[54] REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 
The following, from the replies to the circular, shows the variety of opinions prevail-' 
ing among planters in regard to the average annual losses caused by caterpillars : 
Numbers of answers 
to circular, ques- 
tions 24 and 25. 
Estimated percentage 
of loss annually. 
1 
33^ to 50. 
66| 
33^ 
50 
25 
33£ 
Sometimes total. 
25 
10 
2 
3 
4 
5 
6 
8 
10 
14 
18 
This gives an average loss of 34f per cent., or say 33^. 
The opinions and estimates here given may safely be taken to represent also those 
of more than a hundred cotton-planters with whom I conversed upon this subject in 
the r>rovince of Pernambuco. 
Table showing the official value, in milreis, of the cotton exported from Brazil during the 
twenty-four years from 1851-52 to 1875-'70, and the losses caused by caterpillars. 
Provinces. 
Official value 
of exports 
from 1851-'52 
to 1875-'76. 
Losses from 
1851-'52 to 
1875-76. 
Pernambuco 
Alagoas 
Maranbao 
Parabyba 
Ceara 
Sao Paulo 
Babia 
Bio de Janeiro 
"Rio Grande do Xorte. - . 
Sergipe 
Piauhy 
Para .'. 
Rio Grande do Sul 
Total for tbe Empire 
Eeduced to dollars. . . 
Milreis. 
142, 858, 211 
69, 051,267 
72, 523, 990 
57, 322, 080 
42, 404. 566 
20, 715, 404 
29, 396, 222 
19,311,395 
10, 575, 432 
1,747,678 
2. 617, 479 
542, 961 
3, 164 
Milreis. 
71,429,105 
34, 525, 633 
36, 261, 995 
28, 661,040 
21, 202, 283 
10, 357, 552 
14, 698, 111 
9, 655, 697 
5, 287, 716 
873, 839 
1, 308, 739 
271, 480 
1,582 
4G9, 
549 234, 534, 774 
$249, 545, 000 $124, 772, 500 
Note. — Thepar value of tbe Brazilian milreis is 27 pence. But during the period covered by tbe table, 
the fluctuations were very great, owing largely to the war with Paraguay. The average rate of ex- 
change was 26§ pence and the reductions are made at this average rate. 
This table represents the official value of the exports previously given. It is in- 
complete, on account of the exports not being given for every year from some of the 
provinces. Neither is the cotton used for home ccnsumption included in the amount 
upon which the losses are calculated. 
If the losses are computed for the whole production including home consumption of 
cotton in the Empire for the 24 years, it gives 700,136,037 pounds as the total loss in 
cotton, or an average annual loss of 31,922,335 pounds. 
BOLL WORM. 
No Boll Worm was found in the provinces of Pernambuco and Bahia, and though 
Careful inquiry was made among the planters for it, they agreed that no such insect 
was known in that part of the country. In the replies to the circulars which I sent 
out. a lew Boll Worms are said to be found in the province of Maranhfio, where they 
do but little injury to the cotton. Another correspondent from the same province 
says that ho docs not know of such a caterpillar. Taken together they may indicate 
That the Boll Worm does exist in that province, but that it rarely attacks the cot- 
ton. The answer from the province of Bunas Geraes admits the presence of the Boll 
Worm, whilo those from the province of Pernambuco, with the exception of one, say 
that it is not known there. I have been able to find no reference to it in the writings 
upon cotton in Brazil. 
