% 



NEW NORTH AMERICAN EARTHWORMS 181 



Holotype.—U.S.liiM. no. 20248. 



Remarks. — The subspecies is named in recognition of Miss Lola 

 Swift, graduate student at the University of Illinois in 1917, who 

 made a careful study of it and contributed some of the data used. 



LITERATURE CITED 



The following list includes titles of papers to which reference has 

 been made, and in some of them may be found lists of other litera- 

 ture dealing with American representatives of MegascoUdcs and 

 PluteJlus. 



Benham, William Blaxland. 



1892. Descriptions of three new species of earthworms. Pruc. Zool. Soc. 

 London, 1892, pp. 136-152, 2 pis. 



ElSEN, GUSTAV. 



1894. On California Eudrilidae. Mem. California Acad. Sci., vol. 2, pp. 



21-02, 18 pis. 

 1900. Researches in American Oligochaeta, with especial reference to 



those on the Pacific coast and adjacent islands. Proc. California 



Acad. Sci., ser. 3, vol. 2, pp. 85-270, 10 pis. 

 McCoy, Fredeuick. 



1878. Prodromus of the zoology of Victoria, vol. 1, decade 1, pp. 21-25, 1 pi. 



MiCHAEXSEN, Wn.HELM. 



1921. Neue und weuig bekannte Oligochaten aus skandiuavischeu Sauim- 

 lungen. Arkiv for Zool., vol. 13, no. 19, 25 pp., 1 pi. 



PB21RIEII, EDMOND. 



1873. Etude sur un genre nouveau de lombriciens (genre FlutelJus, E. P.). 

 Arch. Zoo]. Exp. et G^n., vol. 2, pp. 245-208, 3 figs. 

 Smith, Feank. 



1897. Upon an undtscribed species of McgascoUdes from the United States. 

 Amer. Nat., vol. 31, pp. 202-204. 

 Stephenson, John. 



1930. The Oligochaeta, 978 pp., 242 figs. Oxford. 



U S, GOVERNMENT PRINTING OFFICE; 1938 



