MACBOGASTER. 25 



he had considered Macrogaster to belong to the PIMPLIN^E and 

 Hemigaster as intermediate between the CmpTlNJE and ICHNEU- 

 HoiUN,*;, in which latter he had then unhesitatingly placed 

 Clireusa, proposing for it and lioilmeyia a new group, termed by 

 him RoTKNEYiNjE. Subsequent svstematists have allowed Clireusa 

 to remain in the JOPPIDES and placed the remaining genera, as a 

 group apart, in the CKYPTINJE. Artliula, however, has the abdo- 

 men subimpressed, as in the PIMPLIN^E ; Macrogaster has the 

 petiolar spiracles before the centre of the segment and is com- 

 pared by Cameron throughout with Pimpla (cf., however, Ann. 

 Nat. Hist. xx. 1907, p. 17) ; and the neuration is identical in 

 Hemig aster, whose facies in other respects is certainly strongly 

 Cryptid. I consider them very naturally placed as a Cryptoid 

 group of the PIMPLIN^;, immediately preceding the equally 

 puzzling XOEIDIDES. JS T one of the Oriental species appears to 

 have been yet bred. 



Table of Genera. 



1 (4) Central mesonotal lobe triangular, 



apicallv truncate ; front claws 

 bifid. " 



2 (3) Metanotal arese not entirely want- 



ing ; petiolar spiracles beyond 



centre MACROGASTER, Brul., p. 25. 



3 (2) Metanotal areee wanting; petiolar 



spiracles central CHUEUSA, Cam., p. 31. 



4 (1) Central inesonotal lobe not triangu- 



lar, apicallv rounded ; front claws 

 simple. 



6 (6) Metanotum with arose ; postpetiole 

 dilated ; metatarsi not longer than 

 the following joints HEMIGASTER, Brul., p. 34. 



<3 (5) Metanotum with no areae ; post- 

 petiole not dilated ; metatarsi 

 longer than the following joints . ARTHULA, Cam., p. 37. 



Genus MACKOGASTER,* Brul. 



Macrogaster, Brulle, Hist, Nat. Ins. Hym. iv, 1846, p. 184. 

 Ctenotoma, Cameron, Ann. Nat., Hist, xx, 1907, p. 17. 



GEXOTYPE, M. rufipennis, Brulle. 



Head large and not much dilated behind the large eyes, cheeks 



* The generic name, Macrogaster, was applied to Coleoptera in 1805 by 

 Thunberg, and to Arachnida in 1843 by Miesch. It is consequently probable 

 that the Hymenopterous genus will have ere long to be renamed ; but I am 

 not aware that either of the earlier genera are in use by systematists and 

 prei'er to retain names until their alteration becomes of some use, which does 

 not appear to be the case here. Brulle's title is retained by Dalla Torre in 

 1901 and Ashinead in 1900. Macrogaster was also applied to a genus of 

 Zetizerid moths by Duponchel (cf. Doubleday's List and Newman's British 

 Moths, p. 17, etc.). 



