250 Miscellaneous. 



the five digits feebly indicated and clawless. A short conical- 

 pointed tail projects between them. The elongate, flattened, nata- 

 tory tail of the adult is a later development. There is no trace of 

 navel. The skin of the trunk is uniformly smooth and nude. 



If this embryo should be a male, the spur of the femoral gland 

 is a defensive organ of later growth. 



The author refrains from dissection iu hopes of receiving another 

 specimen ; and, after a detailed description of the external characters 

 of the unique specimen, refers to his paper " On the Uterine Ovum 

 of the Oniithorliynclms " in the volume of the ' Philosophical 

 Transactions ' for 1834, and on the " Mammary Glands '" in the 

 volume for 1S32. — Proc. Royal Soc. vo]. xlii. no. 256, p. 391. 



Aulax hypochseridis, a new Gall-fiy. By J. J. Kieffek. 



Hypoclioeris radicata, L., frequently bears elongated or fusiform, 

 or sometimes rounded swellings of the stem, which may attain a 

 length of over an inch and a half and a width of over a quarter of 

 an inch. They have the outer surface smooth and of the same 

 colour and texture as the stem of the plant ; internally they are 

 spongy, white, with ten or twelve round or oval, pretty regularly 

 arranged cavities, about one twelfth inch apart, within each of which 

 a larva resides. They are therefore very like the galls of Aulax 

 hieracii, Bouch., which occLir frequently upon species ol Hieracium ; 

 but the latter are always stouter, and their cells are larger and 

 placed closer together, and form more than one row. These swel- 

 lings usually occur below the forked branching of the stem ; the 

 shoot above them is sometimes normally developed, sometimes 

 aborted. They are found as early as the beginning of June (in 

 Austria), but are not mature until the autumn. 



These galls have been obtained by the author in the neighbour- 

 hood of Bitscli, but they were first observed near Kaphas by Prof. 

 Licopoli (' Legalle della flora di alcune province Napolitane,' Naples, 

 1877). Dr. Vice found them in North Wales, according to Trail 

 (' Scottish Naturalist,' vol. iv. p. 16), and they were referred to by 

 Dr. F. Low in his " Bemerkungen liber Cjnipiden " (in Verhandl. 

 zool.-bot. Gesellsch. in Wien, 1884, p. 326) ; Low received speci- 

 mens from Prof. Licopoli, and bred from them two females of the 

 Chalcidian Eurytoma cynipsea^ Boh. 



From his specimens the author bred true gall-flies which he re- 

 gards as forming a new species of the genus Aidax ; they emerged 

 in the spring (probably in May) ; in a heated room as early as 

 February. 



The species is named Aida.v hypoclueridis by the author, who 

 describes the female, the only sex known, as follows : — " Body black. 

 Antennae filiform, with fourteen distinctly separated joints, dull 

 black, with adpressed grey hairs ; third joint somewhat longer than 

 the fourth, both longer than the following ones, which are cylindri- 

 cal, and about twice as long as broad ; apical joint pointed. Face 



