FOODS ANIMAL PEODUCTION. 



273 



liife history of Margarodes flegia, H. G. Dyar {Canad. Ent., 32 {1900), No. 4, 

 pp. 117,118). — The author gives descriptions of the different larval stages of this 

 insect, which is reported as injurious to TJteretia neriifolia at Key West, Fla. 



The fight against the Nun (Ocneria dispar L.), Y. Sjostedt {Meddel. K. 

 Landthr. Sii/r., 1900, Xo. GO, pp. 'J9). 



A parasitic organism in the intestine of Olocrates gibbus, L. Leger ( Compt. 

 Rend. Soc. Biol. Pari.% 52 (1900), No. 11, pp. 261-268).— in the intestine of this 

 beetle the author found a parasitic fungus to which the name Rhaphidospora is 

 given. This parasite attacks epithelial cells of the intestinal wall. Its systematic 

 position was not determined by the author. 



The development of the wing in the Lepidoptera, W. F. Mercer {Jour. New 

 York Ent. Soc, 8 {1.900), No. 1, pp. 1-20, p)ls. 5) . — Detailed anatomical studies on the 

 wing development of Pieris rapse. 



The systematic position of the locust fungus imported from the Cape, 

 D. McAlpixe {Af/r. Gaz. New South. Wales, 11 {1900), No. 3, pp. 184-186, pi. 1).— 

 After a careful study of this fungus, which has been used with considerable success 

 in destroying locusts in South Africa and has also been imported into parts of Aus- 

 tralia, the author concludes that his original determination of this species was correct 

 and that the fungus should be referred to Mucor racemosm. 



Fumigation of nursery stock, S. A. Beach {New York Stale Sta. Bui. 174, pp. 8, 

 Jigs. ^^).— The author gives a general account of the necessary api^aratus and chem- 

 icals, and the method to be adopted in applying the treatment by hydrocyanic-acid 

 gas to infested plants. A description is also given of a fumigation house which is 

 suitable for this purpose. 



Insecticides, C. H. Jones and B. 0. White ( Vermont Sta. Rpt. 1899, pp. 147, 

 148). — Analyses are briefly reported of the following substances: Paris green, green 

 arsenite. Laurel green, Bug Death, and Herbicide. 



FOODS— ANIMAL PRODUCTION. 



Food products examined, E. F. Ladd {North Dakota Sta. Rpt. 

 1899^ pp. 12., 13). — The author reports the composition of ji number 

 of samples of foods and feeding stuffs, including wheat breakfast 

 food, wheat, flax bolls or hulls, spelt, spelt husks, and beef from a 

 3-year-old steer and from a cow 7 years old. The digestibility of the 

 samples of beef cooked and uncooked was tested with pepsin solution. 

 The results obtained follow: 



Dirjedibilittj of cooked and uncooked beef in pep.sin solution. 



Amount digested. 



In li hours. In 3 hours. In 6 hours. In 18 hours, 



Porterhouse steak from 3-year-old steer 



Leg roast from 3-year-old steer , 



Leg roast from 7-year-old cow 



Porterhouse steak from 3-y ear-old-steer 



Leg roast from 3-year-old steer 



Leg roast from 7-year-old cow 



Per cent. 

 89.10 

 88.70 

 86.90 



Per cent. 

 90.60 

 91.20 

 90.00 



9.5.4 

 91.7 

 91.6 



94.8 

 93.8 

 93.2 



Per cent. 



95.50 

 94.70 

 94.80 



96.3 

 95.2 

 95.2 



8058— No. 3 6 



