86 GENERA OF HYMENOPTERA. 



Concerning our genera and fi|)ecie8 of this interesting family, con- 

 siderable has been written by Osten Sacken, Walsh, Bassett and 

 Ashniea<l, a list of whose publications will be given, in the Biblio- 

 graphical List, further on. 



Family EVANIID^. 



This family is eai»ily distinguished by the abdomen being attached 

 to the disk or near the ba.se of the metathorax, and not at the apex 

 as is the ca^ in the other families. The genera are readily separated 

 by the characters given in the folhnving table. The abdomen is 

 petiolate and more or less compressed in all the genera ; it is long, 

 sickle-shajied in Faims, subelliptic, when viewed laterally, in J ulaciis, 

 short, hatchet-shaped in Evania, and small, ovate in Hi/ptia, nuich 

 compressed and attached to the thorax by a rather long slender 

 petiole in the last two genera. 



The genus Pammegischia Prov. (which the writer has not seen) 

 seems to differ from Aulacus chiefly in the formation of the jx)sterior 

 coxae. 



Table of Genera. 



Anterior wings with two recurrent nervures; abdomen attached to the pyra- 

 niidially elevated middle of metathor.ix, almost elliptical in shape, sub- 

 compressed, about as long as head and thorax, ovipositor long ; three 

 submarginal cells, the dividing nervure between the second and third some- 

 times more or less incomplete, three complete discoidal cells; mesothorax 

 much elevated anteriorly, coarsely transversely rugose and usually promi- 

 nently trilobed ; head not narrowed behind the eyes which do not attain 

 base of mandibles; antennte inserted low down near base of clypens, about 

 on a line with lower margin of the rounded eyes, scape short, dilated ; pos- 

 terior legs long and slender, — Atilaclase. 



Posterior coxse as usual ; firet submarginal cell receiving the first recurrent 

 nervure at or near the tip Anlacnst Jur. 



Posterior coxse swollen, much elongated and prolonged within beyond inser- 

 tion of the trochanters; first submarginal cell receiving the first recurrent 



nervure towards the middle Panimegiscliia Prov. 



Anterior wings with only one recurrent nervure or none; antenme inserted high 

 up about opposite the middle of the oblong eyes, — Evaniinae. 



Abdomen attached to base of metathorax close to scutelUnn, long, sickle- 

 shajied, much longer than head and thorax, subclavate, gradually increas- 

 ing in width from its insertion, ovipositor long ; anterior wings with a long 

 marginal cell which almost reaches the ai)ex of the wing, two submarginal 

 cells, first unusually large, second open to apical margin, first discoidal cell 

 very small and narrow, second discoidal open beneath by a deflection of 

 the anal nervure, third discoidal open to apical margin of the wing ; head 

 elongiitc, depressed, extended and more or less narrowed behind the eyes 

 which attain the base of mandibles; scape short; mesothorax convex, 



