808 Prof. Westwood on the supposed ahnormal 



been taken amongst grass beneath trees, the only novel 

 remark on the economy of the species being that Mr. 

 Davies had obtained an individual of the genus Deca- 

 toiiKi from an oak-gall. In the second volume of the 

 same magazine Mr. Walker adds descriptions of one 

 additional species of Isosoma, one of Systole, five of 

 Eurytoma (one of which, E. salicis, was reared by M. 

 F. de Laporte from galls on willows near Paris), and two 

 of Decatoma. And in the fourth volume of the same 

 work three additional species of Isosoma, one Eurijtoma, 

 and three of Decatoma were described by Mr. Walker, 

 with no account of the economy of any of the species. 



C. G. Nees ab Esenbeck, in the second volume of 

 his ' Hymenopterorum Ichneumonibus aftinium Mono- 

 graphic,' 1834, has described eight species of Eurytoma, 

 with the general observation: — "Habitat in Carduis, 

 Artemisiis aliisque herbis et fruticibus, ubi gallas 

 fungosas ictu suo gignere dicuntur hujus generis species. 

 Adnot. Latreillium et Dalmanum secutus Eurytomce 

 genus inter Pteromalinos posui, quibus re vera habitu 

 notisque ex antennis alisque haustis proxime conjunctum 

 videtur ; sed vitae ratio Cyniphum potius est, quibus 

 Eucharide genere medio conciliatur, neque errabit, qui, 

 utriusque ordinis, Cyniphum et Pteromalinorum inquam, 

 novo certiorique charactere invento, Eurytomas Cyniphi- 

 bus restituet" {op.cit., pp. 38 & 39). 



The following are the species of which the economy is 

 recorded by this author : — 



Eurytoma plumata, Illiger {serratulce, Fab. ; ? , com- 

 pressa, Fab.; adonidunt, Eossi). "Habitat in galla 

 lignea polythalama, rotundata, utrinque attenuata, caulis 

 Serratulce arve^isis gallise (Fabricius, auctoritate Musei 

 Bosciani"* (p. 40). 



E. Ahrotani, Illig., Panz. (P. appendigaster, Swederus ; 

 ? , aterrwms, Schrank ; P. nigrltus, Swederus). " In Galla 

 caulis cujusdam tuberosa, plantse ab hieme destructse 

 ideoque incertae, Parietariae forte, copiam feminarum 

 invenit Schrankius. In Carduis proper Sickershausen 

 Julio, Augusto et Septembre mensibus, ipse legi ; marem 

 foemina3 copula junctum die 21 Aug. a. 1821 ; in variis 



* According to Bouclie, Naturg. d. Ins. i., p. 166, n. 58, the larva 



is " elongato-cyliudrica, subtiliter undulata, incisuris profundis seg- 

 mentis dorsalibus gibbosulis, capite subgloboso. Long. lin. 1. 

 Habitat in larvis Microfjasteris liparidi.^, Bonche, et in iisdem 

 metamorpliosiu subit." 



