196 Landwirtschaftliche und forstliche Biologie. 



Many die earlier. There is a great mortality among the young before they take 

 their first meal. 



The number of pupae laid by a feraale depends upon the length of her life. 

 For a female living four raonths the number is about 10 to 12 pupae. For one 

 living six months, the number is 15 or more. The rate of pupa laying, counting 

 from the time the first one is laid, is about one pupa every 7 or 8 days. 



Pearl. 



456) Thomas, TV. A., A Little Known Lantern Fly of Corn. In: South 

 Carolina Agr. Exp. Sta. Bull. 174, S. 1 — 7. Dec. 1913, 



In this paper is given life history notes of the lantern fly, Peregrinus maidis, 

 Ashm., its distribution, nature of injury to corn and methods of control. 



Pearl. 



457) Watsoii, J. R., Tomato Insects, Root-Knot and "White Mold". In: 

 Univ. of Florida Agr. Exp. Sta. Bull. 112, S. 21—39, Dec. 1912. 



This paper describes injuries and gives remedies for the following enemies 

 which attack the tomato. Heliotkis obsolcta, Heterodcra radlcicola, Euthrips tritici, 

 Cutworms, Phlegethonüus quinquemacidata and PJrfegetkontius sexta, Eriophyes cala- 

 cladoplwra, Megoura solani Thomas, Flea-beetles, Epicauta spp., Celerio lineata, Pro- 

 denia cridania, Grasshoppers, Dicyphus minimus Uhler, Aleurodes tabaci and Leptino- 

 tarsa decemlineata. Pearl. 



458) Scott, J, BL, Pig-Feeding. In: Univ. of Florida Agr. Exp. Sta. Bull. 113, 

 S. 45—59, Febr. 1913. 



The results are given of a series of feeding experiments on 87 pigs, all pure 

 bred Berkshires. The experiments were conducted at different seasons of the year, 

 the length of feeding periods varying from 30 to 114 days. Pearl. 



459) Floyd, B. F., and Stevens, H. E., Melanose and Stem-end Rot. In: 

 Univ. of Florida Agr. Exp. Sta. Bull. 111, S. 1—16, Dec. 1912. 



In this paper is given a description of Melanose and Stem-end Rot, their 

 source of origin, and the most successful methods for Controlling these diseases. 



Pearl. 



460) Sampson, A. W., Natural Revegetation of Range Lands Based 

 upon Growth Requirements and Life History of the Vegetation, In: 

 Journ. Agr. Research, Vol. III, No, 2. S. 93—149, Nov. 1914. 



This paper gives in füll the data upon which the System now in use in the 

 National Forests of the United States, of revegetation of lands which have been 

 used for grazing purposes, is based; the life histories of the important forage 

 species, including growth requirements and the factors influencing the establish- 

 ment of reproduction; the relative merits of different Systems of grazing; and, 

 finally, a description of a rational and economical grazing System based upon the 

 requirements of the forage plants and of the stock industry. Pearl. 



461) Burns, Gr. P., Studies in Tolerance of New England Forest Trees. 

 I. Development of White Pine Seedlings in Nursery Beds. In: Vermont Agr. 

 Exp. Sta. Bull. 178, S. 127—143, March 1914. 



A Statistical study of germination and early growth of white pine seedlings. 



Pearl. 



