PTEROMALIDAE OF N.W. EUROPE 235 



(6) Sculptured part of gastral petiole quadrate or at most very slightly transverse, 

 slightly more than half as long as the propodeum ; its front edge with a 

 sharp transverse carina. Mid femora more slender, excluding the trochan- 

 tellus, about five times as long as broad. Combined length of pedicellus and 

 flagellum about 1 -5 times breadth of head ; flagellum rather more slender 

 than in splendens ...... annularis (Walker) (p. 237) 



Sculptured part of petiole 1 -6 to 3 times as broad as long, less than half as long 

 as the propodeum ; its front edge sometimes with a sharp transverse carina, 

 sometimes without. Mid femora rather stouter, excluding the trochan- 

 tellus, 4 to 4-5 times as long as broad. Combined length of pedicellus and 

 flagellum 1 -3 to 1 -4 times breadth of head ; flagellum rather stouter 



splendens Westwood (p. 238) 



(Males) 



Antenna (Text-fig. 184) with pedicellus longer than the scape, greatly swollen ; 

 flagellum subclavate ; first funicular segment shorter and narrower than 

 the second. Hind margin of basal tergite of gaster distinctly, that of the 

 two following tergites slightly, emarginate in the middle 



pschorni Delucchi (p. 241) 



Antennae with pedicellus much shorter than the scape, not swollen ; flagellum 

 filiform, or even tapering very slightly distad ; first funicular segment 

 slightly longer than, and as broad as, the second. Hind margins of gastral 

 tergites often entire .......... 2 



(1) Antenna (Text-fig. 183) with flagellum with subdecumbent hairs ; clava 



relatively short, 2 to 2-8 times as long as broad ; scape about three times as 

 long as broad, two thirds or slightly more than two thirds as long as an eye. 

 Gastral petiole without a distinct anterior crest . picinervis Thomson (p. 240) 

 Antennal flagellar hairs standing out at an angle of 30 to 60° ; clava 3 to 35 

 times as long as broad ; scape 2-3 to 2-5 times as long as broad and, 

 except in crassipes, not or only slightly more than half as long as an eye. 

 Gastral petiole sometimes with a sharp transverse anterior crest . . 3 



(2) Antenna : outer surface of scape with a large shiny boss in its upper part, 



extending about two thirds down ; combined length of pedicellus and 

 flagellum 1-9 to 2 times breadth of head ; hairs of flagellum standing out 

 at an angle of 45 to 6o°, their length at least two thirds the breadth of the 

 segments that bear them. Sculptured part of gastral petiole about as long 

 as broad, its front edge raised to form a sharp transverse crest 



annularis (Walker) (p. 237) 

 Antennae : outer surface of scape without a shiny boss, or with at most a 

 small one which extends less than half way down ; combined length of 

 pedicellus and flagellum 1 -3 to 1 -7 times breadth of head ; hairs of flagellum 

 tending to stand out less strongly. Sculptured part of gastral petiole very 

 often distinctly transverse, sometimes without a distinct anterior crest . 4 



(3) Sculptured part of gastral petiole having its front edge raised to form a sharp 



transverse crest, which is usually curved ...... 5 



Sculptured part of gastral petiole without, or with at most a weak and 



irregular transverse crest anteriorly ....... 6 



(4) Hind femora very stout, excluding the trochantellus, only 3 to 3-5 times as 



long as broad ; usually only partly, rarely mainly, infuscate ; fore and mid 

 femora pale, or with at most a small dark streak beneath. Antenna with 

 hairs of flagellum standing out at an angle of 30 to 40 . Sculptured part 

 of gastral petiole varying from quadrate to 1-3 times as broad as long ; its 

 front edge raised to form a sharp transverse crest crassipes Thomson (p. 238) 



