58 
Mr. P. L. Sclater on the genus Muscisaxicola. 
its occurrence near Mendoza, on the eastern side of the Andes; 
and in the Cordilleras of Chili it appears to be found in many 
localities. 
4. Muscisaxicola mentalis, Lafr. & D’Orb .; Philippi & 
Landb. 1. c. p. 85. 
My specimens of this species were obtained by Mr. Bridges, 
probably in Chili, where, from Messrs. Philippi and LandbeclCs 
observations, it appears to be very abundant. It is found also 
in Bolivia (D’Orb.), Peru (Tsch.), and Patagonia (D’Orb.), ap¬ 
parently descending into the lowlands in winter, and passing 
the summer among the higher Andes. 
I have one example of M.macloviana from the Falkland Islands. 
This form may be entitled to specific separation on account of 
its larger size, though otherwise hardly different. I measure 
as follows :— 
Long. tota. alse. eaudse. tarsi. 
M. macloviana .... 7*2 . . 4*5 . . 3*00 . . 1*25 
M. mentalis, a.6*0 . . 3*7 . . 2*25 . . 1*10 
„ „ b.6*2 . . 4*0 ." . 2*50 . . 1*10 
5. Muscisaxicola rubricapilla, Philippi & Landb., sp. 
nov., 1. c . p. 93. 
Undoubtedly a good species, I think, judging from the single 
specimen obtained from Dr. Leybold. Inhabits the Cordilleras 
of the Chilian provinces of Colchagua and Santiago. 
6. Muscisaxicola rufivertex, Lafr. & D'Orb.; Philippi & 
Landb. 1. c. p. 95. 
My Bolivian examples of this species agree with the Chilian 
skins received from Dr. Leybold. 
7. Muscisaxicola flavivertex, Philippi & Landb. L c. p. 98, 
is certainly M. flavinucha, Lafr., described and figured Rev. Zool. 
1855, p. 59. I have a single specimen in my collection, said to 
be from Chili. 
8. Muscisaxicola nigrifrons, Philippi & Landb. 1. c. p. 101, 
is a good species. To me it seems most nearly allied to M. al - 
bifrons , but differs in its black forehead, lighter upper surface, 
and longer bill. I suspect, however, this is Burmeister^ Pty - 
