BIBLIOGRAPHY. 
53 
Boarmia rhomboidaria var. perfumaria and Gnophos obscuraria. 
He then goes on to say : — Aberration of colour in an insect 
may be occasional and purely accidental, but when we see, 
not single specimens, but a constant and invariable pre- 
valence of this harmonizing with the surrounding soil, I can- 
not but think that the cause may be mainly the powerful 
impression of surrounding objects on the female during the 
all-important period of life, viz., that of propagation, coupled 
with an instinctive provision for the protection of its future 
progeny; at any rate, the subject merits a further and deeper 
investigation.” I do not know that this theory has ever been 
carried further, and I am inclined to think that Mr. Tugwell 
is now more in favour of the “ natural selection ” theory from 
Dr. White’s point of view than any other. I think, myself, 
with regard to this, that it would account for very few cases 
of variation, and then only such as appear to me to be better 
explained in other ways. {To be continued^) 
IBLIOGRAPHY. 
Additions to the British List and Changes in Nomenclature. 
COLEOPTERA. 
Heterocerus britannicus, n. sp., Kuwert, Verhandlungen der kaiserlich- 
kdniglichen zoologisch-bota?iischen Gesselschaft in Wien, Dec, 1890, p, 
535. The Rev. W. W. Fowler, has a specimen from Dumfries 
{E.M.M., 133). 
H. fusculus. Kies. The species known by this name in Britain = AT. 
pulchellus. Kies. (W. W. Fovvler, E.M.M., p. 133). 
Diptera. 
Gonia riificeps. Fin. becomes Germaria ruficeps (R. H. Meade, 
E.M.M., p. T25). 
Bigonicheta spinipennis, Mgn. = a var. of B. selipennis. Fin. (R. H. 
Meade, E.M.M., p. 128). 
Bigonicheta, Rnd. and Actia, Dsv. = subgenera of Thriptocera, Mcq. 
(R. H. Meade, E.M.M., p. 128). 
Hemiptera. 
Scolopostethus grandis, Horv. = S. punctatus, Edw. A. adjunctus, D. 
and S. = S. affinis, Schill. S. adjunctus, Edw. = A. thomsoni, Reut. A. 
neglecius, Edw. = a slight var. (with the first antennal joints partly black) 
of A. iho 7 nsoni {)Aoxv2X\\, E.M.M., p. 117). — J. W. Tutt. 
URRENT NOTES. 
I 
If any of the promised subscribers to my work on Varieties of 
British Noctuce have not yet received a copy of vol. i., I shall be 
