) 



(Text-figs. 469, 501) 



Pteromalus formosus Walker, 1835a : 189, $. 



Chlorocytus formosus (Walker) Graham & Claridge, 1965 : 268, 271, 285, 289-291,0* $. 



Type material. Lectotype $ designated by Graham (in Graham & Claridge, 

 1965 : 290). The species was redescribed by Graham in the same paper 

 (1965 : 289-290). 



Britain, Ireland ; widely distributed but local ; Amurland, BM(NH) coll., 

 one female under a Walker manuscript name " aequalis "). 



Biology. Reared from stems of Br achy podium sylvaticum (Huds.) Beauv., 

 together with Tetramesa fulvicollis (Walker), the latter possibly being its host (see 

 Claridge in Graham & Claridge, 1965 : 290-291). Imagines chiefly June and July 

 (occasionally August). 



Chlorocytus longiscapus Graham 

 (Text-fig. 503) 



? Trigonoderus Polichna Walker, 1848 : 128, 218, <J. 



Chlorocytus longiscapus Graham in Graham & Claridge, 1965 : 286, 291-292, $>. 



Type material. Trigonoderus polichna Walker. One male, LECTOTYPE, 

 bearing a Waterhouse label " Hetroxys Polichna " also a printed label " Polichna ". 

 This specimen appears to be identical with a male in my collection which may well 

 be that of Chlorocytus longiscapus ; they show the unusual feature of the middle 

 tibia being somewhat darkened medially. In view of the difficulty of associating 

 the sexes of some Chlorocytus without reared material, I am not proposing a definite 

 synonymy for the present. 



Chlorocytus longiscapus Graham. Holotype $, England, Berkshire, Wytham 

 Wood, 3.viii.i952 (Graham), in Hope Department, University Museum, Oxford. 



Britain, Ireland, Sweden, Austria. 

 Biology. Unknown. Imagines July-Sept. 



Chlorocytus diver sus (Walker) 



(Text-fig. 492) 



Pteromalus diversus Walker, 1836 : 483, $. 



Pteromalus Rhytium Walker, 1848 : 125, 198,0*- 



Pteromalus Sybritia Walker, 1848 : 126, 203, $. 



Etroxys (Habrocytus) laeviusculus Thomson, 1878 : 121, ^ $. 



Chlorocytus diversus (Walker) Graham, 1956 : 94. 



Chlorocytus diversus (Walker) ; Graham & Claridge, 1965 : 289, 292-294, o* $• 



Type material. For synonymy and designation of lectotypes, see Graham and 

 Claridge (1965 : 293-294) ; the species was redescribed by Graham in the same 

 paper (1965 : 293). 



