PTEROMALIDAE OF N.W. EUROPE 623 



Type material. Holotype $, Czechoslovakia, Hradec Kralove-Piletice i.vi.1952 

 (Boucek), in Narodni Museum, Prague (Cat. no. 3044). 



Britain, France, Czechoslovakia. 



Biology. Parasite of Tetramesa eximia (Giraud) in stems of Calamagrostis spp. 

 (see Claridge, in Graham & Claridge, 1965 : 304). Imagines May and June. 



Chlorocytus ultonicus Graham 



(Text-fig. 500) 



Chlorocytus ultonicus Graham, in Graham & Claridge, 1965 : 288, 304-305, $. 



Type material. Holotype $, England : Berkshire, Wytham Wood, 29. vi. 1958 

 (Graham) in Hope Department, University Museum, Oxford. 



England, Ireland. 



Biology. Not definitely known ; some Chlorocytus reared from stems of Phleum 

 sp. by Dr. Claridge may belong to ultonicus, but this is not certain. 



Chlorocytus phalaridis Graham 



(Text-figs. 486, 498) 



Chlorocytus phalaridis Graham, in Graham & Claridge, 1965 : 287, 305-306, <$ $. 



Type material. Holotype $, England : Buckinghamshire, Oakley Wood, reared 

 5.V.1957 from shoots oiPhalaris arundinacea L. (M. F. Claridge) in Hope Department, 

 University Museum, Oxford. 



Britain, Ireland. 



Biology. Dr. Claridge has found that this species normally attacks Tetramesa 

 longicornis (Walker) in the upper internodes of Phalaris arundinacea L. (see Claridge, 

 in Graham & Claridge, 1965 : 306). Imagines mainly May-August (occasionally 

 some in April). 



Chlorocytus deschampsiae Graham 



(Text-figs. 488, 499) 



Chlorocytus deschampsiae Graham, in Graham & Claridge, 1965 : 288, 306-307, $ $>• 



Type material. Holotype $, England: Buckinghamshire, Oakley Wood, reared 

 28. v. 1958 from culm of Deschampsia (M. F. Claridge), in Hope Department, 

 University Museum, Oxford. 



Britain. 



Biology. Parasite of some of the Eurytomid species, especially Tetramesa 

 petiolata (Walker), whose larvae live above the internodes (without gall-formation) 

 in the stems of Deschampsia caespitosa (L.) Beauv. (see Claridge, in Graham & 

 Claridge, 1965 : 307). Imagines May-June. 



