ENTOMOLOGY. 67 



different seasons in the same locality. The first application in most 

 localities should 1)e made soon after the flowerino- period, and an effort 

 should be made to wet every part of the plant, since the eggs are 

 deposited indiscriminately on the leaves or upon the young fruit. 



Report of analyses of Paris green and other insecticides, L. L. 

 Van Slyke (^V^//' Yorh State St<i. Bui. l(J'>,pp.'2'21-2Sli). — On account 

 of frequent complaints of the inefficiency of Paris green, the station 

 undertook a chemical investigation of this and other insecticides. 

 Tables are givcni showing the percentage composition of chemically 

 pure Paris green or copper aceto-arsenite. 



In 24 samples of Paris green which were analyzed, the quantity of 

 arsenious oxid varied from 55.34 to 60.16 per cent and averaged 56.48 

 per cent. The amount of copper oxid in these samples varied from 

 27.7 to 30.9 per cent, and averaged 29.97 per cent. In pure Paris 

 green, the ratio of arsenious oxid to copper oxid should be 1.87 : 1. 

 In the samples of Paris green which were analyzed, this ratio varied 

 from 1.82 to 2.17 : 1, and averaged 1.88 : 1. The ammonia test indicated 

 the samples to be for the most part free from white arsenic. In all 

 samples the amount of arsenious oxid exceeded the legal requirements. 

 The only adulterant w^hich was found was white arsenic, and this in 

 only 2 cases. 



Brief notes are given on analyses made of the following insecticides: 

 Paragrene, Black Death, Slug Shot, London purple, Laurel Green, 

 Smith's Electric Vermin Exterminator, and Bug Death. In the New 

 York law regarding Paris green there is nothing to prevent the addi- 

 tion of anj^ quantit}' of white arsenic to Paris green. This is consid- 

 ered a decided defect in the law, but from the samples which were 

 analyzed it would appear that it has not been taken advantage of to 

 any considerable extent. The text of the New York law is appended 

 to the l)ulletin. 



The queen bee, A. Gale {Agr. Qaz. Neto South Wale.% 11 {1900), Nos. 1, pp. 

 28-:U; :i, p)>. 127-130). — Popular notes on the life history and habits of the queen 

 bee. 



Care of bees in February, L. Wolff (Devi. Lanclw. Precise, 21 {1900), No. 9, 

 }). 84). — On account of the small honey flow during the previous season, spring feed- 

 ing is recommended. 



The histolysis of the adipose body in the bee, L. Terre ( Compt. Rend. Sac. 

 Biol. Paris, 5£ {1900), No. 7, pp. 160-162). — In young larvfe of bees the adipose body 

 consists of a numl)er of more or less rounded cells inclosing large, clear vacuoles. 

 The nucleus of these cells is conspicuous and sharply outlined. The histolysis of 

 this body takes place by a sort of digestion and does not depend upon leucocyte 

 phagocytosis. 



The principal household insects of the United States, L. O. Howard, C. L. 

 Marlatt, and F. H. Chittenden {U. S. Dept. Agr., Division of Entomology Bui. 4, 

 n. s., rev. ed., jtp. 131, figs. 64). — This is a reprint of Bulletin 4 of this Division with 

 slight changes (E. S. R., 9, pp. 62-66). 



Notes on the part played by insects as carriers of infection, P. Sonsino 

 {British Med. Jour., 1900, No. "2041, pp. 328, 329). — This paper reports a study on the 



