1918.J Cape San Antonio, Buenos Ayres. 377 



with a little earthy matter or sand). The lining consists of 

 fine roots, to which often is added horsehair and, more rarely, 

 some wool or a little cow-hair. 



The full clutch of eggs is from three to four (I have seen 

 one of Hve), in the proportion of two of the former to one of 

 the latter. Ground-colour pale or dull blue, thickly marked 

 with reddish brown, tending to increase towards blunt end. 

 They are more even in appearance and shape than those of 

 Turdus rufiventris, with which, as I have remarked, they 

 may be easily confounded. 



Measurements: General average 28x21 mm. Largest 

 clutch 30x21 mm. ; smallest 28x20 mm. 



8. Mimus triurus (Vieill.). White-banded Mocking-bird. 



Of this Mocking-bird, so enthusiastically celebrated by 

 Hudson, 1 have only one recorded appearance— a solitary 

 specimen shot by Mr. M. A. llunnacles from an Ombu tree 

 m the Estancia patio, in the autumn of 1896. We were 

 both much iiiterested in its occurrence. 



10. Polioptila diimicola (Vieill.). B.-nsh-loving Fly-snapper. 



A most dainty and charming species, resident, but irregular 

 m Its appearance, irrespective of any question of migration. 

 Generally in pairs (I have seen three such in one morning), 

 they someiimes associate three or four together, even fi^ve 

 or six, which last, being at the end of January', probably 

 constituted a family group. These pairs or parties may 

 sometimes be found for several days in the same locality, 

 after which they move on. Either they are worshippers 

 of the sun for its heat, or profit by its light in their food- 

 researches ; for I have frequently observed one of the 

 groups busily employed on the cast side of a small wood in 

 the early morning, and on the west side towards sundown. 

 Mr. Hudson, after alluding to its "short notes," states that 

 "it has no song." I mjself, on the contrarv, find (under 

 date of 8 August) that I 'Hwice heard it 'singing very 

 prettily"; and again (from 1-17 September), "noticed 

 that it has a very sweet short song." 



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