346 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



The following table iucludes all the genera at present known to me: 



TABLE OF GENERA. 



FEMALES. 



Aiitennse 14-jointe(l. ........ 7 



Anteuliiu 15-jointefl. 



Abdomen witli 7 oi* 8 dorsal segnielits ....3 



Abdoineu with 3 or 4 dorsal segments. 



Marginal vein as long as, or scarcely longer than, the marginal cell 2 



Marginal vein more than twice as long as the marginal cell. 



Macrohynnis Forster. 



2. First fiiiiiclar joint nearly as long as all the rest together, the intermediate joints 



transverse-moniliform Dipiioka Fih'ster. 



First luniclar joint not uunsnally lengthened. 

 Abdomen with 3, seldom with 4 dorsal segments, the second not greatlj' length- 

 ened, the third long and strongly compressed laterally ; marginal vein 

 not shorter than the marginal cell; autenuic tiliform, pubescent, the 



fnniclar joints all long Leptoriiaptus Forster. 



Abdomen with 3 segments, the second very much lengthened, almost reaching 

 to tip of abdomen, the third issuing from it like a short stylus; 

 marginal vein usually distinctly shorter than the marginal cell ; 

 antenuie filiform, pubescent, the 5 or 6 terminal joints oval, the 

 others long Miota Forster. 



3. Abdomen with 7 dorsal segments; antennm clavate-moniliform, the first fuuiclar 



joint slightly longer than the pedicel, all others to the last monili- 

 form, the last enlarged, oval; first abscissa of radius straight, or at 



least not very oblique ACROPIESTA Forster. 



Abdomen with 8 dorsal segments. 



Eyes bare 6 



Eyes hairy. 



Middle carina of metatliorax not divided ^ 4 



Middle carina of metathorax divided, or wanting Belyta .Turiue. 



4. Postscutellum with a strong thorn or spine Oxylabis Fiirst. 



Postscutellum without a thorn or spine. 



Third dorsal segment of abdomen not, or very little, longer than the fourth... 3 

 Third dorsal segment of abdomen much longer than the fourth. 



Mandibles short, small; marginal vein as long as marginal cell; antenuii} 

 filiform, pul)escent, the last fiagellar joint more than twice as 



long as thick Cinetus Jurine. 



Mandibles long, falcate; marginal vein shorter than the marginal cell; last 

 fnniclar joint not more than twice as long as thick. 



Xenotoma Forster. 



5. Marginal cell closed. 



First abscissa of radius straight from the margin, shorter than the marginal 

 A'ein: fnniclar joints only slightly shortened toward the tips of 

 antenn;e Zelotypa Forster. 



First abscissa of radius ol)li<iue, longer than the marginal vein; fuuiclar 

 joints strongly shortened toward the tips of antennje, much wider 



than long Pantoclis Forster. 



Marginal cell open. 



Stigmal and postmarginal veins much shortened, thestigmal given off at almost 

 a rijrht aiisile Z ygota Forster. 



