ENTOMOLOGY. 875 



Certain European species of Lecanium and species collected from intro- 

 duced plants, (t. B. King and L. Reii {But Mus., Aid. Pflanzcnschutz, Ihimhiinj, 3 

 ( 19()0-i;nil), pp. 5).— DescTiptive and biological notes on each species of this genus. 

 A table is presented sb.owing the food plants of different species. 



Inspection and certification of nursery stock, W. M. Scott {Georgia Slate Bd. 

 Ent. Hill. ,), pp. l.',ji</.-<. ,!). — In thi.s l)ulletiii instructions are given to Georgia nursery- 

 men concerning the recjuircinents of the Cieorgia law and rules and requirements of 

 the board governing insi)ei-ti()n and transportation of nursery stock. Information is 

 also furnished to outside nurserymen who desire to sell stock in the State of Georgia. 

 Brief notes are given on woolly aphis and crown gall, which are considered danger- 

 ous and prevent the issuance of certificates. 



How to make a fumigating house so as to distribute the gas, E. D. Sandek- 

 SON {liural Xew Yorker, 60 {1901), No. 2609, p. 707, fig^. .7).— A Ijrief description is 

 given of some details of structure of a fumigating house designed for the purpose of 

 distributing the gas as equally as possible throughout the space. 



Report on the work of the Section for Plant Protection from January 1, 

 - 1900, to March 31, 1901, C. Brick {Bot. Mus., Alt. Pflanzcnsckutz, Hamburg, 3 

 {1900- 1901), pp. 10). — Of the apples which were introduced from America during this 

 period 4 barrels, 1 basket, and 931 crates were found to be infested with San Jose scale. 

 Tables are given showing the localities from which the apples were shipped and giv- 

 ing the comparative infestation of different varieties of apples. San Jose scale was 

 found for the first time in Hamburg on apples shipped from Canada. Besides the 

 San Jose scale, Chionaspsis furfur is, Aspidiotus cameUix, A. forhesi, and ifi/titaspis 

 pomornm were foun<l on apples. Two crates and one basket of pears were f(jund 

 infe.^ted with San Jose scale, and other scale insects were also found on this fruit. 

 Brief notes are given on the importation of dried fruit from California, Eastern 

 United States, and South America, with notes on the condition of this fruit and para- 

 sites found upon it. Large quantities of living plants imported from Japan an<l the 

 United States were inspected. The San Jos6 scale was found on a number of species 

 from Japan, but was not discovered on living plants coming from America. 



The use of calcium carbid in the destruction of phylloxera, F. V.\ssillieke 

 {Bid. Min. Agr. [France], 20 {1901), No. 2, pp. 222-22S).— The author carried out a 

 series of experiments in combating phylloxera by applications of pure calcium car- 

 l)id mixed in various preparations with lime and the residues of calcium carbid. 

 .In one series of experiments the residues alone were used; in the second, a mixture 

 was used containing 80 per cent of residues and 20 of calcium carbid; in the third, 

 a mixture containing 80 per cent of lime and 20 per cent of calcium carbid; and in 

 the fourth, a mixture containing 25 per cent of residues, 25 per cent of lime, anil 

 50 per cent calcium carbid. The various experiments indicate conclusively that 

 I>h(jsphorated hydrogen and ammonia are the insecticides and fertilizing constitu- 

 ents of calcium carbid. The pure carbid was found to be less effective than the 

 residues from its manufacture for the destruction of phylloxera. It was found that 

 as much as 2,000 kg. of the residues per hectare were ai){)lied without injury to the 

 vineyards. It is recommended that 500 kg. per hectare be adopted as a safe and 

 effective treatment. 



During these experiments it was found that success or failure from the use of cal- 

 cium carbid and its residues depended largely upon the condition of the soil with 

 regard to moisture. Treatment was successful only when the soil was in a normal 

 state of humidity, and failed when the soil was very dry and also when it was 

 excessively moist. This treatment was found to be equally applicable to all soils. 

 The results obtained from these experiments were fully as satisfactory as those 

 oljtained from the use of bisulphid of carbon, and the treatment does not in any way 

 endanger the life or vitality of the grapevine. 



