THE ENTOMOLOGIST. 



No. 135.] 



NOVEMBER, MDCCCLXXIV. 



[Pbioe 6d. 



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

 ' Die Mitteleiiropaischen Eicliengalleu' by Mrs. Hubert 

 Herkomer nee Weise. 



18. Ci/nips Kollari.— The Fig. 18. 



gall of this species appears 

 on the oaks in the same way 

 as that of Cynips tinctovia, 

 from wliich, in many in- 

 stances, it cannot easily be 

 distinguished. It is perfectly 

 spherical, from twelve to 

 twenty-three millemetres in 

 diameter, of a brownish 

 yellow colour, — rarely of 

 a brownish red-yellow, — 

 naked, smooth, and often 

 without any unevennesses, 

 but it has sometimes such 

 isolated and minute warts as 

 occur on the gall of Cynips 

 tinctoria. The section ex- 

 hibits a brownish yellow 

 reticulation, consisting of 

 thin-walled parenchyma and 

 parenchyma-cells,so that the 

 gall may be easily cut with 

 a knife. No proper inner- 

 gall, like that of Cynips 

 tinctoria, is to be found, 



although the gall-substance surrounding the oval larva-cell 

 in the centre of the gall is harder, and has a radiate-striated 



VOL. VII. 2 I 



Cynips Kollaei (and in section). 



