4 ARKIV FÖR ZOOLOGI. BAND 12. N:0 10. 



With regard to the exteriör of this broeket it ought to 

 be pointed out that it has not the hair of the nape or neck 

 reversed, but directed in a normal way backvvards. Allén 

 does not lay much stress on this character, as he has found 

 it to be variable. The British authors Thomas and Lydek- 

 KER on the other hand use it as a distinctive character, and 

 the latter has quoted^ it as a feature common to the whole 

 M. americana-gr ou^) in which he includes 31. ruja. Its im- 

 portance may be debatable, bnt it is in this connection of 

 a certain value to state the normal condition of the hair of 

 the neck of this specimen, not only in consequence of the 

 statements quoted above, but also because the red broekets 

 of the Chaco Austral to be described below have (unlike 

 this one) the hair of their neck reversed. The somewhat 

 smaller race jucunda which Thomas has discribed from Serra 

 do Mor, Paranä, S. Brazil, is also characterized by its having 

 »nape-hairs reversed». 



The general coloiir of the red broeket of the Chaco Cen- 

 tral is ricli rufous (somewhat brighter than Oberthur & 

 Dauthénay's »fawn», 308,2). On the withers the colour is 

 somewhat darker, because many hairs are there tipped with 

 blackish. The same is also the case along the upper neck, 

 but the sides of the neck are much paler and duller (almost 

 similar to Oberthur & Dauthénay's »cinnamon» 323, i) which 

 colour also extends över the sides of the head and the 

 throat.^ The lengthened hair on the forehead is in the 

 middle a rather dull fawn, but dark brown (somewhat re- 

 sembling »chocolate») all round, and more broadly so between 

 the antiers. A similar dark brown extends forwards as a 

 broad band on top of the nose to the muffle. Above the 

 eyes there is a broad band of a dull rufous colour which 

 gradually blends with the »cinnamon» of the sides of the 

 head. There is no white on the upper lip. The back of the 

 ears is dark brown. The mesial tract of the lower parts 

 from the chest and backwards is dull grey brown, rather 

 similar to the dorsal colour of M. simplicicornis. The cen- 

 tre of the belly round the genital organs etc. is sparingly 

 beset with whitish hairs. The före legs are entirely rufous. 



* Cat. of the Ungiilate Mammals, Brit. Mus., Vol IV, London 1915, 

 p. 199. 



' M. r. jiicunda is »vvliitish» on the throat. 



