RECLASSIFICATION OF MICROGASTERINI 19 



posterior transverse tangent to the anterior ocellus passing far in front of the 

 posterior pair. Indo-oriental region .... schoenobii- group (p. 128) 



- Tergite 2 with a delimited median field ; if the field is large and ill defined then this is 



largely through being as smooth and polished as tergite 3 ; in any case, the median 

 field is never coextensive with the whole surface of tergite 2 and is obviously 

 shorter than tergite 3. . . . . . . . . . . 10 



10 Tergite 1 narrowly wedge-shaped, its horizontal surface at least twice as long as wide 



across the hump (Text-fig. 183). 



Vertex between the eye and the posterior ocellus never with punctures but the 

 surface here and sometimes that of the mesoscutum often with a satin-like sheen 

 (absent in atev-gvoup except in some species with incomplete propodeal areolation) ; 

 propodeum with complete, sharply defined areolation ; oviposter sheath fully as 

 long as the hind tibia. Indo-oriental region . . taeniaticornis- group (p. 120) 



- Tergite 1 not obviously wedge-shaped though frequently markedly narrowed pos- 



teriorly ; horizontal part rarely more than one and a half times as long as wide 

 across the hump and then the hind wing is broader than in the taeniaticornis-group 11 



11 Face rostriform, the clypeo-facial suture lying far below a line joining the eyes below. 



Mesoscutum densely, coarsely, confluently punctate, especially broadly along 

 the course of the notaulices, at posterior end of which the surface becomes striate- 

 punctate ; tergite 1 broad, not at all narrowed posteriorly and with a large, 

 shallow median trough. N. America . . . crassicornis-group (p. 127) 



- Face not rostriform, the clypeo-facial suture lying above or virtually on this line. 



A few S. African species have the face somewhat rostriform and the mouth parts 

 lengthened but these have the areolation of the propodeum reduced to an ill 

 defined V-shaped areola ; such species, and others having a normal face but like- 

 wise with reduced propodeal areolation, are nearly always recognisable by the 

 concavity of the vannal lobe and the shortness of the cubitellan cell of the hind 

 wing. Old and New World. ...... afer-group (p. 25) 



12 Tergite (2 + 3) forming a much enlarged, densely to coarsely rugose segment that 



completely (Philippines) or nearly completely (Europe) hides the more apical 

 segments ; this segment is clearly notched at the lateral extremity of the well 

 marked second suture ; propodeum polished, with medial keel. 



Spp. not exceeding i-8 mm. with concealed ovipositor and the cubitellan cell of 

 the hind wing about three times as long as wide. Old World 



carbonarius-Qroup (p. 147) 



- Tergite (2 + 3) never as large as this and if 3 shows an amount of rugosity approach- 



ing that of 2, then the propodeum is quite differently sculptured . ... 13 



13 Tergite 1 narrow and with a distinct medial constriction (Text-fig. 113). 



Propodeum with a flattened, steep, posterior face, rugose all over and separated 

 from the short, linear, almost smooth upper face by a distinct cristula ; tergite 2 

 with a triangular, median field having base only slightly longer than sides. Africa 



pistrinariae- group (p. 138) 



- Tergite 1 without a medial constriction and if long and narrow, then the tergite is 



gradually narrowed from base to apex and the propodeum never shows a trace of a 

 cristula dividing it into an anterior and posterior face ..... 14 



14 Fore wing with a dark cloud beneath the stigma. 



Propodeum either without or with a faintly indicated areola but without a trace 

 of costulae ; its surface in greater part almost smooth ; ovipositor sheath at least 

 as long as the hind tibia. Fiji Is., Hawaii . . . trifasciatus- group (p. 124) 



- Fore wing without a dark cloud beneath the stigma though the wing is frequently 



brownish all over . . . . . . . . . . .15 



15 Vannal lobe beyond its widest part markedly concave and here without a hair-fringe 



(Text-fig. 131). 



