218 G. E. J. NIXON 



Key to Species 



Females 



i Fulvous species with at most the apex of the hind tibia and the whole of the hind tarsus 

 blackened and sometimes the middle of tergite i ; edge of vannal lobe beyond its 

 widest part more or less straight ; median field of tergite (2 + 3) less transverse, sub- 

 triangular, better defined .......... 2 



- At least the thorax in greater part blackish ; vannal lobe beyond its widest part 



concave ; median field of tergite (2 + 3) more transverse, very poorly defined 

 laterally. 



Face always coarsely rugose-punctate ; mesoscutum, except posteriorly, sharply, 

 strongly and distinctly punctate ; mouth parts normal ; neither glossa nor 

 galea lengthened (Text-fig. 265) ......... 4 



2 Mouth parts greatly lengthened, the glossa deeply excised and the galea fully twice as 



long as wide (Text-fig. 269). 



Mesoscutum thickly pubescent but polished and without punctation ; radius 

 leaving stigma rather far distal to middle ; tergite 1 more strongly narrowed to 

 apex than in the next two species and with its distal, turned over part polished ; 

 median field of tergite (2 + 3) having a more pronounced subtriangular appearance 

 than in the next two species ....... apo (Wilkinson) 40 



Philippines: Luzon, Mt. Makiling, Atimonan (type locality) ; Los Banos ; 

 Mindanao. Type in the Zoological Museum, Berlin. 



- Mouth parts not thus lengthened, the glossa at most slightly excised and the galea 



much less than twice as long as wide ........ 3 



3 Mesoscutum, at least over anterior half, thickly and quite conspicuously punctate ; 



stigma emitting radius only slightly beyond middle (Text-fig. 260) ; fore wing with 

 darkened apex as in the next species but proximal to this still markedly embrowned; 

 head less transverse ; face with more distinct evidence of punctation. 



Tergite 1 on each side, where it turns over, with a variable amount of rather 

 strong punctation ......... papua (Wilkinson) 41 



Papua: Kokoda (type locality). Type in the British Museum (Nat. Hist.). 



There seems to be some variation in the point of emission of the radius on the 

 stigma, some specimens showing it rather more distal than others. 



- Mesoscutum in front with only the merest trace of punctation ; stigma emitting radius 



more distinctly distal to middle ; fore wing proximal to the darkened apex virtually 

 hyaline ; head more transverse (Text-fig. 274) ; face with much less distinct 

 evidence of punctation. 



Antennal sockets more deeply set than in papua, the surface behind each socket 

 somewhat hollowed out so that the rim of the socket is raised ; the suture between 

 the mesoscutum and the disc of the scutellum is divided by three costae, of which 

 the middle one is the strongest, into four large foveae ; in papua only the middle 

 costa is developed (too much importance should not be placed on this difference 

 between the species) ......... nephta sp. n. 



Philippines: Mindanao, Dapitan, 1 $, the TYPE, (Baker). Type in the U.S. 

 National Museum. 



This species is very closely related to papua but the differences seem to be suffi- 

 ciently strong to justify a specific name. The apex of the hind tibia in nephta and 

 the whole of the hind tarsus is blackened ; tergite 1 , where it turns over, is broadly 

 darkened along the middle. 



l0 Microgaster apo Wilkinson, 1929 : 108. 



Hypomicrogaster apo (Wilkinson) comb. n. 

 il Microgastev papua Wilkinson, 1936 : 86. 



Hypomicrogaster papua (Wilkinson) comb. n. 



