1919] 



LIST OF PUBLK.'ATIONS. 



XI 



U. S. Deimrtinent of Ayriculturc — Con. 



Scientific Contributions — Con. Page. 

 Rearing of Queens, E. W. 

 Atliins 359 



Notes on Some Genera and 

 Species of Chalcid Flies 

 Belonging to the Aphelin- 

 iuse with Description of 

 a New Species, A. B. 

 Gahan 360 



Additions and Corrections 

 to A Li.st of Families and 

 Subfamilies of Ichneumon 

 Flies of the Superfamily 

 Ichneumonoidea (Hymen- 

 optera), H. L. Viereck__- 360 



The Average Correlation 

 within Subgroups of a 

 Population, S. Wright— 366 



U. S. Department of Agriculture — Con. 



Scientific Contributions — Con. Page. 



The Sterilization of Dairy 

 Utensils on the Farm and 

 a Demonstration of a New 

 Steam Sterilizer, G. B. 

 Taylor 372 



Observations on the Wash- 

 ing of IMllk Cans, R. O. 

 Webster 373 



Refrigeration on Southern 

 Dairy Farms, J. T. 

 Bowen 374 



A Comparison of Bacteria 

 Counts in Whole and 

 Skim Milk, Separator and 

 Centrifuge Cream, R. W. 

 Lamson 375 



