PTEROMALIDAE OF N.W. EUROPE 359 



Eyes bare or with relatively short inconspicuous pubescence. Antennal 

 clava with a small area of micropilosity on its apical segment only. Except 

 in some Tritneptis and Cyclogastrella, which have the occiput immarginate, 

 the basal cell of the fore wing is bare or virtually so, and the speculum is 

 larger and open below. Gaster sometimes pointed apically ... 29 



29 (28) Fore wing (Text-fig. 293) with upper surface, just beyond the middle, with 



notably sparse pilosity ......... 30 



- Fore wing (Text-figs. 294, 296) : upper surface, beyond the middle, with 



ordinary, moderately dense or dense pilosity ..... 34 



30 (29) Fore wing (Text-fig. 293) with a broad bare strip below the marginal vein, 



extending to the stigmal vein and broken by at most a few scattered hairs 

 on the lower surface of the wing. Genae moderately to strongly com- 

 pressed, usually sharp near the bases of the mandibles . . . . 31 

 Fore wing (Text-fig. 294) either without a bare strip below the .marginal vein, 

 or else having one on the upper surface only, effaced on the lower surface 

 by numerous hairs. Genae at most slightly compressed, not sharp . 35 



31 (30) Vertex, behind the ocelli, horizontal and nearly flat, forming a sharp abrupt 



edge with the occipital surface, which descends at about a right angle to 

 the vertex. Gaster ovate, at least slightly pointed apically 



DIBRACHOIDES Kurdjumov (p. 814) 



- Vertex curving over into the occiput and at most forming a vague ridge 



where the two surfaces join, but usually without a ridge. Gaster sub- 

 circular, obtuse apically, not counting the ovipositor sheaths, which 

 sometimes project very slightly . . . . . . . .32 



32 (31) First funicular segment of antenna (Text-fig. 295) subconical, constricted in 



its proximal half, about as long as the second and third segments together ; 

 anelli short and strongly transverse. Marginal vein of fore wing only 1 -2 to 

 1*4 times as long as the stigmal vein . CONOMORIUM Masi (p. 821) 



- First funicular segment of antennae not constricted proximally, at most a 



little longer than the second segment ; anelli sometimes longer and less 

 transverse. Marginal vein of fore wing 1 -7 to 2 times as long as the stigmal 

 vein 33 



33 (32) Head strongly protuberant at level of antennal toruli, face receding strongly ; 



antennae inserted at or below level of ventral edge of eyes ; anelli large, 

 at least the second anellus quadrate or only slightly transverse. Scutellar 

 frenum not distinctly marked off, except sometimes at the sides 



KRANOPHORUS Graham (p. 819) 



Head not protuberant at level of toruli, face not receding strongly ; anten- 

 nae inserted very slightly above level of ventral edge of eyes ; anelli 

 moderate-sized, both quite strongly transverse. Scutellar frenum marked 

 off by a distinct impressed line . SCHIZONOTUS Ratzeburg (p. 817) 



34 (29) Antennae inserted at or even slightly below level of ventral edge of eyes. 



Fore wing usually immaculate, occasionally with a fuscous cloud in the 

 middle ; apical margin nearly always bare at least between the end of the 

 postmarginal vein and the tip of the wing, if not then the head is strongly 

 protuberant at the level of the antennal toruli ..... 35 



Antennae inserted at least slightly above level of ventral edge of eyes. Fore 

 wing usually with a fuscous cloud below the marginal vein ; apical margin 

 ciliate throughout. Head slightly to moderately protuberant at level of 

 antennal toruli .......... 37 



35 (34) Vertex separated from the occipital surface by a transverse carina, at least 



in the middle. 



