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XXVI. Descriptions of some new Species of exotic Hyme- 

 noptera belonging to Evania and the allied Genera, being 

 a Supplement to a Memoir on those Insects published in 

 the Third Volume of the Transactions of the Entomolo- 

 gical Society. By J. O. Westwood, Esq., F.L.S. 



[Read June 2nd, 1851.] 



Since the publication of the Memoir above referred to, various 

 new species of the genera there described having come to my 

 hands, and others having been described by recent authors, I 

 have thought it might be considered useful to publish these addi- 

 tions by way of supplement to my Memoir; more especially as 

 several of the species now described possess characters of con- 

 siderable interest, and the synonymy of some of the species con- 

 tained in my former Memoir requires further observation. 



Genus Evania. 

 Evania appendigaster, Linn. ; et laevigata, Oliv. Westw. Trans. 

 Ent. Soc. vol. iii. p. 241. 

 Admitting the distinction between these two species (although 

 adopting the nomenclature of the Marquis Spinola relative to the 

 former species), M. Guerin-Meneville (Revue Zoologique, 1843, 

 p. 334,) states, that, having examined many individuals of E. Icevi- 

 gata, he invariably found the radial cell to be triangular, whilst 

 in E. appendigaster it is semi-oval, as described by Latreille, and 

 figured by Jurine, pi. 2, ord. 2, gen. 1, and pi. 7. In E. appen- 

 digaster, moreover, the head is more convex in front, and the 

 antennae are inserted much lower in the face, nearly level with 

 the lower extremity of the eyes, whence their scapes are longer. 

 In E. Icevigata the front of the head is much less prominent, and 

 the antennas are inserted on a line running between the eyes, 

 scarcely below their middle. 



Evania fuscipes, Nees von Esenb., Illig., Westw. Trans. Ent. 

 Soc. vol. iii. p. 241. 

 M. Guerin-Meneville introduces this insect as the female of E. 

 appendigaster. 



