LÖNNBERG, ON SOME MAMMALS FROM THE ARGENTINE CHACO. 19 



the genus Cerdocyon as defined by Thomas 1914. Burmeister 

 mentions that the skull of C, melampus »nicht untersucht 

 werden konnte», and no measurements of the same are 

 published. 



MiVART^ simply puts melampus among the synonyms of 

 cancrivorus. 



J. A. Allén uses the name melampus for two specimens 

 of this group, which were from »Maripa upper Rio Caura».* 

 These animaJs were not above the average »Crabeater» size 

 with a total length of the skulls of 134 and 137 mm. resp. 

 As Wagner has declared that his melampus was from »Mato 

 Grosso und dem Rio Araguay, also aus dem Hochlande des 

 mittlern Brasiliens», Allen's views are not supported by the 

 zoogeographical conditions. 



Studer appears to regard Wagner's melampus only as 

 a variety of thous. Two specimens described* by the author 

 quoted from »Orgelgebirge, Colonia Alpina» are not larger 

 than average »Crabeaters», and the length of their upper 

 carnassial is 13 and 12 mm. resp. If these specimens are 

 to be counted as Wagner's melampus is rather uncertain. 

 It depends upon whether the name melampus ought to be 

 applied to the in Brazil rather widely distributed dark form, 

 or if it is to be restricted to the large dark race of Måtto 

 Grosso, C. mimax Thomas (ef. below). Studeras specimens 

 certainly do not show any close affinity to the »Crabeater» 

 from the Chaco Austral. 



In the year 1903 Thomas wrote as follows: »The large 

 and widely distributed black-footed Brazilian form [of thous] 

 ought apparently to bear Wagner's appropriate name of C. 

 t. melampus»,'^ The word »large» stånds, however, here evi- 

 dently only as a contrast to the smaller race angulensis from 

 Pernambuco, described at the same bpportunity by Thomas, 

 and to other more nothern, small races of the /Äow5-group, 

 because 1914 (1. c.) the same author enumerates the name 

 melampus among those which according to his opinion are 

 applicable to skulls which measure, as quoted above, about 

 138 mm. in condylobasal length, When writing about the 

 synonyms of the »Crabeaters» in the year 1915 Osgood 



^ Monogr. of Canidae, 1890. 



^ Bull. Amer. Museum Nat. Hist. 1911. 



' Uber siidamerikan. Caniden., Mitt. d Naturf. Ges. Bern, 1905. 



' Ann. Mag. N. H. (7), Vol. XII, p. 461. 



