76 NELSON 



Carpintera. At the latter place the range of this subspecies appears 

 to join that of S. thomasi^ but no intergrades have been seen. 



Measurements. — Avei^age of four adults from northwestern Costa 

 Rica (from dry skins) : total length, 510 ; tail vertebrae 248.5; hind 

 foot 63.2. 



Cranial characters. — Premolars \. Skull like that of 6". *<5. belti., 

 and similar to that of .S'. thomasi but rather larger with slender ros- 

 trum. Two adult skulls from northwestern Costa Rica average : 

 Basal length 51.7; palatal length 27.7; interorbital breadth 21.8; zy- 

 gomatic breadth 35.2; length of upper molar series 11.7. 



General notes. — In the original description of Sciurus dorsalis 

 Gray gave Caracas, Venezuela, as the type locality. Dr. Sclater has 

 since stated' that the type came from Nicaragua, but Mr. Thomas writes 

 that he does not know on what authority. Citations of this squirrel 

 from Nicaragua are probably referable to true adolphei. A number 

 of specimens examined by me from northwestern Costa Rica, especially 

 from near Liberia, agree exactly with Gray's description, and one 

 (No. 15759 U. S. Nat. Museum, from Liberia, Costa Rica) sent Mr. 

 Thomas for comparison was pronounced by him to be absolutely like 

 the type. 



The type locality of Gray's Alacroxus nicoyana, based on a rufous 

 color-phase of 6". a. dorsalis^ was given as Nicoya, a town on the 

 peninsula of Nicoya, in northwestern Costa Rica. S. rigidus of 

 Peters and 6". interrneditis of Gray are based upon a phase of 

 dorsalis in which the head and upper part of fianks are nearly 

 as dark as the middle of the back, but the underparts, lower flanks, 

 and outside of legs and feet are nearly uniform bright rufous. Mr. 

 Thomas has compared a specimen from Alajuela, Costa Rica (No. 

 15757 U. S. Nat. Museum) with Gray's type of i?iter?nedius in the 

 .British Museum and pronounces it identical, differing only in slightly 

 duller colors. The type of S. rigidus came from San Jose, Costa 

 Rica. The type locality of intermedius was given as Guatemala — 

 evidently an error, as no squirrel of this style is found in Guatemala, 

 while it is common in western Costa Rica. 



Specimens examined. — Twenty : from San Jose, La Carpintera, 

 Alajuela, Bebedero, San Mateo, Liberia and Nicoya, Costa Rica. 



SCIURUS BOOTHIA Gray. Honduras Squirrel. 



Sciurus richardsoni Gray, Ann. & Mag. Nat. Hist., x, p. 264, 1842 (not 6*. 

 richardsoni Bachman, 1838). 



' Proc. Zool. Soc, London, 1S70, pp. 670-671. 



