io 4 M. W. R. de V. GRAHAM 



- Combined length of pedicellus and flagellum at most i -5 times the breadth of 



the head ; funicular segments relatively shorter (the first 1-72 to 2, the 

 sixth 1 to 1 -3 times, as long as broad) ; scape fully three quarters as long as 

 an eye, hardly dilated above the middle, with only a short and indistinct 

 shiny area subapically. Stigmal vein forming a less acute angle with the 

 postmarginal vein .......... 3 



3 (2) Antennal flagellum stouter, at least slightly stouter than the pedicellus when the 

 latter is seen in dorsal view. Genae moderately buccate. Scutellar 

 frenum distinctly more coarsely reticulate than the disc of the scutellum. 

 Femora at least slightly infuscate, tibiae sometimes slightly so 



coelius (Walker) (p. 105) 



- Antennal flagellum more slender, not stouter than the pedicellus when the 



latter is seen in dorsal view. Genae strongly buccate. Scutellar frenum 

 not more coarsely, or even rather more finely, reticulate than the disc of the 

 scutellum. Femora and tibiae testaceous . . cisae Hedqvist (p. 106) 



Plutothrix trifasciatus (Thomson) 



Trigonoderus trifasciatus Thomson, 1878 : 11, <J $. 



Plutothrix Forsteri Mayr, 1904 : 586-587, <J. 



Plutothrix trifasciatus (Thomson) Novitzky, 1955 : 31, 6* 9- 



Plutothrix trifasciatus (Thomson); Kerrich & Graham, 1957 : 293. 



Plutothrix trifasciatus (Thomson); Ferriere & Kerrich, 1958 : 28, 0* $. 



Type material. For designation of lectotype for Trigonoderus trifasciatus Thomson 

 see Kerrich & Graham (1957 : 293). Plutothrix foersteri was synonymized with 

 trifasciatus by Ferriere & Novitzky (see Novitzky, 1955 : 31). 



Britain, PDenmark, Sweden, Czechoslovakia, Moldavian SSR. 

 Biology. Unknown. Imagines June-Sept. 



Plutothrix scenicus (Walker) 



? Diplolepis bicolorata Spinola, 1808 : 221. 



Pteromalus scenicus Walker, 1836a : 10, <£ $. 



Pteromalus invenustus Walker, 1836a : 11, <J. 



Pteromalus praepileus Walker, 1836a : 12, 9. 



Hetroxys scenicus (Walker) Haliday, 1841-1842 : v, pi. G, fig. 1, $. 



Trigonoderus vittiger Thomson, 1878 : 12, <J $. 



Trigonoderus apicalis Thomson, 1878 : 12, <$ $. 



Plutothrix scenicus (Walker) Kerrich & Graham, 1957 : 2 93 -2 96- 



Plutothrix scenicus (Walker) ; Ferriere & Kerrich, 1958 : 28, $ $. 



Type material. Diplolepis bicolorata Spinola. Kerrich & Graham (1957 : 294) 

 reported that the type of this species could not be located and stated that the 

 original description was insufficient to justify the adoption of the name. Walker 

 himself queried bicolorata as a synonym of scenicus (1846 : 50). After reading 

 Spinola's description again I think that bicolorata may well have been the same as 

 scenicus. Spinola's mention that he had often seen bicolorata at rest beneath leaves 

 of Corylus might apply to several species but is rather interesting, because on more 

 than one occasion I have observed scenicus doing this. 



