574 



I'Airr 11. 



CLASSIFICATION. 



Part II contains the descriptions of the tapeworms 

 found in poultry and a discussion of the different 

 species, and it is placed for the most part in fine type 

 because of its rather technical nature. There are, 

 however, a number of points mentioned under the var- 

 ious species which are necessary to the poultry raiser 

 who desires to obtain a thorough knowledge of this 

 subject. I have endeavored to bring together in Part 

 II the entire history of each species, in order to show 

 the exact status of our present knowledge of the group. 



The Bureau is gradually collecting the original types 

 of many of these species, with a view to revising the 

 entire group and placing it upon a more scientific 

 basis. It is our desire also to obtain all the material 

 possible from various parts of this country, and we 

 invite poultry raisers, etc., to furnish bottles of alcohol 

 or formalin, and mailing cases for such sendings. All 

 correspondence should be directed to Dr. D. E. Sal- 

 mon, Chief of the Bureau of Animal Industry, United 

 States Department of Agriculture, Washington, D. C. 



Worms sent to us for study or identification should 

 first be washed in warm water and then placed in 

 alcohol or in the preserving fiuid furnished by the 

 Bureau. 



Tlie following classification by genera is iargely 

 based upon the papers by Blanchard (1892B and 1893). 

 In the specific diagnoses, the original descriptions nud 



