SPHI':G1GASTERID.£. 



§§ Sixth abdominal segment hardly one-third 

 or hardly half the length of the fifth ; 

 seveuth very small ; eighth not visible 

 (perhaps wholly wanting). - - Hypsicamara. 



■■■•■■■ Ulna not incrassated. 

 f Apical joint of the maxillary palpi much 

 incrassated in the male, clavate or 

 spatulate. 

 | Third abdominal segment not or hardly 



shorter than the second. - - Cyrtogaster. 



H Third abdominal segment much shorter 



than the second. 

 § Stigma much incrassated. - - - Sph^eripalpus. 



§§ Stigma not incrassated. - - - Pachylarthrus. 



If Apical joint of the maxillary palpi not 



incrassated. 

 I Middle tibiae clavate. - - - Spaniopus. 



H Middle tibiae not clavate. 



§ Prothorax subquadrate. - - - Syntomopus. 



§§ Prothorax rounded in front. 

 X Antennae with long hairs, 

 o Antennae 12-jointed, with one ringlet ; 



club not jointed. - - - Arthrolysjs. 



oo Antennae 13-jointed, with two ringlets ; 



club with two joints. - - - Dichalysis. 



Antennae with no long hairs. 



Ulna as long as the humerus. - - Panstenon. 



Ulna shorter than the humerus. 

 Third abdominal segment covering all the 



following segments. - - - Cryptoprymna. 



Third abdominal segment not covering all 



the following segments. 

 Antennae 12-jointed. . - - Isocyrtus. 



Antennae 1 3-jointed. 



Fifth joint of the antennae small. - - Micromelus. 



Fifth joint of the antennae of the usual 



size. 

 Stigma very large. - - - Lamprotatus. 



Stigma not large. 

 V Petiole very long. - - - Sphegigaster. 



VV Petiole not long. 

 > Abdomen compressed. - - - Toxeuma. 



> ►> Abdomen not compressed. 



■< Abdomen not half as broad as the thorax. - Tityros. 



<5 <i Abdomen about as broad as the thorax. 



X X 



A 

 AA 



