THE ENTOMOLOGIST. 



No. 133.] SEPTEMBER, MDCCCLXXIV. [Price 6d. 



Descriptions of Oak- cj alls. Translated from Dr. G. L. Mayr'a 

 'Die Miltelenropaischen Eichengallen' by Mrs. Hubert 

 Herkomer n^e Weise. 



Fig. 14. 



Teigonaspis megapteea. 



14. Trigonaspis megapiera. — 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 lime, the wasp already leaving it 

 in June. After this escape the gall shrivels np 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 Toryraidae. He states that 

 Callimome Erucarum, C. nobilis (= Roboris), and C. amcenus, 

 are parasites of Aphilothrix Hadicisj that C. nobilis is a 



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