368 



U. S. p. R. R. EXP. AND SURVEYS ZOOLOGY — GENERAL REPORT. 



under parts being little if at all appreciable. There is, perhaps, a stronger tendency to bars on 

 the upper parts and sides. Whether these features should be considered as establishing a dis- 

 tinct species I am not prepared fully to admit, but adopt Audubon's name as a provisional one 

 for the western form. 



Audubon compares hi.s T. parkmanni with T. Jiyemalls. The differences are, however, very 

 great, and the comparison should be made much rather with aedon. 



List cf specimens. 



.TROGLODYTES AMERICANUS, Aud. 



Wood Wren. 



Troglodytes amtricnnus, AtTD.Orn. Biog. II, 18,34, ^O : V, 18:i9, 169 ; pi. 179.— Ib. Rirrfs Amcr. II, 1H4I, 123; pi. 119. 

 Troglodytes sylveslris, Gambel, I'r. A. N. Sc. Ill, 184b, 113, (actually refers to T. ;)aifcmanni,'lliuugli quoting Audu- 

 bon as above.) 



Sp. Cii. — Similar in size and color to tlie T, aedon; the bill shorter, tlio tail more graduated. Colors throughout much 

 darker ; no light line over the eye, but the sides of tlie bead and neck much like tbo crown. The lores and car coverts with 

 the shafts of the feathers scarcely hghter. Length, 4.50 ; wing, 2.00 ; tail, 1.85. 



Hub. — Eantern United States. 



If I am correct in the reference of No. 2951 to this supposed species of Mr. Audubon, it is 

 very similar to T. aedon, but appears to have a shorter and stouter bill. The size and propor- 

 tions are very nearly the same, thougli given by Audubon as con.siderably larger. The colors 

 generally are considerably darker, with very little reddish ; most distinct on the rump. There 

 is no light line over the eye ; in fact the sides of the head and neck are almost uniform brown, 

 with their upper parts being slightly relieved only by pale shafts to the car coverts, and perhaps 

 to the loral feathers. The under parts are considerably darker, the throat and breast almost 

 brownish ash, the middle of the belly only whitish. 



