5 94 M. W. R. de V. GRAHAM 



row of hairs, and a few others in the distal half of the cell ; basal cell with a few hairs scattered 

 over its distal quarter to one-third, basal vein pilose ; speculum open below, extending as far 

 as the beginning of the marginal vein ; the latter 1-7 to 1-75 times as long as the stigmal vein ; 

 postmarginal vein as long as, or hardly longer than, the marginal ; stigmal vein forming an 

 angle of about 45 with the postmarginal. 



Gaster ovate, 1 -65 to 1 -g times as long as broad, slightly shorter than head plus thorax, 

 about as broad as the thorax ; last tergite slightly shorter than its basal breadth ; hypopygium 

 extending about half way along the gaster. 



o*. Unknown. 



Holotype $. Scotland : West Inverness, Isle of Rhum, Kinloch, 29.viii.1961, 

 swept from foliage of Betula sp. (Graham), in Hope Department, University Museum, 

 Oxford. 



Paratype $. England : Middlesex, Southgate, 20.viii.1964 (Graham), in Graham 

 collection. 



This species is very close to gracilis (Walker) and gracilentus (Boucek). It differs 

 from the former in having the postmarginal vein slightly shorter, body rather less 

 slender ; gaster shorter than head plus thorax ; flagellum slightly shorter and 

 distinctly stouter, funicular segments a little shorter ; clypeus duller and more 

 strongly reticulate. 



From gracilentus it differs in its rather more transverse head, rather shorter 

 flagellum, duller clypeus ; also its darker antennae and legs, the colour-features, 

 however, might be due to regional variation. 



It differs from decipiens Thomson and its closest ally in its mainly greenish head 

 and thorax, darker scape, less dense sculpture of the scutellum, which is therefore 

 more shiny, and rather shorter and stouter flagellum. 



Cricellius decipiens Thomson 



Cricellius decipiens Thomson, 1878 : 103, 9. 



Type material. Thomson's collection contains 2 $, neither of which bears the 

 correct locality data [Smaland] ; they agree, however, with the description, especially 

 the second specimen labelled " Nv. alp. Bhn " [Norvegia alpina. Boheman] which 

 is taken as an indication of the identity of decipiens. 



Sweden, Norway. 



Biology : Jansson (1952a : 181) recorded the rearing of two specimens of C. 

 decipiens, from thin lime-twigs attacked by insect larvae, by Prof. O. Lundblad at 

 Harparbol, Uppland, Sweden, in 1951. He mentioned four species of predatory 

 beetles reared from the lime-twigs and suggested that the Cricellius might have 

 been attacking the larvae of one of them, or else those of some Ipid or Anobiid 

 beetle, or other insect living on the plant in question. 



TRYCHNOSOMA Graham 



Trychnosoma Graham, 1957c : 140-141. Type-species : Etroxys (Habrocytus) punctipleura 

 Thomson, by monotypy and original designation. 



