XII, D, 5 Baker: Ichneumonoid Parasites 283 



c'. First abscissa of radius shorter than second. 

 cT. Hind tibial spurs distinctly curved, naked entirely or in part; max- 

 illary palpi with one or several joints modified or dilated. 

 c\ Metanotum without lateral prominences posterior to spiracles; 

 spiracles circular or oval. 

 f. Maxillary palpi with third joint enlarged, but not flattened; 

 second cubital cell twice as long as high and not narrowed 

 apically; metanotal spiracles raised on umbos; mesopleura 



with discal furrows Colastomion g. nov. 



f. Maxillary palpi with several joints flattened and sometimes 

 twisted; second cubital cell three times as long as high and 

 distinctly narrowed apically; metanotal spiracles not raised; 

 mesopleura without discal furrows.... Macrostomion Szepligeti. 

 e\ Metanotum with blunt lateral prominences posterior to the spir- 

 acles; spiracle elliptical; second cubital cell nearly or quite 

 three times as long as high and distinctly narrowed apically; 



vertex back of ocelli very short Macrostomionella g. nov. 



d^ Hind tibial spurs straight or nearly so, pubescent; maxillary palpi 

 normal, slender, rarely with certain joints inflated, as in Pseudo- 

 gyroneuron. 

 g^. Transverse median and postmedian veins normal, straight. 

 h^. Metanotum without distinct lateral prominences. 



•p-. Abdomen distinctly subpetiolate, the first segment long and 



strongly narrowed toward base; second abscissa of radius 



three or four times length of first; ocelli and eyes very 



large; malar areae and cheeks relatively small; abdomen 



conspicuously longer than head and thorax together. 



y. Metathoracic spiracles elliptical; mesopleura with strong 



discal furrows; second abscissa of radius swollen at base 



(in Philippine species) ; size large. 



Megarhogas Szepligeti. 

 f. Metathoracic spiracles round or oval; mesopleura without 

 discal furrows or with rudiments only; size medium. 



Trigonophatnus Cameron. 

 1^. Abdomen broadly sessile, the first segment very slightly nar- 

 rowed toward base and very broad for the length; second 

 abscissa of radius less than three times length of first; 

 ocelli and eyes varying from large to small; abdomen not 

 or but little longer than head and thorax together. 

 fc\ Submedian cell as long as median on the median vein, 

 transverse median vein interstitial with basal; ocelli 

 very small; radial vein of hind wings on basal third, 

 suddenly, strongly curved toward costa. 



Rhogasella g. nov. 



k-. Submedian cell always longer than median on the median 



vein, usually much longer; ocelli large to small; radial 



vein of hind wings not suddenly curved toward costa, 



although radial cell broadened apically in some species. 



Rhogas Nees. 

 /l^ Metanotum laterally with strong prominences; mesonotum 

 deeply trilobed; radius in hind wing curved toward costa. 

 150687 2 



