1885.] PROCEEDINGS OF (IMTKIi S lATl S NATIONAL MUSEUM. 405 



Fortunately ou the 30tli of the next uioutb, and in the same valley 

 where I had taken my male and three young, another cai)ture was made, 

 this time a female of the little harvest mouse, Ochetodo7i humilis, with 

 three young barely an hour old. These latter were placed in alcohol, while 

 the mother was carefully measured, skinned, and skeletonized. t The 

 measurements will be found in the comparative tables below. 



Along with the specimens from the National Museum, Mr. True also 

 sent me Coues's measurements and identittcations of the same. These 

 former are in inches and fractions, and as I employ in making such 

 measurements the metric system only, I have carefully reduced Coues's 

 measurements in the table to that scale, in order to conveniently com- 

 pare them with my own, as taken from three of my Fort Wiugate cap- 

 tures, referred to in the foregoing x)aragraphs. 



Table of measurements of six skins of Hesperornys, including the type of H. Truei ; and of 

 one skin of Ocheiodon humilis. 



[Taken in centimeters and fractions.] 



*I have taken the liberty to Sdd a few measurements to those taken by Coues, and correct others. 



tit may be of interest to remark here that of the many specimens of the south- 

 western types oi Neotoma floridana tliat I have taken and measured, the females have 

 always proved to be notably larger than the males. — R. W. S. 



