1914.] 



EEITHHODONTOMYS HtJMULIS GROUP. 



Characters. — Closely similar in size and color to liumulis; ears 

 decidedly smaller. 



Color. — Not appreciably different from that of Jiumulis. 

 SJcuU. — Closely similar to that of liumulis. 



Measurements. — ^Average of 9 adults from type locality: Total 

 length, 116 (114-122); tail vertebrae, 53 (50-57); hind foot, 15.7 

 (15-16.5) ; ear from notch, 8.7 (8-9). Skull: (See table, p. 81). 



RemarJcs. — This subspecies is a rather poorly marked race of liumulis 

 occupying the northern end of the range of the species. In the series 

 from the type locality— White Sulphur Springs, W. Va. — I have been 

 unable to see any color differences to distinguish it from liumulis from 

 the coast of the Carolinas. Three specimens from the vicinity of 

 Washington, D. C, however, are considerably paler than the series of 

 topotypes, with which they agree in having very small ears. These 

 may represent an undescribed race, but it seems best not to name it 

 until more material can be secured. 



Specimens examined. — Total number, 12, from the following locali- 

 ties : 



West Virginia: WTiite Sulphur Springs, 9. 



Virg:inia: Alexandria, 1; Falls Church, 1; Fort Myer, 1. 



REITHRODONTOMYS HUMULIS MERRIAMI Allen. 

 Merriam Harvest Mouse. 

 (PI. I, fig. 2; PI. IV, fig. 2; PI. VII, fig. 8.) 

 Reithrodontomys merriami Allen, Bull. Am. Mus. Nat. Hist., VII, 1895, p. 119. 



Type locality. — Austin Bayou, near Alvin, Tex. 



Distribution. — Coast region of east Texas and southern Louisiana 

 north to northeastern Kentucky and West Virginia; east to Ala- 

 bama; limits of range imperfectly known. 



Characters. — Similar to humulis, but upperparts blacker and grayer 

 (less brownish) ; ears smaller and blacker. 



Color. — Adults: Upperparts mixed blackish and hght pinkish cin- 

 namon, the black prevaihng and forming usually a weU-defined stripe 

 in middle of back. Specimens in full, unworn pelage show an indis- 

 tinct lateral stripe of light pinkish cinnamon. Ears blackish brown; 

 tail fuscous above, grayish white below; underparts grayish, some- 

 times with a distinct wash of light pinkish cinnamon. Some speci- 

 mens in worn pelage have a broad median dorsal band of black and 

 scarcely any cinnamon on the sides. Young: Upperparts fuscous- 

 black, practically without cinnamon hairs. 



SlcuU. — Practically identical in size and proportions with that of 

 humulis J but rostrum slightly heavier. 



Measurements. — Average of 7 adults from type locahty: Total 

 length, 113 (107-128); tail vertebrae, 54 (51-60); hind foot, 16 

 (15.5-17). Skull (see table, p. 81). 



