10 (;i:ni:ka of iiYMi:NorTi;iiA. 



Table of Families. 



Posterior trothantors 2-jointed* ~- 



Posterior troehauters 1 -jointed 11- 



2. — Ali(l(iiiu-ii conniite. united to tlie tlxmix by the entire diameter (if the l)asiil 



jKirt, tlie articulation not niovahle 3. 



Al>donien sessile or petiolate, united to the thorax hy a portion only of its 



tninsvcrsi- <lianieter, the articulation movable. — Parasitica... 4. 



3.— Anterior tildie with two ai)ical s])urs: al)donien of 9 liniiished at tip with 



a pair of saws.— Phyllophaga TENTHREDINID^. 



Anterior til)i:c with one apical spur; abdoinen of 9 furnished at ti|i willi a 



borer. -Xylophaga UROCERID^. 



4. — Anterior wings with several closed cells, or at least a elo.sed or nearly closed 

 mar;;inal or submarfiinal cell, very rarely without, as in some Evaniida; 



and Hraeonidie 5- 



Anterior wings almo.st veinless, without closed or perfect cells; very rarely 

 with a tdosed marginal or submarginal cell, as in some genera of Procto- 



trui)ida' 10. 



5. — Anterior wings with a costal nervure and a more or less developed .stigma.G. 

 .\nterior wings without a ccstal nervure and stigma; abdomen generally 



ovate and more or less compressed CYNIPID^. 



6.— Abdomen inserted upon the dorsum or near the base of the metat borax. 



EVANIID^. 



.\bdomen attached to the extremity of the metathorax 7. 



7. — .\nterior wings with two recurrent nervures. very rarely with but one.. ..8. 



Anterior wings with but one recurrent nervure, very rarely without 9. 



8. — (.'(j.stal and subcostal nervures sejiarate and distinct, the costal cell therefore 

 l)resent; first sul)niarginal and tirst discoidal cells separate anil distinct. 



TRIGONALID^. 

 Costal and subcostal nervures confluent, the costal cell therefore absent; 

 first submarginal and first discoidal cells always confluent. 



ICHNEUMONID^. 

 9. — C'o.stal and subco.stal nervures separate and distinct, the costal cell therefore 



I)resent; head globose, vertex tuberculate and rugose STEPHANID^. 



Costal and subcostal nervures confluent, the costal cell therefore absent. 



BRACONID^. 

 10.— I'osterior margin of prothorax not reaching thetegnhe; ovii)ositoi- issuing 



before the apex of the al)domen CHALCIDID^. 



Posterior margin of prothorax reaching the teguhe ; ovipositor issuing fioni 

 the apex of the abdomen PBOCTOTRUPID^. 



* In adopting tiiis character (which is not altogether a sati.sfactory one, being 

 often ditlicult to distinguish) the compiler ha.s followed after Hartig, Taschen- 

 berg, AikIic, etc.. without making an examination of the Cyniiddie, Chalcididic 

 and Proctotrujiidje. in wliicli families excei)tions will doul)tless l)e found to occur ; 

 these families, however, are readily distinguished from those placed in the next 

 division, by tluir generally very small size and the fewness of the wing nervures ; 

 the I'elecinidie and Chrysididie, whicli also have imperfect nenration, are so well 

 characterized that they cannot be confounded with anything else. In I lie other 

 families of this division the posterior trochanters are distinctly 'i-jointed. 



