180 LEPTtraus. 



Todus, baring for its prototypes a host of represen- 

 tations in nearly all the families and genera of the 

 perching birds, of which it is only necessary to 

 mention Troglodytes, Orthotomus, Crateropus, Flu- 

 vicoldy SynallaxiS) &c. to give an accurate idea of 

 the structure of the bird before us. "We have no 

 doubt that other species of Leptums^ and probably 

 its types of form, will be detected, when the im- 

 mense number of South American flycatchers, which 

 we already know of from books and museum speci- 

 mens, are properly examined, setting aside those 

 which still remain undiscovered in that productive 

 region, the central metropolis, as it were, of fly- 

 catching birds. The structure of the toes and claws 

 in Lepturus ruficeps will detach it from the typical 

 todies, while the length of the tarsi and the com- 

 pression of the bill, removes it far away from the 

 little tyrants (Tyrannufa). 



