240 The Zoologist— June, 1866. 



which I think is very probable, or it may perhaps stop the increase 

 altogether.* 



The securing a succession of three generations, including some 

 accidents, have with me extended over a period of about five nionllis, 

 and 1 am quite prepared to admit that the proof of agamic reproduc- 

 tion in this Acarus would have been more satisfactory if continued 

 through a longer period, but after reading Prolessor Huxley's paper 

 on the Agamic Reproduction of Aphis, jn part of which he slates that 

 "in Myriapoda and Arachnida the ])rocess is not known,"* I have 

 thought that the few facts 1 have just given were of sufficient value to 

 bring before j-our notice. 



I am, moreover, in a position now to supply a limited number of 

 living specimens to any one who is anxious or willing to investigate 

 the subject, and I can at any rate promise a certainty in the supply of 

 food, for I find that they are perfectly satisfied with the common 

 cheese-mile. 



A further investigation, therefore, into this subject, only requires the 

 expenditure of a moderate amount of time and care, and the im- 

 portance of agamic reproduction may be estimated by the attention 

 it has already received from the most scientific naturalists. 



Notes on the Quadrupeds of Lanarkshire. 

 By Edward R. Alston, Esq. 



(Continued from S. S. 160.) 



Bank Vole. — Since writing my notes on this species (S. S. 9 and 

 159) my attention has been called to Macgillivray's 'British Quad- 

 rupeds' (vol. xvii of the ' Naturalist's Library '), from which it appears 

 that specimens of this species from Kelso, and from Bathgate, in 

 Linlithgowshire, had come under that gentleman's notice (p. 272). I 

 was therefore mistaken in supposing that this vole was new to Scotland, 

 although it has been very generally overlooked. Mr. Macgillivray 

 well observes that " Although the habits (of our native Mammalia) 



* (March 16, 1866). Since writin<r the above, one of the specimens last referred 

 to was killed ; the other laid eggs which hatched on the 29th of December, and one of 

 these young ones is still alive, but isolated in the same way as its predecessors. The 

 cold of the winter has retarded the development of these Acari very considerably, and 

 so much so as to allow the other colonies of Acari to appear again in their wonted 

 numbers. 



t Linn. Trans, vol. xxii. part 3, p. 216. 



