152 G. E. J. NIXON 



- Ovipositor straight for most of its length, its sheaths about twice as long as the hind 



tibia ; in lateral view, the ovipositor is deeply sinuate at apex (Text-fig. 168). 



Propodeum without a longitudinal keel but with strong rugosity surrounding 

 the posterior orifice ; metacarp fully five times as long as its distance from the apex 

 of the radial cell ; radial cell markedly downcurved at apex. Australia 



briareus sp. n. (p. 153) 



12 Hind coxa and hind femur yellow ; basal half of gaster dull red ; lower side of 



flagellum (antenna being stretched forwards) with unusually long pubescence, the 

 longest hairs being fully equal to two thirds the width of the segments ; inner spur 

 of the middle legs reaching almost to apex of second tarsal segment. 



Legs entirely yellow except for the darkened apex of the hind tibia and the 

 entirely dark hind tarsus. Africa .... hebrus sp. n. (p. 156) 



- At least the hind coxa black ; basal half of gaster blackish ; lower side of flagellum 



without such long pubescence ; inner spur of the middle legs not reaching beyond 



apex of basal segment of tarsus ......... 13 



13 Propodeum without trace of a median, longitudinal keel but with some strong rugae 



extending upwards from the posterior orifice . . . . . . . 14 



- Propodeum always with a distinct, median longitudinal keel (sometimes the keel is 



double, except anteriorly). 



Ovipositor with an apical attenuation . . . . . . . 15 



14 Hind legs, distal to coxae, predominantly reddish-yellow ; cubitellan cell of the hind 



wing higher than wide ; temples shiny and with only feeble punctation. Malaya 



melpomene sp. n. (p. 155) 



- Hind legs, distal to coxae, predominantly blackish with the hind tibia and hind 



basitarsus both sharply yellowish-white on basal half ; cubitellan cell slightly wider 

 than high ; temples dull and with strong contiguous punctation. Ceylon 



prusias sp. n. (p. 155) 



15 Mesoscutum dull, with a fine, glistening rugosity in which there is virtually no trace 



of punctation ; disc of scutellum also dull, with a fine, rugulose-aciculate 

 sculpture. 



Metacarp three and a half to four times as long as its distance from the apex of the 

 radial cell. Africa ....... pyrene sp. n. (p. 157) 



- Mesoscutum either smooth, shining, or with a clearly punctate sculpture that 



becomes irresolvable only sometimes along course of notaulices . . . . 16 



16 Propodeum, especially across brow, dull, densely, almost coarsely rugose. 



Posterior corners of the propodeum rather raised, the surface between them and 

 the very strong medial keel subvertical, slightly hollowed out and covered with 

 some sort of coarse rugosity ; preapical segment of the antenna hardly longer than 

 wide. Europe ........ vindicius sp. n. (p. 157) 



- Propodeum much more finely sculptured, in greater part smooth and polished and, if 



more sculptured, then the sculpture of the brow fine and more or less even . 17 



17 Horizontal part of tergite 1 dull, strongly rugose all over (more so than in any other 



species of the group) ; wings markedly brownish. 



Mesoscutum somewhat dull, but sharply punctate. Africa lynceus sp. 11. (p. 157) 



- Horizontal part of tergite 1 without such strong sculpture, at most with fine micro- 



sculpture and scattered punctures, more especially where it turns over ; wings 

 hyaline ............. 18 



18 Mesoscutum highly polished, impunctate ; metacarp about one and a half times 



longer than its distance from the apex of the radial cell. 



Distance between the posterior ocelli much greater than the distance between 

 one of them and the eye-margin. Australia . . . alfalfae Nixon (p. 163) 



- Mesoscutum somewhat dull, finely and quite distinctly punctate ; metacarp at least 



about twice as long as its distance from the apex of the radial cell . . . 19 



