574 M. W. R. de V. GRAHAM 



acute angle with the postmarginal vein. Gaster sometimes relatively 

 longer ............ 2 



2 (1) Sutures of antennal clava (Text-fig. 430) strongly oblique ; clava slightly more 



than twice as long as broad. Propodeum with costula usually weak, not 

 quite straight but more or less angulate in the middle 



Apelioma restrictum Graham (p. 583) 

 Sutures of antennal clava not, or only slightly oblique ; clava 1-3 to 1-9 times 



as long as broad. Propodeum with costula relatively strong, straight . 3 



3 (2) Gaster 2 to 2-5 times as long as broad ; from nearly as long as, to slightly 



longer than, head plus thorax. Head in dorsal view with temples con- 

 verging rather strongly, about one-third as long as the eyes or slightly more 4 



- Gaster ovate, 1-4 to 1-7 times as long as broad ; not or only slightly longer 



than the thorax. Head in dorsal view with temples sometimes converging 



less strongly and relatively longer ....... 6 



4 (3) Fore wing (Text-fig. 423) with stigma rather small, separated by slightly more 



than twice its height from the costal edge of the wing. Scutellum slightly 

 broader than long, rather weakly convex. Antennae with pedicellus at 

 least very slightly longer than the first funicular segment ; funicular seg- 

 ments relatively short, the first 1 to 1-5 times as long as broad, third 

 quadrate to very slightly transverse, fifth slightly transverse, sixth very 

 distinctly so. 



Propodeum about two thirds as long as the scutellum ; costula situated 

 slightly before the middle. Head, Text-fig. 426 parviclava (Thomson) (p. 577) 



- Fore wing with stigma larger (cf. Text-fig. 424), separated by hardly twice its 



height from the costal edge of the wing. Scutellum slightly longer than 

 broad, moderately convex. Antennae with pedicellus shorter than, or 

 about as long as, the first funicular segment ; funicular segments relatively 

 longer, the first 1-7 to 2 times as long as broad ..... 5 



5 (4) Propodeum (medially) hardly more than half as long as the scutellum ; costula 



placed in, or slightly behind, the middle. Antennae with first funicular seg- 

 ment about 1-5 times as long as the pedicellus and about twice as long as 

 broad ; sensilla in two rows on all the segments of the funicle 



megachlora (Walker) (p. 576) 



- Propodeum (medially) nearly two thirds as long as the scutellum ; costula 



placed slightly in front of the middle. Antennae with first funicular seg- 

 ment about as long as the pedicellus and about 1-7 times as long as broad ; 

 sensilla in two imperfect rows on the proximal segments of the funicle, in 

 only one row on the distal segments. (Sweden) .... sp. indet. 



6 (3) Head in dorsal view (Text-fig. 427) with temples converging more strongly and 



hardly more than one third as long as the eyes. Antennae with first 

 funicular segment at least very slightly, but often much, shorter than the 

 pedicellus. Scutellum as broad as, or slightly broader than, long. Smaller 

 species, up to 2-5 mm. in length, less robust than the following 



squamifera (Thomson) (p. 576) 

 Head in dorsal view (Text-fig. 425) with temples converging less strongly and 

 distinctly more than one third as long as the eyes. Antennae with first 

 funicular segment about as long as, or slightly longer than, the pedicellus. 

 Scutellum tending to be a little longer than broad. Larger, more robust 

 species, up to 3-2 mm. in length ........ 7 



7 (6) Propodeum (medially) only slightly more than half as long as the scutellum. 



Antennal scape barely reaching the level of the lower edge of the median 

 ocellus, its length hardly greater than the transverse diameter of an eye. 

 Temples, in dorsal view of head (Text-fig. 425) somewhat less than half as 



