[gleeaikin]

Another significant boloid event apparently occurred on or around August 13, 1930. This would have coincided with the passage of the Perseid Meteor Showers. While it was not as big as Tungusku, it still shook up this sparsely settled area of Brazil.

http://www.google.com/search?hl=en&num=100&newwindow=1&q=Asteroid+event+in+Brazil%2C+1930s&btnG=Search&aq=f&oq=&aqi=

[SunkenCiv]

I probably have something about that somewhere, but meanwhile:

Target: South America
by William Corliss

Circa December 11, 1935. British Guiana (now Guyana). Only five years after the Brazilian event, a large bolide apparently smashed into the jungle of Guyana. Buried in the library stacks, we found a mostly forgotten trio of reports on the 1935 event in a 1939 issue of The Sky, predecessor of Sky & Telescope. The articles suggest that the devastated area "may equal or exceed that of the great Siberian meteor of 1908."