•A GENERA OF HYMEXOPTERA. 



The arraiitrenient iriven below is that |)ru])()S(Ml liy the Rev. T. A. 

 Maivliall in his admirable and exhau.stive " Monojiraph of British 

 Rraconida^" the first ])art of whicli has been ]nil)lished in the " Trans- 

 actions of the Entoniolouical tSoeiety of London" for IH.So, and in- 

 eludes the first three divisions. For a suniniarv of the distinj^nishinj: 

 characters of the genera belonuing to the reniainiuii- divisions, the 

 compiler is indebted to the courtesy of Mi-. Marshall, who very 

 kindly contributed an abstract from his un})ublishe(l MS. 



Our species of this interesting family have been very little studied, 

 as will he seen by the small nuniliei- of unstarred genera in the fol- 

 lowing tables. The undescrihed material in the coUecticm of the 

 American Entomological Society is large, and contains representa- 

 tives of many genera characterized below, and of which no species 

 have yet been described as occurring within oui- fauna. 



The family is divided into six divisions in the following manner : 



Table of Divisions. 



Articulation between second anil third abdominal segments (suturiforni aiticul:i- 

 tiiiii) riijid, connate. 

 Mandibles in the usual jiosition, toueliiiijr or crossinjj; at the tips. 



Clypeus emarginate, forming with the mandibles a semicircular opening. 



cy(;lostomi. 



Clypeus not .so eniarginate, fitting clo.sely to the mandibles. 



Abdomen above withdut sutures, segnuMits l-:> forming a solid shield, or 



wilh two suiierficial sutures at most, but still exartieulate. 



CKYl'TOdASTKKS. 

 Abdomi Ml showing tlu' usual sutures. 



Second submarginal cell minute, often imperfoct ARE()L.\RII. 



Second submarginal eel! large. 4-aJigular or wanting.. ..POLY^IORPHI. 



Mandibles with their tijts turiu'd outwards, not in contact EX()1)(»XTES. 



.\rticulation between second and third abdominal segnu'iits, as well as the dthers. 



flexible, allowing the abdouu'U to be cuived umler the thorax. 



FLEXI LI VENTRES. 



Table of Subfamilies. 



Div. I.-CVt'L<)8T()Ml. 



Occiput not margined, or only faintly so at the sides 2. 



Occijjut margined, distinct from the vertex 3. 



2.— Transverse medial nervure uniting or interstitial witli the basal nervure, the 

 median and sul)me(lian cells therefore of .sanu' length on the externo- 



uiedial nervure Braconinse. 



Trau.sverse medial nervure received by the first di.scoidal cell, the imdiaii 

 cell therefore shorter than the sul)median cell on (he externo-mediai 

 nervure Exothecinse. 



.'{. Abdomen petiolate ...Spathiinse. 



.Midomeu sessile or subsessile 1. 



