56 GENERA OF HYMENOPTERA. 



Posterior femora simple ; head transverse, vertex not or scarcely excavate, 

 the middle ocellus not placed in a fovea. 



Abdomen linear, longer than the thorax Macrocentrinee. 



Abdomen ovate, not longer than the thorax. 

 Occiput margined, distinct from the vertex ; anal cell of anterior wings 



with an incomplete transverse nervure Diospilinse. 



Occiput not margined; anal cell of anterior wings without transverse 

 nervure Opiinse. 



Div. v.— EXODONTES. 



Anterior wings with three submarginal cells, rarely apterous or subapterous. 



Alysiinse. 

 Anterior wings with two submarginal cells Dacnusinse. 



Div. VI.— FLEXILIVENTRES. 



Posterior wings with only two longitudinal nervures; the median cell often in- 

 complete, the submediau cell wanting Aphidiinee. 



Table of Genera. 

 Division I.— CYCLOSTOMI. 



Subfamilv Braconin.*:. 



Abdomen with numerous broad strongly serrate transverse impressions. 



'-Iphiaulax Forst. 

 .\bdomen without or with only one serrate transverse impres-sion. 

 Clypeus with two tufts of hair at base; mouth elongate, beak-like; abdominal 



segments 1-2 straight, not rectangularly articulated '''-Vipio I^itr. 



Clypeus without hair-tufts at base ; mou.'i not prolonged ; abdominal segments 

 1-2 rectangularly articulated Bracoil Fabr. 



Subfamily ExoTHPXiN.ii:. 



Suturiforni articulation distinct, sometimes creuate -''Phanoineriti Forst. 



Suturiform articulation obsolete. 



Marginal nervure originating beyond the middle of stigma. 



''Xeiiarcha Forst. 

 Marginal nervure originating much before the middle of stigma. 



E.YOthe('us Wesin. 

 Marginal nervure originating from the middle of stigma. 

 Second submarginal cell receiving the recurrent nervure. 



'^'BathystomiiB Forst. 

 First submarginal cell receiving the recurrent nervure. 



'^Rhysipolis Forst. 



Subfaiiiilv Rhyssalin^, 



Posterior tarsi shorter than their tibiae, the latter iucnissate in %\ metathorax 

 areolated ; marginal nervure originating somewhat beyond tlio middle 

 of stigma; recurrent nervui-e interstitial ^RIiyMSaluci Hal. 



