found in a hole in the rock,above Pulacayo,! found many 
feathers belonging to some species of rinamou,two in 
fact. One feather undoubtly was from Tinamotes pentlandi 
and the others most likely from hothoprocta ornata . 
but neither of them* were seen. They have been huntec^:ooi 
much all round the region of Pulacayo and Uyuni to 
be able to 5 secure specimens except by mere chance. 
. Chocaya ^13,000 feet) 
Chocaya is 83 kilometers south of Uyuni,on the Railway, 
and is a. large tin mine. The mine itself,where we stayed| 
is up a valley some distance from the R.R.,at 13,000 ft. 
and the mill lower down,but still higher than the R.R. 
A large valley is presentbelow,along which the R'R. 
runs. The stream bed is wide but except after heavy 
rains contains but little if any water. In 1936 when’ I 
was there in late June there was more water in the 
"river" than this year in February. We worked up on top 
of the plateau above the mine around 14,000 feet and hig| 
higher,looking especially for Tinamotes ,and spent one 
.day down in the valley. I came here this year to check 
up on the summer species present to get data on mig¬ 
ration • 
I found quite, a number of changes in species 
present here this year.The following species were ta 
this year,which were not collected in 1936: 
Thinocorys orbignyianus (common on mesa and in valley) ;| 
Psilopsiagon orbignyi (a few on mesa and in valley) 
Sical is olivascens berlepschi (common in- valley) 
" luteocephala (l immature taken in valley) 
Muscisaxicola maculirostris (both mesa and valley) 
" alpina grisea (l on mesa) 
On the* other hand the following were not taken or seen,| 
which were collected in 1936: 
Tinamotes pentlandi (undoubtably there,but not found) 
Upucerthia validarostris pallida : Muscisaxicola capistra 
Muscisaxicola, frontalis. Ochthofeca oenanthoides;Phrygilus 
fYU'ti ce1^ rP« Uhlbnlor~ ~ irucTm7aTnxs~ :--“- 
i There seems to be undoubted proof that both Muscisax- 
cola capistrata and M.frontalis were here as migrants in 
June,1936,while the other species not taken in 1938 
were absent from local conditions. 
-f 
l 
Cerdas . (12750 feet) •. 
A 
This is a tiny hamlet 21 kilometers north of 
Chocaya on the Railway,and up on the altiplano 
9 kilometers north of where it breaks-off into the valle; 
below Chocaya. We made a.trip up there especially after 
Rheas• 
