640 



REPORT OF STATE GEOLOGIST. 



Genus Reithrodontomys Giglioli. 



Reithrodontomys Giglioli, Richerche intorno alia distrib. geogr. 

 gener., p. 60, 1873. 



The mice of this genus resemble the house mouse and white- 

 footed mice in form, but are generally a little smaller. They can 

 always be distinguished from the other slender, longtailed mice by 

 the grooves in the upper incisors. In this respect they resemble 

 Synaptomys, but they differ from the species of that genus in hav- 

 ing slender bodies and long tails. 



REITHRODONTOMYS LECONTII (Audubon and Bachman). 

 HAKVEST MOUSE.I 



Reithrodontomys lecontii Audubon and Bachman, Journ. Acad. 

 N^t. Sci. Phil., Vol. 8, pt. 2, p. 307, 1842. 



Ochetodon humilis Evermann and Butler, Proc. Ind. Acad. Nat. 

 Sci. for 1893, p. 139, 1894. 



Description and range. — Color russet brown above, somewhat 

 darker on the head and middle of the back ; beneath grayish white ; 

 tail dusky above and whitish beneath. The ears are shorter than in 

 the white-footed mice and the incisor teeth are grooved. The spe- 

 cies is smaller than any other mouse in the eastern United States. 



There is no record of the harvest mouse from Indiana, but spe- 

 cies of the genus occur in West Virginia and others in Kansas and 

 Nebraska. It is, therefore, possible that the species may be found 

 in this State. It is said to live in old fields overgrown with tall 

 grass and trees. 



Genus Oryzomys Baird. 



Oryzoniys Baird, Mamm. N. Amer., p. 58, 1857. 



Form similar to that of the house rat, but size smaller; molar 

 teeth with tubercles in two rows ; incisor teeth orange colored and 

 without grooves; skull with distinct ridges over the orbits; tail 

 long, scantily haired; belly grayish. 



ORYZOMYS PALUSTRIS (Harlan). 

 RICEFIELD MOUSE. 



Mus palustris Harlan, Amer. Journ. Sci. and Arts, Vol. 31, p. 

 386, 1837. 



Galomys palustris Evermann and Butler, Proc. Indiana Acad. 



Sci. for 1893, p. 139, 1894. 

 Description and range. — The generic characters given above dis- 

 tinguish this mous(i from any other likely to occur in our State. 



