290 The Naturalist iit La Plata, 
landowners, which has been more fortunate in its 
results — or unfortunate if one’s sympathies are with 
the vizcacha — than the war of the Australians 
against their imported rodent — the smaller and 
more prolific rabbit. 
The vizcachas on the pampas of Buenos Ayres 
live in societies, usually numbering twenty or thirty 
Vizcaclias. 
members. The village, which is called Yizcachera, is 
composed of a dozen or fifteen burrows or mouths ; 
for one entrance often serves for two or more distinct 
holes. Often, where the ground is soft, there are 
twenty or thirty or more burrows in an old vizca- 
chera; but on stony, or ‘‘ tosca ” soil even an old 
one may have no more than four or five burrows. 
They are deep wide-mouthed holes, placed very 
close together, the entire village covering an area 
