Article X. — Notes on Species of North American Oligochaeta. 

 III. List of Species found in Illinois, and Descriptions 

 of Illinois Tubificida; By Frank Smith. 



The study of Illinois Oligochtzta has been mostly confined 

 to collections of the Illinois State Laboratory of Natural 

 History, made near the Biological Station at Havana, 111., 

 and in the vicinity of the University of Illinois, at Urbana ; 

 it is probable, therefore, that several species occur in the 

 State which are not included in the following list, Thus far 

 no attention has been given to the Discodrilida and but 

 little to the Enchytr<eidte of the State. 



A list of the earthworms found in North America was pub- 

 lished in 1888 by Garman in Vol. III. of this Bulletin, in 

 which those mentioned as occurring in Illinois are three 

 species of Lumbricidce, one of Acanthodrilidce, and one of 

 Periclueta which had become established in the University 

 greenhouses. To these must now be added seven other 

 species, most of which have been described since Garman's 

 paper appeared. 



The species recorded have all been identified by the writer, 

 but a considerable part of the detailed study of sections of 

 the two new species of Tubificidce here described has been 

 made by a student of the University of Illinois, Miss Ella V. 

 Engstrom, whose careful work has been of material assistance 

 in the preparation of this paper. The drawings for the 

 figures were made by Miss Lydia M. Hart, Artist of the 

 Illinois State Laboratory of Natural History. 



LIST OF SPECIES. 1 



Lumbricidce. 



Lumbricus liercideus Savigny. Urbana ; infrequent. 

 Allolobophora fcetida Savigny. Urbana; abundant. 

 Allolobophora rosea Savigny. 2 Urbana; frequent. 

 Allolobophora profuga Rosa. Urbana; abundant. 



1 The classification of families is that adopted by Beddard in his Monograph. 

 '-' A. 7nvcosa Eisen. 441 



