Bibliographical Notices. 305 
Copenhagen, Berlin, and Stuttgardt, he has been enabled to present 
an exceedingly full account of the anatomy of these hitherto little- 
known animals, in which very many new facts will be found, but 
which space forbids us to extract. The diagnoses are all in Latin, 
as well as the explanation of the plates (nine in number), containing 
anatomical details. 
M. Strém’s papers on Danish Lepidoptera (iii. pp. 1 & 107; iv. 
p- 381) contain several observations of more than merely faunistic 
interest, of which we can only find room for one. He points out 
a gradual degradation, as it were, in the females of Orgyia antiqua, 
gonostigma, and Eric, corresponding to peculiarities in their deve- 
lopment, the antenne being dentated in the first, crenulated in the 
second, but much shorter and merely filiform in the third ; the rudi- 
mentary wings are closely covered with hair in the first, sparsely 
haired in the second, exceedingly small and naked in the third; 
and the legs show a similar gradation. Accordingly he has found 
that the female of O. antiqua entirely disengages herself from the 
double cocoon, and places her eggs on the outside of it ; whilst that 
of O. gonostigma only perforates the inner cocoon, and remains hid- 
den behind the outer cocoon, which forms a sort of curtain, leaving 
a sufficiently large opening to admit the male; and the female of 
O. Erice, finally, never leaves the pupa-skin, just as is the case with 
some species of Psyche. Probably, in order to facilitate the fecunda- 
tion, the pupa is placed in an inverted position in the cocoon, which 
is found in the tops of the heath. 
The Record of Zoological Literature, 1866. VolumeIIT. Edited by 
Apert C. L. G. Giwrner, M.A., M.D., Ph.D., F.R.S. &. Van 
Voorst, 1867. 
In consequence of the illness of one of the Recorders, the volume of 
‘The Zoological Record ’ for the literature of 1866 was published at 
a later period than usual. “An undertaking of this kind,” it is 
observed in the preface, “‘ must, of necessity, be occasionally exposed 
to the danger of such a delay without the Editor having it in his 
power to guard against it.” 
Each year that this work comes to us we feel more and more its 
extreme usefulness. Without some such help as that afforded by 
this volume it is impossible for the zoological student to keep up with 
the literature of the day. The number of investigators in every branch 
of natural history is year by year increasing: the works published, 
in all languages, multiply in like proportion ; many of them are ex- 
tremely difficult to procure through a bookseller, and not to be found 
in our best public libraries ; and periodicals devoted to natural history 
in general or to some particular class, and Transactions and Proceed- 
ings recording the investigations of the members of the rapidly in- 
creasing number of scientific societies, render the attempt of the 
individual worker to keep himself acquainted with all that is being 
written almost hopeless. Here, then, the ‘ Zoological Record’ comes 
