OCT., 1916. MAMMALS, COLLINS-DAY EXPEDITION OSGOOD. 201 



Lama glama huanachus Molina. GUANACO. 



Six specimens, Pampa de Arrieros, Peru. 



Well-preserved skins and skulls of three male and two female 

 guanacos and one complete skeleton are in the collection. The herds 

 from which they were obtained are almost if not quite the northernmost 

 now existing and the specimens will be of great interest in determining 

 the geographic variation in the species. This cannot well be attempted 

 until specimens are secured from central Chile, the type locality of 

 Molina's huanachus. It is evident, however, that the Peruvian gua- 

 nacos of this collection are not closely related to the "small Peruvian 

 guanaco " to which Lonnberg has given the name Lama glama cacsiloensis 

 and which shows great similarity, at least in certain cranial characters, 

 to the vicugna. In size our specimens are only slightly smaller than 

 the Patagonian guanaco. A skull of an adult male measures as follows: 

 Total length 290 (307)*; basal length 277 (290); greatest width 148 

 (146); least postorbital width 61.5 (64); length of three upper molars 

 59 (63); width across middle of second upper molar 69 (75); greatest 

 length of nasal laterally 63 (78). 



Measurements of an adult male, taken in the flesh by the collector, 

 are as follows: Length "from between ears to root of tail" 1300; cir- 

 cumference of upper neck 330; of lower neck in front of shoulder 550; 

 girth behind foreleg 1080; girth at middle of belly 1160; girth at loin 

 860; base of ear to point of shoulder 650. 



Lama vicugna Molina. VICUGNA. 



Four specimens, Pampa de Arrieros, Peru. 



These consist of skins and skulls of two males and one female and 

 skeleton of one male. So far as recorded, they are the only first class 

 specimens of this species ever brought to a North American museum.t 

 This is perhaps on account of the poverty of North American museums 

 in South American material rather than because of the rarity of the 

 animal; but it is evident that the vicugna is not easy to procure even 

 in those localities where it is still common. 



Measurements of an adult male, taken in the flesh by the collector, 

 are as follows: Length "from between ears to root of tail" 1250; base 

 of ear to point of shoulder 670; circumference of upper neck 260; of 

 lower neck in front of shoulder 430; girth behind foreleg 840; girth at 

 middle of belly 960; girth at loin 750. 



*Measurements in parentheses are those of a Patagonian guanaco published 

 by Lonnberg. (Archiv. for Zoologi, VIII, No. 19, p. 2, 1913). 



fThe specimen recorded as Lama vicugna by Elliot (Cat. Mamm. Field Mus., p. 

 37, 1907) proves to belong to another species. 



