26 PROCEEDINGS OF THE NATIONAL MUSEUM. voi.xxm. 



Eight genei-a are placed here, distinguished as follows: 



TAULK OF GEN'ERA. 



Fonrtli abdominal segment and the following not at all or only >«lightly compressed; 

 if nuich compressed, compressed from the secon<l segment, tlie incisions 



always distinctly visible 2 



Fourth abdominal segment and those following very strongly comjiressed, the 



incisions scarcely visible ( 104 ) Scleuciis Holmgren. 



(Type, SelrucK.s riiiu'iforiiuH Holmgren.) 



2. Tliird joint of tiagellnm strongly exi-ised ( 105 ) ZetlsluKi FiJrster. 



(Type, Zct iHinin riifijx's Fomier.) 

 Third joint of flagellum not excised. 



Areolet closed at apex, or, if open, the abdomen umcli lengthened 3 



Areolet open at apex, the abdomen rounded or oval; antenna^ IT-lS-jointed. 



(106) Xestophija F(')rster. 



(Ty))e, XexiojiJn/afdlld.c Forster. ) 



?). Second alxlominal segment in female from the base and beyond not nnich com- 



])ressed, the po.stpetiole not entirely smooth and shining 4 



Second abdominal segment from the base and all the following segments much 

 compressed from the sides, the petiole entirely smooth, shining, the 

 postpetiole scarcely wider than the petiole; second segment longer than 

 wide at apex; metanotum with the external and median lateral areas 



confluent ( 107) Asyncrita Forster. 



(Type, AtractodesJ'ureolatus Gravenhorst.) 



4. Antenna' in female 16-17-jointed, in male 19-23-jointed; i^ronotuni anteriorly 



uncovered ( 108 ) Stupnus ( rravenhorst. 



(Type, Sfllpnas gagates Gravenhorst. ) 

 Antennte in female more than 17-jointed; pronotum covered. 



Abdomen in female either lengthened or somewhat compressed from the 

 sides, the second segment more or less rounded laterally; areolet either 

 closed or open behind 5 



Abdomen in female compressed laterally, also not strongly lengthened, the 

 second segment laterally not rounded, much widened toward apex; 

 s^tiracles of the first and second segments in males and females not 

 really visible from above (109) PohjrJieiiitiio Fr)rster. 



5. Abdomen in female not conijjressed laterally, vitJt a distinct ventral fold; mid- 



dle vein in hind wings obliterated at base in both sexes; petiole and post- 

 l>etiole in male smooth, shining, and longer than tlie coxa' and trochan- 

 ters; second segment with thyridia; areolet open. 



(110) Exolytus H(.>lmgren. 



(Type, Mesoleptus Ixvigator Gravenhorst.) 



Abdomen in female much com])ressed laterally, without a ventral fold; nuddle 



vein in hind wings distinct in both sexes; petiole in male more or less 



coriaceous or rugulose, not longer than the coxa' and trochanters; areolet 



wanting or open ( HI ) Atrododes Gravenhorst. 



(Type, Atractodes hicolor Gravenhorst.) 



