MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 27 



Abdomen not margined at sides, sessile or aiibsessilc. Anterior tibial spur 

 strongly forked; antenna' in 5 nsnaliy lO-ll-jointed, in <? 11-jointed; 

 front wings never with a post-marginal vein, the stigmal vein long, 

 the marginal often stigniated... ...Subfani. IV, Cekapiiioxin*. 



3. Front wings most fre(|uently with marginal and stigmal veins; antenna) 



in both sexes usually 12-jointed, in 9 sometimes 11-jointed, or 

 7-jointed when the claval joints coalesce.. .Snbfam. V, Scelionin.*;. 

 Front wings always without marginal and stigmal veins and nmst frequently 

 entirely veiiiless, at the most with only a clav.ate submarginal 

 Tein ; antenna' never more than 10-jointed, usually alike in both 

 sexes, rarely only 8- or 9-jointed Snbfam. VI, Pi.ATYtJASTKKiN.«. 



4. Front wings with the marginal vein linear, not stigniated 5 



Front wirigs with the marginal vein stigmated, the costal cell closed. 



Mandibles dentate; antennae ir)-jointed; claws pe<'tinate, 



Subfam. VI , Helorin^. 

 Mandibles edentate; antenna- IS-jointod, with a ring joint; claws simple, 



Suldaui. VIII, PUOCTOTRYPIN^. 



5. Front wings with a distinct basal ••ell and usually with a distinct mar- 



ginal cell (the latter rarely entirely wanting); hind wings 

 always with a basal cell; antennae 14 to 15 jointed; labial 



pal pi H-jointed Subfam. IX, BELYTiNiE. 



Front win;; with the brachial cell scddom distinct, the median nervnre 

 ln'ing usually obsolete, the marginal cell never complete, 

 usually entirely wanting; hind wings always without a cell; 

 antenuio 12-, 13-, or 14-jointed; labial palpi 2-joiuted, 



Subfam. X, Diapriin*. 



WINGLKSS FORMS. 



6. Abdomen acutely margined at sides 7 



Abdomen not margined at sides. 

 Fore femora much swollen. 

 Head oblong; antenna; 12-to 13-jointed in both sexes, inserted near the 



month Subfam. BETHYHNiE. 



Head transverse or globoee. 



Anterior feet normal; antenna' in 9 13-jointed Subfam. EMBOLEMiNiE. 



Anterior feet chelate ; antenna; in 9 10-jointed Subfam. DRYiNiNiE. 



Fore femora not much swollen. 



Mandibles edentate Subfam. Proctotrypin^. 



Mandibles dentate. 

 Antenna; inserted near the mouth. 



Anterior tibial spur 2-pronged Snbfam. Ceraphronin.*:. 



AntenniB inserted on a frontal prominence. 



Labial palpi 3-jointed Subfam. Belytin^. 



Labial palpi 2-joiutcd Subfam. Diapriin^. 



7. Antenna; lO-joint'^d; labial palpi l-jointed Subfam. Platygasterin^. 



Autenuie 12-joiut»'d or with a solid dub 7-jointed; labial palpi 2- or more, 



jointed Snbfam. Scelionin^. 



Subfamily I. P.ETHYLIN^E. 



Head oblong, hovi/outal, the occipital line complete. Ocelli often 

 absent; when present .5, triangularly arranged. Mandibles usually 

 large and broad, from 2- to G-dentate. Maxillary palpi 4- to 6 jointed; 

 labial palx)i -- to 3-joiuted. Antenna) not elbowed, tiliform or setaceous, 



