SCIURIDZ—SCIURUS HYPOPYRRHUS. 749 
known species, the tail being about three inches longer than the body,—a 
proportion found in no other Mexican Squirrel. The general size, as well as 
the narrowness of the tail, gives further evidence of its correct reference 
being here. There are, furthermore, two specimens in the collection that 
agree fully with Bennett’s description, which I have no hesitation in referring 
to this species. 
The Sciurus variegatoides of Ogilby and the Sciurus griseocaudatus of 
Gray, from the “west coast of South America”, I am convinced are both 
referable to this species, and hence also Gray’s “var. 1” of Gray’s Macroxus 
colliai. They agree closely with the specimens from Panamaand La Union. 
The Sciurus varius and S. socialis of Wagner were referred by Wiegmann 
to this species, as I think, incorrectly. The former seems to more nearly 
agree with S. boothia, while the latter I am unable to identify. 
This seems to be a common species in Southern Mexico and Central 
America southward to Ecuador, and presents, as noted above, widely varying 
phases of coloration. 
In several specimens of this species, in which the dentition could be 
examined, there were generally found two upper premolars, but two out of 
four alcoholic examples had only one. 
TaBLE XLV.—Measurements of eleven specimens of SCL\URUS HYPOPYRRHUS. 
. a 
5 From tip of nose to— | Tail to.end of— | Length of— a 
B Locality. z F ¢ s % oo 
a Meee) | ao | oe” | Geleg.aainas 
3 Bela Solow foe oh |B | el Slee 
2 | a| A | R | Oo a S 5 & | A | & A 
9392 | Guayaquil, Ecuador .-............... 9 | 1.10 | 2.00 }....-. 12.50 | 12.00] 14.25 | 1.50 | 2.30 | 0.85 | Skin. 
9393 |....-. OO ei teas ocioan cece eo seacnsis=s do | 0.93 | 1.80 |-.--..-. 12.25} 13.75 | 16.25 | 1.50 | 235 | 1.00 |....do. 
9014 |..-... COM. ose eet Rico soscbsace. ----| 1.10 | 1.98 | 242] 12.50} 11.00] 13.50 | 1.45 | 2.35 | 0.80 |....do. 
7019 | La Union, Central America ......... fo | 1.18 | 1.98} 2.38} 12.25] 12.25] 15.20 | 1.55 | 2.40 | 0.76 |....do, 
€495'| Nicaragua ........---..----.---..... fo | 1.13 |} 220) 252) 12.00] 11.00} 13.75 | 1.75 | 255 | 0.70 |....do. 
£628 | San José, Costa Rica .........-....-. (9} ecrcee, ee abintltesces 9. 00 9.75 | 12.00 | 1.35 | 2.25 | 0.75 |....do. 
7205 | Goazacoaleos, Mexico - Sem eMOON Po LOn pedo) A300) | 2.22. oc|cocence 1.45 | 2.45 | 0.78 |..-.do. 
*4266 Q | 1.20 | 2.20 | 2.65 11.25} 11.25] 12.65 | 1.55 | 2,40 | 0.80 | Alcoholic. 
*3646 GY | 1.05 | 2.00 | 2.57] -10.40 | 10.40} 12.85 | 1.65 | 2.50 | 0.90 |....do. 
#3045 9 | 0.95 | 1.90] 2.45] 10.25) 10.00 |.....-.. 1.55 | 2.43 | 0.95 |....do. 
#3643 9 | 1.13 | 2.07 | 2.47) 10.25 10.35 | 12.60 | 1.65 | 2.47 | 0.95 |....do. 
* In Museum of Comparative Zodlogy, Cambridge, Mass. 
