DESCRIPTIONS OF OAK-GALLS. 



87 



garden. At present the outside of the bud is still fresh, and 

 as the contents of the eggs showed indications of the larval 

 presence more than a n)onlh ago, I hope that they have 

 progressed so far as to give a prospect of some information as 

 to the effects of larval action on the under-ground bark clearly 

 distinct from those of oviposilion. 



Dunster Lodge, near Islewortli, 

 January "24, 1878. 



DESCRIPTIONS OF OAK-GALLS. 



Translated from Dr. (r. L. Mayr"s ' Die Mitteleuropiiisnlien Eiolieuyallen.' 



By Edward A. Fitch. 



(Continued from p. 9'^.) 



Fig. 81. — (ialls of Andrlcus rcDiiuU. and a double gall in section. 



8L Andricus rnmuli, Linne (^ Teras amentorum, Harl.). 

 — This really small, but almost always compound, gall may 

 be found in May on the catkins of Querciis pedtwculata or 

 Q. sessili/lora, but particularly on Q. pubescens. Attached to 

 the catkins we often see nut-sized or smaller woolly masses, 

 which have altogether the appearance of white or brownish 

 yellow cotton-wool rolled together in a ball. If we unroll 

 such a ball it falls into several smaller balls, each of which 

 belongs to a single catkin flower. These smaller balls 

 contain a hard uneven lump in the interior, which is about 

 the size and shape of a millet-seed, hard and brown. Ten to 

 twenty of these grow together on a deformed stalk. Each of 

 these small galls is hard, contains a larva-cell, and is covered 

 with numerous very long hairs, originally sappy, but soon 

 drying : these are malted together and twisted in the same 



