i 4 G. E. J. NIXON 



more or less oval carapace beneath which the more apical segments are completely- 

 hidden ; a well developed prepectal margin present ; nervellus of the hind wing 

 deeply sinuate, the submediellan cell being produced distally on the vannal lobe 

 side. 



Apical segment of the labial palpus very long, fully twice as long as the short, 

 thick, second segment ........ FORNICIA Brulle 



- Tergites i and (2 + 3) never thus fused to form an oval carapace ; if tergite (2 + 3) 



is itself enlarged to form a rugose carapace (carbonarius-gvoup) , then it is clearly 

 separated from tergite 1 ; nervellus not thus sinuate, except weakly in some 

 species of the lacteus-gvoup .... APANTELES Foerster (p. 17) 



3 Hind wing without a closed cubitellan cell, the transverse, cubitellan vein wanting. 



Ocelli in a high triangle, the transverse, posterior tangent to the anterior ocellus 

 passing far in front of the posterior pair ....... 4 



- Hind wing always with a cubitellan cell, closed distally by the spurious, transverse, 



cubitellan vein ; hardly indicated in the Brazilian genus Prasmodon ... 5 



4 Areolet of the fore wing very large, the 1st abscissa of the radius being much shorter 



than the 2nd ; eyes below very wide apart ; tergite 2 polished and with a 

 weakly indicated, sub-triangular field ; metacarp much longer than its distance 

 from the apex of the radial cell. S. Africa . . . SEMIONIS gen. n. (p. 206) 



- Areolet of the fore wing small, the 1st abscissa of the radius much longer than the 



2nd ; eyes strongly convergent below, touching the clypeus, the distance between 

 them here being at most hardly greater than the distance between a posterior ocellus 

 and the eye-margin (Text-fig. 236) ; tergite (2 + 3) with a large, triangular med- 

 ian field. Australia MIROPOTES gen. n. (p. 200) 



5 Nervellus of the hind wing sinuate so that the submediellan cell is produced distally 



on the vannal lobe side (Text-fig. 345). 



Vannal lobe beyond its widest part with straight or concave edge and here with- 

 out trace of a hair fringe ; cubitellan cell of the hind wing always higher than wide. 6 



- Nervellus of the hind wing not sinuate and normally curved inwards on the vannal 



lobe side ............. 8 



6 Propodeum with costula and more or less distinct areola denned by very strongly 



raised, irregular keels ; tergite 1 very large, subquadrate, highly polished ; tergite 

 (2 + 3) without a basal, median field, tergite 2 being defined as such and occupying 

 the full width of the gaster (Text-fig. 235) ; scape very short (Text-fig. 253) ; 

 inner spur of the hind tibia considerably less than half the length of the hind 

 basitarsus. Central & S. America . . . DASYLAGON Muesebeck (p. 201) 



- Propodeum without a costula and without an areola though it sometimes has a very 



irregularly defined, margined, longitudinal furrow ; tergite 1 neither subquadrate 

 nor highly polished ; scape longer ; inner spur of the hind tibia at least half as 

 long as the hind basitarsus .......... 7 



7 Tergite 1 short, triangularly widened behind ; median field of tergite (2 + 3) co- 



extensive with tergite 2 and occupying the full width of the gaster ; coarsely 

 sculptured and fully two thirds as long as the rest of the tergite ; inner spur of the 

 hind tibia about three quarters as long as the hind basitarsus ; head, in a facial 

 view, not lengthened ; mouth parts not lengthened, the glossa not forked. Central 

 & S. America .... XANTHOMICROGASTER Cameron (p. 264) 



- Tergite 1 elongate, not widened behind, usually markedly narrowed behind ; median 



field of tergite (2 + 3) not coextensive with the whole of tergite 2 and not occupying 

 the full width of the gaster, smooth-looking and not more than half as long as the 

 rest of the tergite ; inner spur of the hind tibia about half as long as the hind 

 basitarsus ; head, in a facial view, lengthened or markedly triangular ; mouth 

 parts lengthened, the glossa deeply forked (Text-fig. 254). Central & S. America 



PROMICROGASTER Brues & Richardson (p. 229) 



