44 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. III. 



Oryzomys palustris natator. 



Oryzomys p. natator. Chapman, Bull. Amer. Mus. Nat. Hist., 

 1893, p. 44- 



Nineteen specimens: 3, Espanita, Anastasia Island; 3, Micco; 

 10, Enterprise; 3, Gainesville, Florida. 



Mr. Chapman, in his description of this form, says that it is 

 darker than North Carolina specimens, and judging from a single 

 example before me, from Raleigh, North Carolina, I should say 

 this was correct, but it will not answer for a character in general, 

 for the examples of O. palustris in the small series before me are 

 very much darker than those representing the subspecies, and so 

 much darker than the North Carolina specimen as to be strik- 

 ingly different. Writing of their nests, Mr. Surber says that 

 "some of them are as large as those of Microtus (Neo fiber) alleni, 

 but can be told from the latter at a glance. Almost invariably I 

 found their nests in bunches of cat-o-nine tails, built up about a 

 foot above the water, but in some cases higher, never being found 

 on the water level. They are composed principally of the blades 

 of the cat-o-nine tails interwoven with some wire grass, with one 

 entrance on the side, rather underneath." 



RHITHRODONTOMYS. 

 Rhithrodontomys lecontei. 



Rhithrodontomys lecontei. (Aud. and Bachm.,) Jour. Acad. 

 Nat. Scien. Phil., 1842, p. 307. 



Seven examples from Gainesville, Florida. 



"A number of the harvest mouse,' 1 says Mr. Surber, "were 

 taken and ruined by ants and hot weather. I found it associated 

 with Peromyscus subgriseus on the high land south of the city, but 

 others were taken on lower land among the broom grass. This 

 mouse apparently lives on the seeds of the broom grass, for it is 

 invariably found in such growth." 



Rhithrodontomys lecontei dickinsoni. 



Rhithrodontomys 1. dickinsoni. Rhoads, Am. Nat., xxix, 



1895, P- 59- 



A single specimen referred to this form was procured at Enter- 

 prise, Florida. 



Mr. Bangs regards this as a very doubtful subspecies, and 

 probably he is correct in so doing, but judging from a single 

 specimen (an unadvisable thing to do), it seems about as worthy 



