24. APPENDIX: NOS. XX.—XXII. 
succeeding years, till under the pressure of unfavourable conditions 
of life they finally disappeared. The appearance of all these insects 
only, or most abundantly, on the east coast, whilst they gradually 
become rarer towards the west, is another strong point. Can I 
suppose that a single worn female of Colias Hyale, which I found on 
a Derbyshire hill the first year of their abundant appearance in 
England, was anything but an immigrant? But I have perhaps 
already said too much on this doubtful and mysterious subject, for 
there is much that might be alleged on the other side of the question, 
which it would be tedious to enter into, and unnecessary in the 
present imperfect state of our knowledge. 
Beeston, 
August 17, 1847. 
XXI. 
Grirron VuLtuRE (Vuzrur FULvUs) : 
CoRRECTION OF A PREVIOUS Error [No. V.]. 
[‘ Zoologist,’ vi. (1848) p. 2063. 
Tue interesting paper from the pen of the Rev. C. Bury, on the birds 
of the South of Spain (Zool. 1958), reminds me to correct a mistake 
I made in a notice on the same subject some time ago (Zool. 1213). 
The Vultures I saw on the banks of the Guadalquivir were evidently 
not the Egyptian Vulture, which I did not at that time know to be 
a comparatively little bird. They were more probably the Griffon 
Vulture. I saw one of the large Vultures stuffed at Tangiers, and 
another in the Natural-History Museum at Gibraltar, killed there 
by Sir Robert Wilson’s son, if I remember right. As, however, the 
Egyptian Vulture is found in those parts of the world, my mistake 
is only worth noticing for the sake of distinguishing the occurrence 
of the large Vulture also. 
3 Roxburgh Terrace, Edinburgh, 
February 7, 1848. 
XXII. 
Lone Caprivity oF A SPECIMEN OF THE LirtLe OwL 
(S7rrx PASSERINA). 
[‘ Zoologist,’ vi. (1848) p. 2141.] 
Ir may be worih recording that the Strix passerina which was stated * 
to have been captured near Derby, in an early number of the 
‘ Zoologist,’ has lived in confinement ever since, till it was killed 
1 (It was stated by Mr. J. J. Brigas (Zool. 1844, p. 645) that a Little Owl, 
taken in or near Derby, was exhibited there alive, 17 May, 1843. British 
