68 



SINGING BIRDS — OSCINES. 



Genus THRYOTHORUS, \ieillot. 



Thriothonis, V:eili.ot, Analyse, 1S16. (Not of ISIU.) 

 IViri/ollionis, Vieili.ot, Xouv. Diet. XXXIV. 1S19, i)5. 

 This name was intendud bv ViciUot to u|i|il_v tu tlic Ccri/iia jialuslris, Wilson; Thrijothorm arun- 

 dineus, Vieillot. 



Gex. C'ii.\u. Bill about as long as the head; nearly straight to near the tip, whicli is 

 abniptl}' (leciirvcd with an obsolete notch. Gonys nearly straight. Hind toe nearly e(|iial 

 to the middle ; the lateral toes ecjiial, reaeliing to the base of the middle claw. Tarsus 



T. LuUovicianiis. 



longer than the middle toe. Wings about etjual to the tail, which is arched, and nearly 

 even ; the first or second lateral feathers moderately graduated ; the feathers narrow ; the 

 width of the longest about one tenth its length. 



T. Bexokkii. 



The type of the genu.s is T. Ludovicianus. The California species lielong 

 to a sub-genus Tliryomancs, the ch;\racters of ^vhieh are expressed in tlie 

 above diagram. There are several other species of the genus peculiar to 

 Mexico and Central America, and another closely allied form is Thri/ojAilus, 

 differing in having the nostril entirely exposed, instead of having a thick- 

 ened scale-like overhanging process. 



