THE ENTOMOLOGIST. 
No. 133.] SEPTEMBER, MDCCCLXXIV. [Price 6d. 
Descriptions of Oak-galls. Translated from Dr. G. L. Mayr’s 
‘Die Mitteleuropaischen Hichengallen’ by Mrs. HuBertr 
HERKOMER née WEISE. 
Fig. 14. 
TRIGONASPIS MEGAPTERA. 
14. Trigonaspis megaptera.—Only once, many years ago, 
I have found several specimens of this red, berry-like gall, 
growing between the cracks of the bark at the lower part of 
the stem of an old oak. It is spherical, of the size of a pea 
or smaller, red, very sappy, and contains a larva cell. This 
gall only lasts a very short time, the wasp already leaving it 
in June. After this escape the gall shrivels up and gets 
brown.—G. L. Mayr. 
The associates which live externally or internally with the 
house-holders of oak-galls are here briefly mentioned: they, 
and the house-holders, will be noticed more in detail else- 
where, with the help of Dr. Mayr’s progressive work on galls — 
and their in-dwellers. Of this work three chapters are 
published: one on oak-galls, another on Synergus and the 
allied genera, and another on the Torymide. He states that 
Callimome Erucarum, C. nobilis (= Roboris), and C.ameenus, 
are parasites of Aphilothrix Radicis; that C. nobilis is a 
VOL, VII. ie 
