Allen.] 188 [December 15, 



SCIURID.&. 



30. Sciurus carolinensis Gmelin. (Gray Squirrel.) 



Said to be more or less numerous in the groves along the water 

 courses. I saw, however, but very few. 



31. Sciurus ludovicianus Custis. (Western Fox Squirrel.) 

 Common in the same situations as the preceding species; I saw it 



much more frequently. It was, however, far less numerous than I 

 found it to be in Ogle county, Illinois, or in southern Michigan, in both 

 of which localities there was a much greater predominance of forest. 

 In these latter localities the preceding (S. carolinensis) was also ex- 

 cessively abundant, both in its black and gray colors, and in every 

 intermediate stage between gray and black. The young, as I have 

 already mentioned in another connection, 1 more frequently represent 

 the intermediate stage, their fur presenting the annulated appearance 

 mentioned by Prof. Baird as characterizing intermediate color varie- 

 ties. 8 This form of S. carolinensis was more especially abundant in 

 Illinois, where the greater part of the large number of specimens I 

 examined were of the dusky, annulate-haired type; they were also 

 all young. 



32. Sciurus hudsonius Pallas. (Chickare. Red Squirrel.) 

 This species does not appear to occur in the parts of Iowa I visited. 



I saw not a single specimen, and although I made extended inquiries 

 respecting it, could not learn that it had ever been seen here. I also 

 found it unknown in Ogle county, Illinois (one hundred miles west 

 from Chicago), though said to occur sparingly in some portions of 

 northern Illinois, by Mr. R. Kennicott, 3 and also in northern Mis- 

 souri and central Iowa; but in respect to the latter locality I 

 think he mav have been mistaken. I never anywhere, however, saw 

 it so numerous as I have found it to be in southern Michigan (Van 

 Buren and Allegan counties). Somewhat to the northward of Iowa, 

 as in the forest region of Minnesota, it is said to be very numerous, 

 and to extend thence far to the westward. Dr. Hayden says it occurs 

 on the eastern side of the Black Hills, in Nebraska. 4 



1 Bulletin Mus. Comp. Zoology, No. viii, p. 222. 



2 Mammals of North America, p. 244. 



a Patent Office Rep. Agriculture, 1856, p. 68. 



4 I am far from sure that either of the supposed species called Sciurus Fremonti, 

 S. Iiichardsoni and S. Douglassi are distinct from the common S. hudsonius of the 

 eastern part of the continent. The differences between them are very trivial, and 

 in respect to what these are, authors are by no means unanimous. They are gen- 



