NORTH AMEKICAN HYMKNOPTERA. 1(( 



Marginal vein twice as long as radial cell. 



Genus ^lacruhyiinis Foerster. 

 Marginal vein not twice as long as radial cell. 



Marginal vein as long as, or a little longer than stigmal, but much 



shorter than the radial cell Genus Xciiotoiiia Foerster. 



Marginal vein much longer than stigmal, about as long as radial 

 cell. 

 Second abdominal segment laterally conipressed, pear-shaped ; 

 petiole smooth above; scape as long as first funicle joint. 



Genus L<e|»torhaptu$« Foer.ster. 

 Second abdominal segment not laterally compressed ; abdomen 

 •becoming flatter behind this segment ; petiole above more or 

 less furrowed; scape longer than first funicle joint. 



"•■■ Genus CiuetllS Jurine. 

 Female. 



Eyes naked. 



Mesoscutum without furrows Genus l!i»niarus Haliday. 



Mesoscutura with furrows Genus Psiloiuiiia Foerster. 



Eyes hairy. 



Antennje 12-jointed Genus Syiiacra Foerster. 



Antennse more than 12-jointed. 

 Antennie 14-joiuted. 



Ocelli wanting Genus Aiioiiiinatiiini Foerster. 



Ocelli present. 



Eadial cell scarcely visible Genus Pantolyta Foerster. 



Eadial cell ])lain Genus Anectata Foerster. 



Antennse lo-jointed. 



Metascutellum with a strong thorn Genus Oxylabis Foerster. 



Metascutelluni without a thorn. 



First funicle joint almost as long as all the re.st together. 



Genus Diphora Foerster. 

 Fir.st funicle joint much shorter than all the rest together. 



Middle carina of metanotum divided ; (radial cell open or closed). 



t Genus Belyta Jurine. 

 Middle carina of metanotum not divided. 

 Third dorsal segment of abdomen much longer than fourth. 

 Marginal vein as long as radial cell ; last funicle joint more 

 than double as long as broad. 



■••■ Genus Cinetns Jurine. 

 Marginal vein much shorter than radial cell ; last funicle joint 

 not more than double as long as broad. 



Genus Xenotonia Foerster. 

 Third dorsal segment not, or not much longer than fourth. 

 Abdomen with eight dorsal segments. 

 Eadial cell closed. 



Funicle joints only slightly shortened towards the end. 



Genus Zelotypa Foerster. 

 Funicle joints strongly shortened towards the end. 



Genus Paiitoclis Foerster. 

 Eadial cell open. 



TRANS. AMER. ENT. SOC. XIII. (23) AUGUST, 1886. 



