34 ARKIV FÖR ZOOLOGI. BAND 14. NIO 4. 



liairs and have already attained a length of about 8 — 9 mm. 

 In a similar way the orange coloured tips of tlie new hairs 

 are to be seen between the tail-hairs of the female specimen 

 from Mindo obtained in June. It may be concluded from 

 this that at least the females get their new pelage in the 

 months quoted. The Mindo specimen collected in August 

 does not show any halfgrown hairs. 



The male from Piganta has also the largest skull with 

 a total length of nearly 54 mm. This fact is mostly due to 

 the length of the nasal portion of the skull, the nasals 

 measuring 17 mm. J. A. Allén has already pointed out 

 the variability of this Sqirrel even with regard to the nasal 

 bones, but this appears to be above the known maximum. 



"Simosciuriis" stramiueus giiayanus Thomas. 



2 $$ ^Vi 1916, above Guayaquil, 100 feetaltitude. These 

 two specimens had been brought in flesh to Consul Söder- 

 ström, as he states on the label, and preserved by him. 



The Squirrels of the stramiueus group are known to vary 

 in an unusual high degree individually, but four different 

 subspecies have been named and also recognized as such by 

 J. A. Allén in his review of the South American Squirrels.^ 

 The present specimens agree most nearly with the descrip- 

 tion which Thomas has published^ for the subspecies which 

 he named as above. They are not quite alike, but as cha- 

 racteristic for them may be mentioned a white spöt on top 

 of the nose (but absence of a nuchal patch) and the white- 

 tipped hairs of the back. The differences between the two 

 specimens lies therein that one of them is more black on 

 top of the head than the other and has the orangerufous 

 rings on the hairs of the rump and base of tail, as Thomas 

 describes, but these are lacking in the other, which has 

 whitish rings also on those parts. The first specimen has 

 the under side dark brown, but grizzled grey in the middle. 

 The other has its under parts rather påle yellowish brown, 

 partly with light tips to the hairs. In spite of these discre- 

 pancies it is evident, that both specimens must be referred 



^ Bull. Amer. Mus. Nat. Hist. XXXIV. New York 1915. 

 - Ann. & Mag. N. H. (7) V 1900, p. 150. 



