28 
it get dry. The whole mass is stirred until it is reduced to a thin 
paste, and the barrel is then covered to retain the heat, but should 
be opened and the preparation stirred about every five minutes to 
prevent it from caking at the bottom. Considerable experience is 
necessary to make a wash by this method, and the strength of the 
product is very uncertain. The specific gravity indicates that quite 
a good deal of the sulphur is left undissolved. The results with this 
“ens in Virginia have not been good, and it is not recommended. 
They are recommending the regula ar boiled preparation, which, he 
states, should be boiled vigorously for from thirty to forty minutes. 
Mr. Surface said that in Pennsylvania, with conditions quite simi- 
lar to those in New York, about the same results had been reached. 
Climatic conditions, however, were certainly not wholly responsible 
for such differences in results as were reported by Professor Smith, 
of New Jersey. Occasionally some persons would get entirely satis- 
factory results, while others would fail in the same county. The 
greatest factor in producing unsatisfactory results is lack of care in 
boiling and preparation. In some cases the lme-sulphur-soda mix- 
ture prepared without boiling has given excellent results. 
AFTERNOON SESSION, THURSDAY, DECEMBER 29, 1904. 
The meeting was called to order by the president at 2.50 p. m., and 
the following papers were presented : 
NOTES ON CUBAN INSECTS. 
By MEL. T. Cook, Santiago de las Vegas, Cuba. 
[Abstract. ] 
The short time the writer has been in Cuba makes 1t impossible to 
give more than a preliminary report. Natural conditions are favor- 
able to a multitude of insects, and this report will be confined to 
those of economic importance. Lepidoptera are among the most 
conspicuous and many are very destructive. Cutworms are very 
numerous, especially on corn and tobacco. They are frequently 
parasitized by dipterous and hymenopterous insects. Leat-miners 
are very abundant on beth wild and cultivated plants. The coffee 
leaf-miner (Leucoptera coffeella Stain.) is of greatest importance. 
Many of the Lepidoptera have very short periods of pupation. From 
15 species we have the following ngures: 
: Species. 
LN pupa AVE Gays 2 Sl Sees Fe a ee ee ee L 
Pie pupac MINE Onc IEteGnad AyS = sae aes ae eee 22h eee 
LN pupa. ‘sixteen: daySs..222 8 Seeks eS es ee ee eee 1 
In*pupa twenty-two to twenty-three days =.= 22825525 2s ee ee eee ee 
In-pupa twenty-seven days.22_i2])-) 2 2 22 a ee eee I 
1 
in-pupa twenty-nine days=- ss eee eae ojo te ee eee 
