290 ICUNEUMONIDyi;. 



About half the Palsearctic genera are now recordetl from India, 

 including two erroneously supposed to be new by Cameron, who 

 has further erected two which appear to me to be valid (though 

 one of them 1 have not seen), and these, together with one herein 

 brought forward, give us a total oi' eight from the Oriental Eegion. 

 This comparatively large number may perhaps be accounted for by 

 the fjict that these insects attack, so far as we know at present, 

 ].e idoptera and not Tentheedintm:. 



2\ihle of Genera. 



1 (16) riagellum iiliform, its basal joint 



elongate. 



2 (13) Antennae distinctly shorter than 



body; fla<zellar joints cylindriciil. 



3 (6) Scuteilum laterally margined ; meta- 



thoracic spiracles sublinear. 



4 (5) Metanotum not areated; head pos- 



teriorly broad Aithris, Cam., p. 290. 



5 (4) Metanotum fully areated ; head [p. 292. 



posteriorly very narrow Xanthexochus, gen. n., 



6 (2) Scuteilum without a lateral margin ; 



metathoracic spiracles oval or cir- 

 cular. 



7 (10) Areolet wanting. 



8 (9) Basal metathoracic area not dis- 



crete from areola Exochus, Grav., p. 293. 



9 (8) Basal area discrete from areola .... Polyclistus, Forst., 



10 (7) Areolet present. [p. 298. 



11 (12) Basal segment of abdomen elongate 



and discally bicarinate Triclistus, Furst.,p. 300. 



12 (11) Basal segment c[uadrate and discally [p. 304. 



smooth Megatrema, Cam., 



13 (3) AuteunsB as long as body, or flagellar 



joints denticulate. 



14 (15) Metanotum subglabrous, with all [p. 30."). 



arepe obsolete Colpotrochia, Holmg., 



15 (14) Metanotum rugulose, with complete [p. 308. 



arese Hyperacmus, Holmg., 



16 (1) riagellum setiform, its basal joint [p. 310. 



transverse Seticornuta, gen. n., 



Genus AITHRIS, Cavi. 

 Aithris, Cameron, Manch. Mem. 1900, p. 106. 



Genotype, A. corniitus, Cam. 



Head buccate and broad behind the large, emarginate and not 

 apically convergent eyes ; cheeks short, labrum not exserted, 

 clypeus not discrete, mandibles stoutly bidentate ; occiput im- 

 marginate, frons apically prominent; vertex deH[)ly impressed 

 centrally, ocelli large. Flagellum with tlie two basal joints of 

 equal length. Mesopleura) centrally prominent and basally 



