MONOfJUAPH or THE NORTH AMERTOAN PROfTOTRYPlD^. 347 



Stigmiil iin<l poHtiiiai'Kinul veinrt miicli nhort«^no<l, thostiKiiialKiveti ofFnt a Tory 

 <>lilii|ue iin^le; aiiteiiiiio clavato, inoiiilit'orin, tlio tirHt fiiuiclar Joint 

 obly a littlu louger tliau thick and much HiuuUer than tho jiedicel. 



AcLisTA ForHt«^r. 



Stif^al vein very short, with an nncns, mari^inal vein as long as the basal 

 nervure, niunilihlcH couica], not rostriforui; siape at tip produced 

 intoa littlo Hpinc; ])alpi4-j<>inted Synacra Korster. 



6. Mesonotnm with 2 fiirrowH; marginal cell long, open; antennae clavate-nionili- 



form, the lirst funiclur joint slightly longer than the peilicel 



PSILOMMA Font. 

 Mesonotnm without furrows ISMARUS Hal. 



7. Ocelli wanting; winglosM Anommath'M Furster. 



Ocelli present. 



Marginal cell distinct, closed; antennsc tiliform or Huhclavate. 



Anectata Forster. 

 Marginal cull scarcely diHcerniblo or wanting; autcunic Hubclavatc-nioniliform^ 

 ptibescent, the first fiiniclar joint smaller than the pedicel. 



Pantolyta Forst. 



MALKH. 



Petiole of abdomen not, or scarcely, longer than the Uiotathorax 9 



Petiole of abdomen almost twice as Umg a^ the mctathorax. 



Marginal vein twice as long as tho marginal cell Macroiivnnis Forst. 



Marginal vein much larger than the stigmal and about as long as the marginal 

 cell. 

 Second abdominal segment compressed laterally; jtetiole smooth above. 

 Antennai filiform, the scape as long as the lirst funiclar joint, the latter 



strongly emarginated at base Lept< itiiAPTUs Fiirst. 



Autennse filiform, pubescent, the scape not as long as the first funiclar 



joint, the latter slightly emarginated at base Miota Forst. 



Becond abdominal segment not compressed laterally, tho abdomen becoming 

 more flattened behind the segment; the petiole above more or less 

 furrowed; scape longer than the first funiclar joint. 



CiXBTUs Jnrine. 



Marginal vein as long as, or a little longer than, tho stigmal, but much shortt^r 



than the marginal cell ; mandibles falcate Xexotoma Forst. 



2. Middle carina of nietathorax not divided 3 



Middle carina of metathorax divided or absent. 



Marginal vein scarcely longer than the stigmal, marginal cell long, postmarginal 

 vein greatly lengthened; antenme filiform, all the joints long, cylin- 

 dric, tho first funiclar joint emarginate at base Bklyta .Jnrine 



3. Postscntellum with a strong spine Oxylabis Forster. 



Postscntellum without a spine. 



Eyes not hairy 4 



Eyes hairy. 

 Marginal cell closed. 



Scape with the apical margin on one side produced into a tooth, 



AcROPiESTA P'orst. 

 Scape not produced on one side into a tooth. 

 Marginal vein not or scarcely longer than the first abscissa of radius, the 

 latter oblique. 

 Last ventral segment very straight and punctured. 



Anterior tibise normal Ankctata Forst. 



Anterior tibise bent, with a median spined process Zygota Forst. 



Last ventral segment somewhat bent, not punctured.. Pantoclis Forst. 



