iM^'f i 



HO'lf/l 



HELE0DYTE8. ',:ia 



■I •> 



Hill 



r>'i: 



ThryophiluSm ^ 



does not form a bridge. Tail about two-tliirdB 



the wings Ilelerorhina, 



<l. Nostrils iiroftdly open, and exposed ; not overhung 

 by a Bcale, and Htiowing a lateral vertical septum 

 extended forwards above; anterior half in thj 

 ' end of nasal groove. Hill distinctly notched. 

 Tarsi longer than, middle toe and claw. Tail 

 about e(|ual to the wings ..... 

 Bill not notched, slender, or very deep. Nostrils linear, 

 on lower edge of nasal groove, and overhung, sometimes , ■',:;..,; ,i 

 concealed, by an arched or vaulted thickened mem- • . , 



brane with rounded edges. Lateral toes about equal. ;, • 



a. Bill very stout and deep, as long as the head ; 



height about one-third the length above. Wings 



about equal to the tail . . • . . . Pheugopedius, 



b. Bill slender. Tail about equal to the wings, or, if 



shorter, only moderately graduated (outer at :.., . , ,. 

 least four-fifths of central). Hind claw shorter ,, , , 

 than the rest of the toe. A lateral nasal septum, <•,,, ■ 



vertical and projecting into the posterior portion ■ \ 



of the nasal cavity. (,,. i,> . 



1. Bill as long as the head. Tail iVaihers , .. ; 

 broad, about as long as the wings. 



Tail equal to the wings .... 

 Tail longer than the wings 



2. Bill shorter than the head. Tail feathers 

 narrow. Colors plain. , , , , . 



Tail equal to the wings .... 

 Tail shorter than the wings 



c. Bill slender. Tail shorter than the wings, very 



much graduated. Lateral feathers about two- 

 thirds the central. Hiud claw as long as rest of ^ ,-,,,. 

 toe. 



1. Bill as long as the head. Hind claw longer 



* .han rest of toe ...... Telmntodytea. 



2. Bill shorter than the head. Hind claw 



eqnal to the rest of the toe .... Cistothorus. 



Thryollinrtis. 

 Thryomanes. 



TTyletnnthrous. 

 Trcjloflytes. 



'"■.*. 



-.'i 



\, 



HELEODTTES, Cabanis. 

 Heleodytes, Cab. Mus. Hein. I, l!-50, 80. (Type Furnarius grisetis, Sw.) 



Bill longer than head, without notch oi rictal bristles. Nostrils broadly 

 oval, in the anterior extremity of nasal groove, bordered behind by a nake I 

 membrane as in Donacohiu.t. Commissure curved gently, not angulated ; 

 gonys straight. Wings about length of tail. First primary considerably 

 more than half the longest ; second longer than ■secondaries. Tail moderately 

 graduated ; outer feather about five-sixths the middle ; outer web of exterior 

 feather about one-third the inner. Tarsi scarcely longer than the middle toe. 



Colors plain, without dark spots or bars. 



»., ! 





K-^SS 



