44 
under-wings and tail-covers yellow ; back olive-coloured ; wings and 
tail brown, with red margins. 
SauropHacus Lictor, Gray & Mitch. Genera of Birds, t. 62. 
Lanius lictor, Licht.—Saurophagus pusillus, Swains.—Swainsonii, 
Gould. 
Diag.—Only the margins of the outer webs of the wings rufous ; 
wings 86 mm. long. It shows the finest bill, a more graduated tail, 
and the smallest dimensions. 
Hab. Brazil, Para. 
SAUROPHAGUS SULPHURATUS. 
Lanius, Gmel.—Tyrannus, Vieill. Enl. 296. 
Diag.—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. 
SauropHaGcus Dersianus, Kaup. (Aves, Pl. 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. Saur. Saur. Saur.Der- 
lictor. sulphuratus. JSlavus. byanus. 
Heal caveats tee hee OAL SeRUey Ri ee-oe .-: 60 
Bill, from the forehead... 22 .. 29-30 .. 35 .. 32 
— from the gape...... 26 .. 32-36 .. 40-42 .. 38 
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Dad oti h Seed. Te eotiortbfdiorie rt 82586 I IF 1B eve £98 
Tarsus). .veneegn nuns oie DG hztaz G25 =2 7; es) MA 2B) les SMES 
Middle-toe with the nail.. — .. 21 C ai3Om oes 
In these dimensions Saurophagus Derbianus is very near to Saur. 
avus. 
‘5 In what relation with the subgenus Scaphorhynchus, Pr. Max., this 
little subgenus Saurophagus is to be placed, I shall determine in my 
next monography, Muscicapide. 
Of the subgenus Scaphorhynchus, Ch. Bonaparte, in his very use- 
ful Conspectus, has given five species :—pitangua, flaviceps, atriceps, 
audazx, and chrysocephalus. 
The species flaviceps and atriceps must go down, because flaviceps, 
Sw., is a female, and atriceps a young bird of pitangua; audax does 
