226 THE CANADIAN ENTOMOLOGIST. 



5. Apical margin of third abdominal segment not finely denticulate, 



entire, notched, or terminating in from one to seven teeth.. ..6. 

 Apical margin of third abdominal segment finely denticulate or with 

 many teeth. 



Front wings with an incomplete marginal cell. 



Mesopleura bispinose (5) Euchrceus, Latreille. 



(Type Chrysis purpurata, Fabr.) 



Mesopleura normal, unarmed Spinola, Dahlbom. 



Front wings with a complete marginal cell. 

 Apex of abdomen with 1 r small 



teeth (6) Polydontus, Radoszkowski. 



(Type P. Stschurovskyi, Radosz.) 



6. Apex of abdomen not terminating in a tooth, entire, undulate, notched 



or angulate . . . : 7. 



Apex of abdomen terminating in from one to seven teeth. 



Apical margin of third abdominal segment terminating in 7 



teeth • • (7) Heptachrysis, Mocsary. 



(Type Chrysis festina, Smith.) 

 Apical margin of third abdominal segment terminating in 6 



teeth (S) Chrysis, Linne. 



( = Hexachrysis, Licht.) 

 (Type Chrysis ignita, Linne.) 



Apical margin of third abdominal segment terminating in 5 



teeth (9) Pentachrvsis, Lichtenstein. 



(Type Chrysis amoena, Eversm.) 

 Apical margin of third abdominal segment terminating in 4 



teeth (10) Tetrachrysis, Lichtenstein. 



(Type Chrysis aeruyinosa, Dahlb.) 



Apical margin of third abdominal segment terminating in 3 



teeth '. (11) Trichrysis, Lichtenstein. 



(Type Chrysis cyanea, L.) 



Apical margin of third abdominal segment terminating in 2 

 teeth (12) Dichrysis, Lichtenstein. 



Apical margin of third abdominal segment terminating in a 



single central tooth (13) Monochrysis, Lichtenstein. 



(Type Chrysis hybrida, Lepel.) 



