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 Oldened and the })reparati()n stirred about every hvc minutes to 

 prevent it from caking at the Ijottom. Considerable experience is 

 necessary to make a wash by this method, and the strength of the 

 j)ro(hict is very uncertain. The specific gi-avity indicates that quite 

 a good deal of the sul])hur is ]»^ft undissolved. The results with this 

 wash in A'irginia have not been good, and it is not recommended. 

 They are recommending the regular boiled preparation, which, he 

 states, should be lioiled 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 lime-sulj^hur-soda mix- 

 ture pre])ared without boiling has given excellent results. 



AFTER^OOy >^[^SSION. THIRSDAY. J)ECEJJBER 29. lOfh}. 



The meeting was called to order by the president at 2.30 p. m., and 

 tlie following papers Avere presented : 



NOTES ON CUBAN INSECTS. 



By Mel. T. Cook. Saiitiof/o de las ] cgas. Cuba. 



[Abstract.] 



The short time the writer has l)een in Cuba makes it impossible to 

 give more than a preliminary report. Natural conditions are favor- 

 able to a nndtitude of insects, and this r(q)ort will be confined to 

 those of economic importance. Lepido])tera 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. Leaf-miners 

 are vei-y abundant on both wild and cultivated plants. The coffee 

 leaf-miner (Leueoptera cojfeeUa Stain.) is of greatest importance. 

 Many of the Lepidoptera have very short periods of pupation. From 

 15 species Ave have the following figures: 



Species. 

 Ill pupa five days I 



In pupa nine to tbirteen days 9 



In pupa sixteen days 1 



In pupa twenty-two to twenty-tliree days 2 



In pupa twenty-seven days 1 



In pupa twenty-nine days 1 



