282 The Philippine Journal of Science mi 



acters. The pronotum is extended in widely variable degrees; 

 its anterior outline is very various and is difficult to describe. 

 The mesonotum varies from deeply trilobed to evenly convex, 

 and the notauli from deeply impressed to subobsolete. The 

 scutellar fovese and the sculpturation of the metanotum and the 

 abdominal tergites are good sources of diagnostic characters. In 

 all Philippine species the lower angle of the metapleura is pro- 

 duced in a broad tooth above the hind coxal cavity, and the form 

 of this tooth presents considerable variety. The eye is always 

 emarginate within in the large-eyed forms, although the depth 

 of emargination is variable. The nervellus in the hind wings 

 is almost always oblique, although it varies from straight to 

 curved or even to angularly bent at the middle; it is rarely 

 vertical as in Neorhyssalus. 



The following genera and species are described in this paper : 



Rhyssalus unicolor Ashmead. Megarhogas szepligetii sp. nov. 



Rhyssalus ashmeadii sp. nov. Trigonophatnus nigricoDiis sp. nov. 



Neorhyssalus compositus g. et sp. Trigonophatnus philippinensis sp. 



nov. nov. 



Heterogamus longicollis sp. nov. Rhogasella straininea g. et sp. nov. 



Colastomion abdominalis g. et sp. Rhogasella lineata sp. nov. 



nov. Pseudogyroneuron 7nindanaensis g. 

 Macrostomion debilis sp. nov. et sp. nov. 



Macrostomionella philippinensis g. Paragyroneuron bicolor g. et sp. nov. 



et sp. nov. Gyroneuronella kokujewii g. et sp. 

 Macrostomionella similis sp. nov. nov. 



Megarhogas stigmaticus sp. nov. Hemigyroneuron speciosus g. et sp. 

 Megarhogas philippinensis sp. nov. nov. 



Megarhogas mindanaensis sp. nov. Hemigyroneuron suffusus sp. nov. 



BRACONID^ 



RHOGADIN^^ 



Synopsis of the Philippine genera. 



a\ Metanotum laterally, partly or entirely, areolated; ovipositor long. 



6". Recurrent vein entering second cubital cell; metanotum with antero- 

 lateral are» only; radius in hind wings obsolete. 



Rhyssalus Haliday. 

 b'. Recurrent vein entering first cubital cell; metanotum fully areolated. 



Neorhyssalus g. nov. 

 a'. Metanotum laterally not areolated; ovipositor short; recurrent vein 

 entering first cubital cell or interstitial. 

 c\ First abscissa of radius longer than second; second cubital cell quad- 

 rate; terminal abdominal segments retracted; radius in hind wing 

 obsolete; hind tibial spurs straight, very short, pubescent. 



Heterogamus Wesmael. 



