422 I'ROCEEDINGIS OF THE NATIONAL MJJSEVM. 



TROGLODYTES. 



Bill rather stout, somewhat curved, and with no subtermiual notch; 

 angle of rami moderately acute; iiares rather tear-shaped, l)roa(lest 

 posteriorly, the superior membranes thickened; tail two-thirds to nine- 

 tenths of wing. 



ANORTHURA. 



Bill slend<>r and depressed, the culmen almost straight, tomia with 

 no subterniinal notch; nares narrow and slit-like, almost covered by 

 overhanging membranes, which are very slightly or not at all tliickened; 

 tail less than three-fourths of wing. 



'J'lie following review of Thri/omancfi has been based upon the examina- 

 tion of 378 specimens, rei)resenting very satisfactorily almost all the 

 forms treated. Althougli it may seem that the number of subspecies 

 admitted is excessive, yet all rest upon characters capable of dednilion. 

 In a word, the differences do exist, and it becomes simply the ([uestion 

 of h(>w far one should go in recognizing by name these geographical 

 variations. The result in the present case will be found to correspond 

 fairly well with the criterion already adopted for other wide-ranging 

 and plastic forms. 



Genus THRYOMANES Sclater. 



TIn-i/omaiics Sci.atick, C;it. Coll. Amer. BinlH, 18(!1, p. 22 (snhneiiiis). Type, 

 Trof/lodjitin hcirickii Andiiboii. 



Chars, (/en. — (lenus geiieri Thryothoro afhne, sed rostro debiliore et 

 (jonipiessiore, vix vel hand dentato; tarsis gracilioribus. 



Geographic (listribufion. — United States, north to Pennsylvania, 

 Minnesota, Colorado, and on Pacitic coast to British Columbia; south 

 to Lower Calif<»rnia, (iua(lalni)e Island, iSocorro Island, and on the 

 mainland of Mexico to Oaxaca. 



anai.vtk;ai. kky to tiik spkcies and subspecies ok thryomanks, haski) on 



ADITLT males. 



I. Largo, wing avcraginf; 57 luui. or more. 



A. Upper i)iirt8 reddish brown. 



a. Dark percnus. 



a' . Light cri/iUiis. 



B. [J])p(!r parts grayish brown. 



a. Paler, snjjcrciliary stripe narrower ercmnphUns. 



a' . Darker, superciliary stripe broader. 



h. l^argtT and dark<M' ...miirinus. 



V . Smaller and ])aler hairdi, 



II. Small, wing averaging less than ii5 mm. 



A. Exposed culmen usually 1.5 mm. or more. 



a. Tail brown, not Itroadly tipped with wliitisli insiilaris. 



a'. Tail black, broadly tipped with whitish. 



/'. Upper surface light grayish brown leucophrya. 



h' . Upper surface dark brown. 



c. Tail 49 mm. or more calophonua. 



c'. Tail 4.5 nmi. or less hrevicaudus. 



1 



