40 PROCEEbiNGS OF THE NA flONA L MUSEUM. vol. xxm. 



7. Metathorax strongly striate, with two transverse carinse, the spiracles elongate; 



wings black or dark fuscous, the areolet large, with parallel sides; 

 antennie in female broadened and compressed Ix'tween the middle 

 and apex (male) (see p. 39) . . (250) Joppoccras Ashmead, new genus. 



(Type, Crypius (hibiosam Cresson.) 



Metathorax not striate, but with two transverse carina^, the spiracles elongate; 



wings mostly hyaline, the areolet large pentagonal, the sides 



slightly con\ergent above; antenme filiform. 



(252) Linocerna Taschenberg = Osprijucholus Kriechbaumer nee Spinola. 



(Type, Cryptus macrobates Gravenhorst. ) 

 Metathorax rounded off posteriorly, with only one transverse carina — the basal 

 carina, the sj^iracles large, elongate; wings black, brown, or fuscous, 

 never hyaline, the areolet large i)entagonal, with parallel sides. 



(253) Joppkllnia Walsh. 

 (Type, Jop2)idium raficcjiH AValsh. ) 



8. Second joint of maxillary palpi normal, never much dilated; antenn;ein female 



usually filiform, setaceous, or flagelliform 9 



Second joint of maxillary palpi abnormal, much dilated, or triangular; antennae 

 in female thickened medially, ringed with white in both sexes; meta- 

 thorax coarsely rugose, the upper hind angles toothed or subdentate, 

 the areola indicated but poorly defined, never distinct, the spiracles 

 long-oval ( 254 ) Megapledes Forster. 



9. Petiole of abdomen vol cylindrical throughout, ])ut dilated and usually bent or 



el])owed at apical third, where it is always more than twice wider 



than at base, or even thrice as wide, except in some males 12 



Petiole of a])domen slender, cylindrical, and nearly of a uniforni thickness 

 thrcjughout, or at the most only a little thicker at apex than at base, 

 never twice as wide; as seen from the side it is straight or nearly, 

 or at most slightly bent but never elbowed. 

 Metathorax vlththe apical transverse carina present, the spiracles elongate; 

 head rostriform, the malar space long. . . (255) Osprynchotus Spinola. 

 Metathorax ivlthout a transverse carina, or at most with only a l)asal trans- 

 verse carina, smooth, punctate, or transversely striate, especially 

 posteriorly, but sometimes with a smooth, semicircular or triangular 

 f;ha])ed space at 1)ase, tlie spiracles long linear 10 



10. Disc( i-cul lital nervure arcuate, not broken by a stump of a vein, the areolet varia- 



ble in size and shape 11 



Disco-cubital nervure Ijroken liy a stump of a vein, the areolet rather small, nar- 

 roweil above, the transverse medium nervure originating from 

 beyond the basal nervure; head sul)((uadrate, not rostriform, the 

 malar space normal . ( A frica. ) 



(256) Zuiio(ryptti)^ Ashmead, new genus. 

 {Cryptus sphinyh Aslimead, manuscript.) 



11. INIetanotum intJioul a l)asal transverse carina, not short. 



Areolet small, triangular, the submedian cell t^hurtn- than the median; 

 mesonotal furrows distinct, sharply defined, the middle lobe con- 

 vexly elevated; metathorax tran.sversely striate. (Africa.) 



(257) Melarhyssa Ashmead, new genus. 

 (Type, Metarlu/.tsa hifasiata Ashmead, manuscript. ) 



Areolet large, with the sides parallel, the submedian cell a little Iu)igcrihan 

 the median; niesonatal furrows distinct for two-thirds the length 

 of the mesonotum; metathorax smooth shining. (South America.) 



(258) Oplsoxestus Ashmead, new genus. 

 ( ()j>iKo.irKtus ferrughieus Ashmead, manuscript. ) 



