242 M. W. R. de V. GRAHAM 



fore wing large and subtriangular, as in Miscogaster, separated by at least 

 slightly less than twice its height from the costal edge of the wing. Costal cell 

 of hind wing with hairs scattered over at least its distal half. Hind femora 

 usually testaceous, sometimes slightly infuscate medially, rarely (some very 

 dark British specimens) with their proximal two thirds dark 



clavigerum (Thomson) (p. 243) 

 Sculptured part of gastral petiole transverse ; its front edge sometimes 

 indistinctly carinate. Stigma of fore wing moderate-sized or rather small, 

 not subtriangular, separated by at least slightly more than twice its height 

 from the costal edge of the wing. Costal cell of hind wing usually bare, 

 occasionally with some scattered hairs in its distal half. Hind femora 

 blackish at least proximally, sometimes wholly so except their tips . . 2 



2 (1) Mesoscutum and vertex with numerous and very distinct piliferous punc- 



tures ; mid lobe of mesoscutum with hairs scattered over its whole surface. 

 Antennal seventh funicular segment quadrate, not so very distinctly separat- 

 ed from the clava. Propodeum, just on either side of the median carina, 

 with obsolescent sculpture, hence shiny . . socium (Zetterstedt) (p. 244) 



- Mesoscutum and vertex with fewer and rather indistinct piliferous punctures ; 



mid lobe of mesoscutum most often lacking hairs down its middle part. 

 Antennal seventh funicular segment at least slightly longer than broad, 

 very distinctly separated from the clava. Panels of median area of pro- 

 podeum distinctly reticulate and often with strong wrinkles as well . . 3 



3 (2) Antennal scape distinctly shorter than the transverse diameter of an eye, 



2-6 to 2-7 times as long as broad. Sculptured part of gastral petiole 

 nearly always with one to three (or four) hairs on each side, its front edge 

 raised to form a sharp curved transverse carina ..... 4 



- Antennal scape nearly or quite as long as the transverse diameter of an eye, 3 



to 3-5 times as long as broad. Sculptured part of gastral petiole without 

 hairs at the sides, its front edge usually having a less regular, and sometimes 

 weak, transverse carina ......... 5 



4 (3) Malar space slightly more than two fifths the length of an eye ; breadth of 



oral fossa about 2-6 times the malar space. Propodeum with a pair of 

 straight submedian longitudinal carinae present, the median carina straight 

 and strong ; costula strong throughout. Mid and hind femora more 

 extensively pale, only about the proximal third of the hind femora dark 



triangulate (Thomson) (p. 244) 



- Malar space about one third the length of an eye ; breadth of oral fossa about 



3-5 times the malar space. Propodeum without straight submedian longi- 

 tudinal carinae, though sometimes irregular oblique carinae are present ; 

 median carina irregular, or forked from its base ; costula tending to be 

 irregular and sometimes weak. Mid and hind femora with at least their 

 proximal two thirds blackish .... mirabile Delucchi (p. 245) 



5 (3) Antennal seventh funicular segment 1-5 to i-8 times as long as broad. 



Cubital vein, on lower surface of fore wing, with at least some hairs 



novickyi Delucchi (p. 245) 



- Antennal seventh funicular segment about 1-35 times as long as broad. 



Cubital vein, on lower surface of fore wing, bare ? glaucum Delucchi (p. 246) 



(Males) 



1 Antennal pedicellus strongly swollen, as long as anelli plus first funicular 



segment. In other respects similar to the male of socium (see couplet 3 

 below), but piliferous punctures of vertex and mesoscutum less distinct, 



