PTEROMALIDAE OF N.W. EUROPE 717 



middle of median ocellus, slightly expanded in its upper part. Basal vein 

 of fore wing often pilose throughout . . ? perfectus (Walker) (p. 729) 



Dorsal surface of hind coxae bare or virtually so. Antennal scape reaching to 

 about level of top of median ocellus, not expanded in its upper part. Basal 

 vein of fore wing bare or virtually so . elongatus Delucchi & Graham (p. 727) 



26 (24) Stigma of fore wing small, separated by about 3 times its height from the 



costal edge of the wing. Propodeum medially about half as long as the 

 scutellum ............ 27 



Stigma of fore wing larger, separated by 1-9-2-5 times its height from the 



costal edge of the wing ......... 28 



27 (26) Antennal scape slightly expanded in its upper part, its front edge with a shiny 



boss which extends fully half way down. Basal vein of fore wing pilose 

 throughout ; basal cell usually closed below distally. Antennal scape 

 often fuscous distally ; gaster immaculate or with a faint yellowish spot 



bracteatus (Walker) (p. 725) 

 Antennal scape hardly expanded, with an indistinct boss which extends less 

 than half way down. Basal vein of fore wing usually with only 1-4 hairs ; 

 basal cell open below. Antennal scape yellow ; gaster with a distinct, 

 often large, yellowish spot ..... tenellus (Walker) (p. 732) 



28 (26) Propodeum medially slightly less than half as long as the scutellum 



gynetelus (Walker) (p. 725) 

 - Propodeum medially virtually half as long as the scutellum 



lucidus (Walker) (p. 726) 



29 (21) Antennal flagellum yellowish beneath, sometimes also testaceous above. 



Gaster with a distinct yellowish spot . . . repandus (Walker) (p. 722) 



Antennal flagellum fuscous, or at most obscurely testaceous beneath. 



Gaster usually immaculate, sometimes with a small pale spot ... 30 



30 (29) Antennae with sixth funicular segment quadrate or hardly longer than broad ; 



scape barely reaching level of vertex . . . nanus (Walker) (p. 721) 



Antennae with funicular segments relatively longer, the sixth usually 1-5-1-7 

 times as long as broad ; scape sometimes reaching slightly above the level 

 of the vertex ........... 31 



31 (30) Antennal scape not quite reaching the level of the vertex. Basal cell of fore 



wing bare or virtually so .... posticus (Walker) (p. 718) 



Antennal scape reaching slightly to quite distinctly above the level of the 

 vertex. Basal cell of fore wing with 5-7 hairs scattered over its distal part 



coryphe (Walker) (p. 717) 



Trichomalus coryphe (Walker) comb. n. 



Pteromahts Coryphe Walker, 1839 : 266, q*. 



Type material. One male, LECTOTYPE (but possibly holotype), bearing a 

 Waterhouse label. It is very close to the male of posticus (Walker) but differs in 

 small characters which are mentioned in my key to males (q.v.). I have males 

 and females of a species which is certainly different from, although very close to 

 posticus, and the males of this species appear to be identical with the lectotype of 

 coryphe. 



Britain (new records) : Berkshire, Wytham, in a marshy place between the 

 Wood and the River Thames, 1 $, 30.viii.1953 (Graham) ; Cheshire, Redesmere, 



