24 ARKIV FÖR ZOOLOGI. BAND 14. N:0 4. 



It may be added to this that P. reissii has the size of 

 the upper carnassial and upper molars nearly equal to the 

 corresponding dimensions of P. lycoides but considerably 

 larger than in P. magellanicus. 



Professor Trouessart has very carefully described P. 

 reissi under the name of Canis magellanicus riveti^ and illu- 

 strated his memoir with fine pictures as well of the animal 

 as of its skulls seen from different sides. When comparing 

 it with the typical magellanicus he also observes quite cor- 

 rectly that the former has a skull which looks more »thooide», 

 while that of the latter is more »alopecoide». I have the 

 pleasure of entirely agreeing with him in this, and I think 

 therefore that the wild dog of Ecuador may be regarded as 

 a distinot species of its own, which not hinders that it is 

 nearly related to the southern canids mentioned above, but 

 they have developed in somewhat different directions from 

 the common origin. 



Consul Söderström has communicated that this wild 

 dog is called »Lobo» at Quito, and that it is »very destruc- 

 tive to sheep, chicken, rabbits etc.» It is thus biologically 

 as well a veritable wolf. 



Potos flaviis modestus Thomas. 



A fine series of 7 specimens with the following dates: 

 a. 1 c? ^/n 1914 from Mindo; b. 1 J* '7? 1915 & c. 1 $ i^io 

 1915, Gualea, 5,000 feet altitude; d. 1 J* 25/^ 19^7^ below 

 Gualea, 3,000 feet altitude; e. I ^ June 1918, Hambo, near 

 Gualea, 5,000 altitude; /. 1 ^; g. 1 J*, 7i 1920 Gualea, 5,000 

 feet altitude; (/. & g. not sexed, but to judge from the skulls 

 they are males.) 



These specimens are practically from the same locality 

 and must thus represent the same race. It is therefore of 

 interest' to study their variation. With regard to the colour 

 specimens a and b are the brightest and e is rather similar. 

 Their general colour may be termed yellowish buff (Ober- 

 THiJR & Dauthenay, 310, 2 & 3) overlaid with brown, which 

 is more richly developed along the middle of the back so as 

 to form a dark stripe. This stripe is, however, obsolete on 



^ Mammiféres de la Mission de TEquateur par Je Dr. Rivet. 



