THE ENTOMOLOGIST. 



No. 150.] 



DECEMBER, MDCCCLXXV. 



[Price Od. 



Fm. .32. 



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

 'DieMitteleuropaischenEicliengallen' by E. A. Fitch, Esq. 



(Continued from p. 255.) 



32. Aphilothrix collaris. Hart. — This incon- 

 spicuous brown gall grows in the axils of the leaves 

 of Quercus sessiliflora. It is hard, smootli, spherical 

 or oval, and is, when mature, two to three milli- 

 metres long, and at the end generally more or less 

 conically pointed. In well-developed specimens 

 there lies directly underneath the cone a shallow, 

 zonal impression, which is frequently conspicuous 

 from its lighter or darker tinge. One half, or rather 

 more, of the gall is surrounded by the bud-scales. 

 Some specimens are pale yellow, and entirely, or 

 almost entirely, surrounded by the bud-scales, 

 only showing their blunt point: very likely these 

 are such as are inhabited by parasites. I do not 

 know whether the fly has been bred by anyone 

 except Hartig. Schenck states that the gall 

 remains in the bud after the fly escapes. It is, 

 however, doubtful whether this is always the case, ^_ ^_ collaeis 

 for Schenck only found the galls in small numbers, in situ. 

 and never bred the fly.— G^. L. Mmjr. ^'Sd^ma-ni*^ 



What I believe to be the gall of this species I ^g^i, '° 

 have found in Kensington Gardens, London, and c. A section 

 bred the gall-flies, but unfortunately lost them, cut through 

 Since being in Essex I am not satisfied about scales. 

 this and the preceding species. Synergus nervosus 

 and S. palliceps are its inquilines; and Kaltenbach gives 

 Eurytoma verticillata as its parasite. — E. A. Fitch. 



VOL. VIII. 



2p 



