958 JOURI^AL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI. 



while tlie house-mice are primarily palsearctic (their presence, or 



more correctly their representation, in India being accounted for 



by their close commensalism with man) seems, as pointed out by 



Thomas, to be a valid reason for recognising them as natural groups. 



„ ^no 7 T The following names are avail- 



Ino. Ibl. museums, L. t,i • xi • j • 



TVT ooo 7 , • -r>i able in this genus, arranged iii 



No. 283. bactnanus, Bly. -i r- • -^ . ^ 



' '' order oi seniority, viz : — 



1845. dubius, Hodgson, A. M. N. H., xv, p. 268.— Nepal. 



1845. Jiomourus, Hodgson, I.e. — Nepal. 



1845. urbanus, Hodgson, I.e. — Nepal. 



1846. bactrianus, Blyth. — Kandahar. 



1851. cequicaudalis, Horsfield, Catalogue, p. 143. 



1852. manei, Kelaart, Prod. Zeyl., p. 64. — Ceylon. 



1853. gerbillinus, Blyth, J. A. S. B., xxii, p. 410.— Find Dadan 



Khan, 



1853. theobaldi, Blyth, I.e., p. 583. — Salt Range, Punjab. 



1859. tytleri, Blyth, J. A. S. B., xxviii, p. 296.— Dehra Dun. 



1878. kahhyensis, Anderson, An. Zool. Res., p. 307. — Kakhyen 

 Hills. 



1878. viculorum, Anderson, I.e. p. 308. 



In the present state of our knowledge of this group, I propose 

 to recognise only three forms, viz. : — musculus as representing the 

 actually imported stock ; bactrianus, including gerbillinus and 

 theobaldi, as representing the overlapping paltearctic forms ; and 

 dubius, the oldest name, including all the rest, and representing 

 he old established forms of musculus. 



Key to the forms of Mus. 

 A — Belly white ... ... ... ... 1. bactrianus, Bly. 



B — Belly coloured. 



a. Belly bluish grey ... ... ... 2. musculus, L. 



b. Belly washed with ochraceous ... 3. dubius, Hodgs. 



Distribution : — 



1. M. bactrianus, Blyth. Type locality: — Kandahar (Hutton). 



Other localities : — Quetta (B. M.) ; 

 Jacobabad, Sind (M. S. I.). 



Co-types:— B. M. Nos. 56.2.29.3. 

 & 4, (Type oi gerbillinus, Blyth, Ind. 

 Mus. Calc. No. d. ; Type of theobaldi, 

 Blyth, Ind. Mus. Calc. Nos. d—f). 



Lectotype :— B. M. No. 56.2.29.3. 



2. M. musculus, Liunasus. Type locality : — Upsala, Sweden. 



Other localities : — Imported speci- 

 mens only found in India. 

 Type : — Unknown. 



