454 



Zoological Society. 



wings 86 mm. long. It shows the finest bill, a more graduated tail, 

 and the smallest dimensions. 

 Hab. Brazil, Para. 



Saurophagxjs sulphxjratus. 



Lanius, Gmel. — Tyr annus, Vieill. Enl. 296. 

 Diaff. — Only the margins of the outer webs of the wings rufous ; 

 wings 110-114 mm. long. 

 Hab. Amer. meridional. 



Saurophagus flavus. Gray. 



Corvus, Gmel. 



Diag. — Only the margins of the outer webs of the wings rufous ; 

 wings 126-130 mm. long. 



Hab. Brazil meridional. Bolivia. 



Saurophagus Derbyanus, Kaup. 



Diag. — The wing-feathers from the second to the sixteenth have 

 the whole outer webs on the greatest part of the length rufous ; 

 wings 128 mm. long. 



Hab. Zacatecas, in Mexico. 



Comparison of the dimensions. — 



Saur. 



lictor. 



Head 41 



Bill, from the forehead. . * 22 



from the gape 26 



Wings 86 



Tail 74 



Tarsus 16 



Middle-toe with the nail . . — 



Saur. 



53-58 

 29-30 

 32-36 

 110-114 

 82-86 

 25-27 

 21 



Saur. 

 flavus. 



60-62 



35 

 40-42 



130 



100 



28 



30 



Saur.Der- 



60 

 32 

 38 

 128 

 92 

 29 

 26 



In these dimensions Saurophagus Derbyanus is very near to Saur, 

 flavus. 



In what relation with the subgenus Scaphorhynchus, Pr. Max., this 

 little subgenus Saurophagus is to be placed, I shall determine in my 

 next monography, Mnscicapidee. 



Of the subgenus Scaphorhynchus, Ch. Bonaparte, in his very use- 

 ful Conspectus, has given five species : — pitangua,flaviceps, atriceps, 

 audax, and chrysocephalus. 



The speeiesy?a»?ce/3« and atrice2is must go down, because^ai'ic<?p*, 

 Sw., is a female, and atriceps a young bird o{ pitangua ; andax does 

 not belong to this subgenus, and is to be placed in the neighbourhood 

 of rufinus, Spix, and circiimcinctus, Sw., which have the same bill 

 and similar covering. 



We have only two species, pitangua and chrysocephalus, Tchudi, 

 in the section of Scaphorhynchus. 



Scaphorhynchus, with its broad bill, shorter and feebler tarsi and 

 toes, represents more the Swallow type, and must be placed in the 

 second rank of his genus. 



