44 



under-wings and tail-covers yellow ; back olive-coloured ; wings and 

 tail brown, vnth red margins. 



Saurophagus lictor, Gray & INIitcli. Genera of Birds, t. 62. 



Lanius lictor, Licht. — Saurophagus pusillus. Swains. — Swainsonii, 

 Gould. 



Biag. — Only the margins of tbe outer webs of the wings rufous ; 

 wings 86 ram. long. It shows the finest bUl, a more graduated tail, 

 and the smallest dimensions. 



Hab. Brazil, Para. 



Saurophagus sulphuratus. 



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

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

 wings 110-114 mm. long. 

 Hah. 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 Derbianus, Kaup. (Aves, PI. XXXVI.) 



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 naU . . — 



Saur. 

 sulphuratus. 



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- 

 byanus. 



60 

 32 

 38 

 128 

 92 

 29 

 26 



In these dimensions Saurophagus Derbianus is very near to Saur. 

 Jlavus. 



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

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

 next monography, Muscicapidce. 



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

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

 audax, and chrysocephalus. 



The species^at)2cep« and atriceps must go down, hec&Mse flaviceps, 

 Sw., is a female, and atriceps a young bird oi pitangua ; audax does 



