356 M. W. R. de V. GRAHAM 



— Notauli not nearly reaching the hind margin of the mesoscutum . . . 1 8 



16 (15) Marginal vein of fore wing rather abruptly thickened in its proximal half, 



much as in Muscidifurax (Text-fig. 291) ; antennae 11353, inserted at least 

 slightly below the level of the ventral edge of the eyes ; thorax much 

 depressed, scutellum nearly flat . . PLATECRIZOTES Ferriere (p. 848) 



Marginal vein of fore wing thickening only slightly and gradually from apex 

 to base ; either the antennal formula and insertion otherwise, or else 

 thorax not depressed ......... 17 



17 (16) Frons (Text-fig. 287) with a strongly raised crest between the antennal 



scrobes ; face slightly concave ; hind tibia with two spurs, of which the 

 outer one is short but very thick ; clypeus (Text-fig. 287) large, its anterior 

 margin with a pair of large rounded lobes ; notauli distinctly impressed 

 throughout ; hind femora strongly swollen, excluding the trochantellus, 

 only about 2-5 times as long as broad ; antennae with two anelli and six 

 funicular segments PERNIPHORA Ruschka (p. 428) 



- Frons with at most a weak crest between the antennal toruli ; hind tibia 



with only one (the innermost) apical spur ; anterior margin of clypeus of 

 different form ; except in Dorcatomophaga, which sometimes has three 

 anelli and five funicular segments, the notauli are very superficial 

 posteriorly and the hind femora are not so strongly swollen . . . 18 



18 (17) Head massive, in dorsal view (Text-fig. 288) less than twice as broad as long, 



with the temples fully three quarters as long as the small eyes ; POL equal 

 to OOL ; malar space three quarters the length of an eye ; mesopleuron 

 wholly reticulate ; scrobes rather deep, with a crest or tubercle between 

 the antennal toruli . . XIPHYDRIOPHAGUS Ferriere (p. 426) 



— Either the head is less massive or, if it approaches the above in form (Text-fig. 



304) then POL is slightly greater than OOL ; the mesopleuron has a more 

 or less smooth area below the base of the hind wing ; and either the temples 

 are relatively shorter, or the scrobes are shallow without a crest or tubercle 

 between the toruli .......... 19 



19 (18) Clypeus (Text-fig. 290) extremely large, its breadth fully equal to the distance 



separating its lateral border from the adjacent eye, reticulate, its anterior 

 margin not sinuate laterally but weakly emarginate over its whole breadth ; 

 labrum partly visible ; POL slightly less than OOL ; antennae with three 

 anelli and five funicular segments ; hind tibiae with two spurs, the 

 second quite strong ; mesopleuron wholly reticulate 



HABRITYS Thomson (p. 427) 



- Not having the above combination of characters. Clypeus nearly always 



relatively smaller, if approaching the above in size then it is more or less 

 strigose with its anterior margin sinuate laterally, whilst the labrum is 

 concealed, POL is not less than OOL, the antennae have two anelli and six 

 funicular segments, and the hind tibiae have only one spur ... 20 



20 (19) Ovipositor far exserted, the length of the exserted portion of its sheaths at 



least half that of the hind tibia ; antennae with three anelli and five 

 funicular segments . . . . . . . . . .171 



Ovipositor sheaths rarely so far exserted, if so then the antennae have two 



anelli and six funicular segments. . . . . . . .21 



21 (20) Gastral tergites one to five more or less, sometimes deeply, incised in the 



middle of their hind margin (Text-fig. 289) ; antennal clava (Text-figs. 

 339-341) with a large area of micropilosity ; flagellum more or less strongly 

 clavate, either with two anelli and six funicular segments, or with three 

 anelli and five funicular segments ; anterior margin of clypeus bidentate ; 



