LIST OT PUBLICATIONS. 



[Vol.40 



U. S. Department of Agriculture — Con. 



Scientific Contributions — Con. Pa ge. 



A List of Families and Subfam- 

 ilies of Ichneumon Flies of 

 the Superfamily Ichneu- 

 monoidea (Hymenoptera), 

 H. L. Viereck 65 



Sugar Substitutes in Bottled 

 Soft Drinks, II-III, W. W. 

 Skinner and J. W. Sale 68 



An Improved Method for Re- 

 covering Trypanosomes from 

 the Blood of Rats for Antigen 

 Purposes in Connection with 

 Complement Fixation, F. H. 

 Reynolds and LI . W. Schoen- 

 ing 85 



U. S. Department of Agriculture — Con. 



Scientific Contributions — Con. Pagft 



Occurrence of Coccidioidal 

 Granuloma (Oidiomycosis) 

 in Cattle, L. T. Giltner 88 



The Most Pressing Agricultural 

 Development Problem in 

 the United States, C. V. 

 Piper 91 



How Farmers Acquire Their 

 Farms, W.J. Spillman 92 



Agricultural Instruction in the 

 High Schools of Six Eastern 

 States, C. H. Lane 93 



Teaching Food Values, C. F. 

 Langworthy 96 







