BRITISH GALL-INSECTS. 11 



Produces the rows of red, bean-shaped, spongy galls on 

 Salix fragilis. The galls widely protrude on both sides of 

 the leaf. In the above paper of mine I have called this 

 species by its older name ^' Saliceti ;" it is, how^ever, better 

 known as '^Vallisnieri" of Hartig, under which name an 

 observation of mine on its oviposition under difficulties has 

 since appeared in the E. M. Mag. viii. p. 109. It bears a 

 whole string of names besides, \yhich need not be discussed 

 here. Bred. 



34. Nematiis pedimcidi, Hartig (Midler, E. M. Mag. vi. 



p. 184, economy). 

 Produces the globular hairy pea-galls on the underside of 

 the leaves of Salix cinerea. Bred. 



35. CryptGcamjms medullarius, Hartig (Degeer, ii. 2, 271 ; 



No. 24, tab. 39, fig. 1—11). 

 Sawflies, which I refer to this species, have been bred by 

 Mr. Frederic Moore, from medullary swellings on the young 

 twigs of stunted willows, occurring near the sea-shore at 

 Scarborough. 



36. Cryptocmnjms angiistiis, Hartig (Inchbald, E. M. Mag. 



i. p. 47, economy). 



CHALCIDID.E. 



If we are badly off in the Tentliredinidce, our knowledge 

 of the gall- producing ChalcididcB is worse still. The 

 economy of the genus Isosoma is very little known to me, 

 notwithstanding the praiseworthy efforts of Mr. Moncreafi' 

 and Mr. J. W. H. Traill to supply me with materials. I 

 therefore ask for help ; our grass- and stem-feeding Chalci- 

 diidcB should be better worked ; we are sadly behind the 

 work done by Walsh, in the United States, and Giraud, in 

 Austria. I do not mean as regards the perfect states, 

 because Islw F. Walker is among us, but as regards their 

 metamorphoses. 



