THE ENTOxMOLOGIST. 



NOS.13G&137.] DECEMBER, MDCCCLXXIV. [Price Is. 



Descriptions of Oak-galls. Translated from Dr. G. L. Mayr's 

 'Die Miltelenropaischen Eichengallen' by Mrs. Hubert 

 Herkomer nee Weise. 



19. CynipsLignicola. — This gall, Fig. 19. 



which is extremely abundant in 

 Austria and Hungary, is usually 

 developed from the axillary buds 

 of Quercus sessiliflora and Q. pe- 

 dunculata, and sometimes, although 

 less frequently, from terminal buds 

 also. It is generally rather larger 

 than a pea, measuring more than a 

 centimetre in diameter; but we 

 have occasionally met with speci- 

 mens no more than five millemetres 

 in diameter. It is of a spherical 

 form, and usually of a ferruginous- 

 red colour, less commonly brown- 

 yellow or blackish red-brown : it is 

 enclosed in a hoary encasement, 

 which, however, is wanting in some 

 parts, having been ruptured by the 

 enlargement of the gall. In other 

 specimens, especially larger ones, 

 portions only of this hoary encase- 

 ment remain at the base of the gall, 

 in which case certain markings, 

 usually concealed beneath the mar- 

 gin of the encasement, become visible. The interior of the 

 gall consists of a tolerably hard, ru>t-coloured substance or 

 VOL. vir. 2 m 



Cynips Lignicola. 



