77 



present: carnations, figs, pomegranates, oranges, camellias, azalias, 

 chrysanthemums, Saxifraga sarmentosa, polygala, hardy cuttings, etc.; 

 insects: several hundred mealy bugs from vinca vines were picked, 

 placed in a shoe box cover, and put in this room just before fumigat- 

 ing it. 



Results. — Over 80 of the mealy bugs in the box cover were examined 

 with a lens, but none of them were alive. No live ones were found 

 anywhere in the room. The leaves of the figs and pomegranates, which 

 were just beginning to come out, were injured. Some of the fig leaves 

 that were partly formed dropped. The other plants were uninjured, 

 excepting the tender veronicas. 



TRIAL XIV. 



Conditions. — Date, February 28 and March 2, 1899; place, the pit; 1 

 oz. cyanide of potash to each 3,000 cu. ft. ; left in all night; 3 oz. cyanide 

 of potash, G oz. water, and 4J oz. sulphuric acid required; tempera- 

 ture, 54° F. 



Results. — At the first fumigation, February 28, most of the a green fly" 

 were killed, but not all, owing to the fact that the jar used in fumigating 

 was too large, and the cyanide was not all immersed. On March 2 a 

 smaller dish was used. There was no injury to plants in either case. 

 The "green fly" were all killed the second time. 



TRIAL XV. 



Conditions. — Date, March 1, 1899; place, vegetable house, complete; 

 1 oz. cyanide to each 3,000 cu. ft.; left in all night; 4 oz. cyanide, 8 oz. 

 water, 6 oz. sulphuric acid required; temperature average, 45° F.; 

 insects: "greenfly"; plants: headed to heading lettuce and small let- 

 tuce, small cabbages, parsley, old smilax, papyrus, hibiscus, strawber- 

 ries, radishes, kale, and Bellis perennis. 



Results. — In this trial the jar was too large and the liquid did not 

 cover the cyanide, some remaining undecomposed until morning. The 

 "green fly" were, however, nearly all killed. There was no injury to 

 any plant. 



TRIAL XVI. 



Conditions. — Date, March 2, 1899; place, cactus room; 1 oz. cyanide 

 to each 2,000 cu. ft. ; left in all night ; 3.5 oz. of cyanide, 7 oz. water, 5.3 oz. 

 sulphuric acid required; temperature, 58° F.; insects: mealy bugs, 

 "green fly"; plants: agaves, cacti, cinerarias, pereskia, begonias, 

 mahernias, asparagus, vincas, calceolarias, doryanthes, ferns, oxalis, 

 acacias, cyclamen, clematis, etc. 



Results. — In the morning there was a stronger odor than usual in the 

 house. The "green fly" were killed. Of 10 mealy bugs examined 

 6 were dead, the larger ones being the ones alive, as a rule. The only 

 injury to plants was on the marguerites: a part of the blossom buds 

 were burned just below the bud, causing the buds to droop. 



