60 lURDS OF TIKRliA DEL FUEGO 



The bird, therefore, of Patagonia and Tierra del Fuego, 

 amounts to a distinct race. 



The acumination of the two outer primaries at once 

 distinguishes the adult male. There is some little difference 

 in the colouring of this pair: the male shows less white on 

 the outer web of the primaries and secondaries ; the breast 

 and abdomen have not the decided cinnamon tinge ; the 

 outer web of the outer tail feathers shows more yellowish 

 white. 



This Tyrant is not common. I saw four, at odd times, at 

 long distances from one another. It is a solitary, silent creature, 

 of mysterious habit, appearing and vanishing as unexpectedly as 

 rapidly. It frequents thick scrub, such as the dense growth of 

 CMliotrichum amelloideum in the Sierra Carmen Sylva where 

 I shot my second example. 



D'Orbigny records it " excessivement commune aux environs 

 de Valparaiso." 



Darwin says nothing of its habits beyond that "he was 

 assured by the inhabitants that it is a very fierce bird, and that 

 it will attack and kill the young of other birds." 



However this may be, the stomachs of my specimens 

 contained only coleoptera ; but the large powerful bill, with 

 its remarkable hook at the extremity, is certainly intended to 

 cope with other prey than these. 



MYIOTHERETES RUPIVENTRIS (Vieillot) 



Pepoaza Vientre roxizO, Azara, Pdxaros, Paraguay y La Plata, ii, 



p. 172, 1805. 

 TyrannUS ruflventriS, Vieillot, Nouv. Diet. d'Hist. Nat., xxxv, p. 93, 



1819. 

 XolmiS Variegata, Gotild and Darwin, Voy. ''Beagle," Birds, p. 55, 



pi. xi, 1841. 

 Pepoaza variegata, D'OrUgny, Voy. Amer. Merid., Ois., p. 349, 



pi. xxxix, 1835. 



