FOODS HUMAN NUTRITION. 367 



from Pi/raiista iicliiinbidli.s at Wasliintiton, I). ('.. and llctvroftirUus hriirhi, from 

 Spcnnoiiliaf/ii.s rohUiUr at Forbing, La. 



New parasitic Hymenoptera, J. C. Crawford (Proc. Ent. Hoc. Wash., 11 

 (1909), No. J/, pp. 203-207). — GhjptocoJastcs hruchivorns, a parasite of Bntchus 

 prosopis, at Victoria, Tex.; G. tcxdnus, bred from mesquite from San Diego, 

 Tex., where it is probably parasitic on B. prosopis; Physoihorax russeUi, 

 bred from the fruit of Fir us aurea at Cutler, Fla. ; Elasmus setosiscutellatiis, 

 bred from the heads of sorghum at Dallas, Tex. ; Telenomus coloradensis, from 

 the eggs of NotolopJius oshiri at Colorado Springs. Colo.; and two species of 

 Chalcis are described as new. 



Habits of parasitic Hymenoptera, C. H. Withington (Trans. Kans. Acad. 

 Sci., 22 (1908-9), pp. S1J,-S22, pis. 2).— Notes on the life history and habits of 

 Lysiphlchus cerasapJiis and Ephcilrus rosw n. sp., are given. 



It was found that one fertilized female L. cerasaphis at a mean daily 

 temperature of 75.4° F. and under a mean daily moisture of 72.5, successfully 

 parasitized from 39 to 105 SiphonopJwra rosw with an average of 70.8. The 

 length of time required for the parasite to pass from egg to adult was 16 days, 

 with 15 to 17 days as extremes. It was also found that of the 354 parasites 

 which emerged from this experiment, 70 per cent, or 248, were females. . . . 



" It was found that one fertilized female of E. rosw successfully parasitized 

 under a mean daily temperature of 77.7°, and a mean daily moisture of 73.3, 

 from 19 to 38 8. rosw, with 53.2 as an average. The length of time required 

 for the parasite to pass from egg to adult was 21 days, with 20 to 22 days as 

 extremes. Of the 266 parasites which emerged, 52.2 per cent, or 139, were 

 females." 



Several other species of aphids were exposed but .S. rosa' was the only one 

 th:it either of the two parasites would attack. 



Value of sodium cyanid for fumigation purposes, R. S. Wogltjm (Jour. 

 Econ. Ent., 3 (1910), No. 1, pp. 85-88). — It is stated that, unknown to the con- 

 sumer, sodium cyanid has been used to a limited extent in California in fumi- 

 gation work for a number of years, it being styled "American" cyanid to dis- 

 tinguish it from " German " or potassium cyanid. Consumers have considered 

 both brands to be potassium cyanid, the popular distinction being that one was 

 made in America and the other imported from Germany. 



Following analyses by C. C. McDonnell of the Bureau of Chemistry of this 

 Department, the author conducted fumigation experiments in the field. He 

 finds that in addition to a high percentage of cyanogen, it is equally important 

 that a cyanid be practically free from sodium chlorid, and that a cyanid con- 

 taining in excess of 1 per cent of sodium chlorid should be condemned. In 

 field work, as well as in the laboratory, high grade sodium cyanid produced 

 exactly as satisfactory results as high grade potassium cyanid. 



Insecticides and fung'icides, H. L. Fulmer (Ann. Rpt. Ontario Agr. Col. and 

 Evpt. Farm, 3.'> {1909), pp. 70-81). — A brief summarized account of the work 

 with lime-sulphur washes previously noted (E. S. K.. 23, p. 60) is followed by 

 reports of analyses of sami)les of Paris green, white arsenic, lead arsenate, 

 sodium arsenate, copper sulphate, and Bordeaux paste. 



FOODS— HUMAN NUTRITION. 



The glycogen content of beef flesh, II, P. F. Trowbridge and C. K. Francis 

 (Jour. Indus, and Enyin. Chem., 2 (1910), No. 5, pp. 215, 216).— The authors 

 have continued their study of the glycogen content of beef flesh (E. S. R., 22, 

 p. 760). 



