126 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
the Reithrodon megalotis is the same as O. humilis. The colors are confess- 
edly the same. The height of the ear (0.43) that is dwelt upon is no greater 
than occurs in typical humilis (see table). The size (3.00) of one of the two 
type-specimens is greater than we have ever determined for humilis by four- 
tenths of an inch, but the other type (2.42 long) is well within the ordinary 
range of humilis. It is interesting to observe that these two animals (Nos. 
1039, 1040, from Sonora, Dr. Kennerly) do not approximate toward either 
O. longicauda nor to the still larger and longer-tailed O. mezxicanus. 
TABLE XXXIII.—Measurements of twenty-six specimens of OCHETODON HUMILIS. 
Nose to— g | q 
o ; 3 
3 Locality. Cotlector. 3 5 iS RS) s Wajureousnecs 
a J ' = 2 > 3s = = imen. 
E A est fees ie er tea fie a eas 
A ic} _ 3° a a & fea} ee 
2535 0. 60 |.----- Alcoholic. 
2536 0. 60 |.....- eels, 
2537 0.50 |..---- <w oe GOs 
2538 by peceee sido: t 
1064 0. 62 | 0.40 | Dry. 
1252 0.58 | 0.41 |... do. 
1993 0.61 | 0.41 |....do. 
1995 0.59 |-..... peers 
2248 0.56 | 0.39 |....do. 
4699 0. 60 |10. 43 |....do. 
4700 0.61 | 0.40 |....do. 
4701 OsO8e eee mete eaedO. 
4948 | Southern United States -.. -| 0.35 | 0.73 | 0.89 | 2.15 | 1.90 | 0.27 | 0.58 | 0.47 | Alcoholic. 
8526 | Neosho Falls, Kans..-...-- | eee Aeros tee 2.55 | 2.30 |....-- OG) eecees Fresh, except 
feet. 
8527 | ..--.- Oe ae eee ac Saa cese| 2.33 |/2.20 |... --- 0,63 |..---- aosedos 
8528 |..-..- Ge Seton scnadoccsase eae 2.37-| 2.25 |.-.-- 0. 64 |...--- seein 
Bo29i |e aa= (seme asece wil a= . . E 2.30 | 1.70 | 0.28 | 0.63 | 0.40 | Alcoholic. 
8530 |..--.. GO ascgtosscncRe =, bese . a b 2.00 | 2.00 | 0.25 | 0.60 | 0.88 |..-.do. 
8133 | Burlington, Kans 25005 |\:15'90) |fes- ee 0. 64 |.....- Dry. 
9339 | Buchanan County, Iowa...) G. & C. Blackburn-}....-.|..-.--|.----- 2.60 | 2.10 |..... 0.65 |...... ----do. 
3095 | Pole Creek, Nebr.-...-..-- aS AWE exes ee -scal eoatd||oaee5ss 2F50))|/2550) }on- == 0. 64 --- do, 
2569 | Saint Louis, Mo ........-- G. Engelmann .-..|.....-].---- 0.75 | 2.00 | 2.00 |...... 0. 64 |. Alcoholic. 
WOO) | eeeerere dO meee rasan semetl| roti Geeta cae sees tosetal boson eeeee than Part} |ssen- 0.61 |. = 2d; 
7302 | Calcasieu Pass, La .....-- G. Wiirdemann ...| 0.38 | 0.70 | 0.80 | 2.20 | 2.20 | 0.30 | 0.66 | 0.37 |....do. 
4957 | Camp Floyd, Utah ...-...-.. C.S. McCarthy... -.| 0.33 | 0.62 | 0.82 | 2.00 | 1.£0 | 0.25 | 0.60 | 0.40 |.-..do. 
PERE | Geas- GU Seo teoassrocecane Sotiltir Aas sesase- 0.34 | 0.63 | 0.83 | 2.00 | 1.80 | 0.24 | 0.6L | 0.39 |....do. 
* This is the identical length of body ascribed to the smaller of the two specimens of ‘‘ megalotis”’. 
t This is the identical length of ear ascribed to the larger of the two specimens of ‘‘ megalotis’’. 
OCHETODON LONGICAUDA, (Baird) Coues. 
Reithrodon longicauda, Barrp, M. N. A. 1857, 451 (California) —?TomrEs, Proc. Zool. Soc. 1861, 284 
(Guatemala). 
Ochetodon longicauda, Cours, Proc. Acad. Nat. Sci. Phila. 1874, 186. 
Dracnosts.—O. humili similis, sed caudd longiore, truncum superante, et 
pedibus paululum volidioribus ; coloribus magis flavicantibus, Long, tot. 2-2%, 
€ 
caud@ 24-3, pedis 3. 
