of the Loiver Pilcomayo. 125 



18. Arremon polionotus, Bp.: Scl. Cat. Birds, xi. p. 278. 

 (No. 7\, S •) Near Fortiri Donovan. April 24tli, 1890. 

 Frequent in the patches of thick forest on the Pilcomayo. 

 [This is a South-Brazilian species which might well be 



expected to occur here. Natterer obtained it in Cuyaba. It 

 must be now added to the Argentine list. — P. L. S.] 



19. Saltator similis, {Op. cit. i. p. 41.) 

 Rio Pilcomayo. April 18th, ]890. 



Common amongst the brush, but less numerous than 

 S. ccerulescens. 



20. Saltator c^rulescens. [Op. cit. i. p. 42.) 

 (No. 105, cJ.) Near Fortin Page. May 21st, 1890. 

 Very abundant amongst the bushes. 



21. Saltator aurantiirostris. {Op. cit. i. p. 42.) 



(No. 120, S; 11^. ? •) Near Fortin Page. May 26th, 

 1890. 



Frequent in similar localities and along with S. similis and 

 ;S^. ccerulescens, but not abundant. Utters a series of chirping 

 notes of small range. 



22. GuiRACA cyanea. {Op. cit. i. p. 43.) 



(No. 146, c? .) Fortin Page. July 22nd, 1890. 

 Along with other Finches in the brush by the river margin. 

 Not common. 



23. Spermophila melanocephala. {Op. cit. i. p. 45.) 

 (Nos. 1, 167, 168, c? .) Fortin Page. August 9th, 1890. 

 Abundant : in small flocks wherever there is tall coarse 



grass, amongst which they feed. 



24. Spermophila c^rulescens. {Op. cit. i. p. 46;) 

 Fortin Page. July 22nd, 1890. 



Frequent in flocks amongst brush and tall grass along 

 with S. melanocephala. 



25. PlROARIA CtJCULLATA. {Op. cit. 1. p. 47.) 



(No. 64, ? .) Near Fortin Donovan. April 20th, 1890. 



Very abundant in trees and bushes by river-banks. 

 Generally in company with P. capitata. On one occasion I 

 counted thirty P. cucullata in one small tree. 



