410 REVIEW OF AMERICAN BIRDS. [PART I. 
It stiff remains to be determined whether there is any essential 
family difference between the typical Turdide and the Saxicolide, 
and whether a rearrangement of these groups, perhaps including 
even the Sylviidxe, may not be required. In any case, however, 
that the Myiadestinze must be embraced in the same series, I have 
little question. 
The two genera of Ptilogonatine, as restricted, with the common 
characters given above, differ as follows :— 
Phznopepla. Crest narrow, pointed behind. Outer primaries broad, not 
attenuated nor pointed at end; the Ist half the 2d. Tail rounded, fan- 
shaped; feathers very broad, wider towards end. Bill feeble, rather 
narrow, well bristled ; nostrils sothewhat overhung by frontal feathers. 
Sexes dissimilar; male black; quills with median white patch on inner 
webs; tail not varied. 
Ptilogonys. Crest broad, and decumbent. Outer primaries narrow, attenu- 
ated and pointed at ends; Ist about one-third the 2d. Tail even or 
cuneate, feathers narrower. Bill stouter, much broader, fewer rictal 
bristles ; nostrils much exposed. Sexes similar; color cinereous ; wings 
not varied ; tail feathers with median white patch on inner webs. 
PTILOGONYS, Swanson. 
Ptilogonys, Swainson, Catal. Bullock’s Mex. Mus. 1824, (Type P. 
cinereus. ) 
Ptiliogonys, Swainson, Philos. Mag. I, May, 1827,368. (Same type.) 
Ptiliogonatus, Swainson, Zool. Jour. III, July, 1827, 164. (Same type.) 
Plumage soft, silky, glossy, and rather compact. Head with a broad, full, 
soft crest, not pointed behind. Tibie thickly tufted with full, soft feathers. 
_ Ptilogonys cinereus, SwAInsoN. (Mexico.) 
