366 



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



throughout with brown, (the color grayish on the under surface.) Beneath white, the sides, upper part of breast, and under 

 tail covers reddish brown. Upper parts, with the exceptions mentioned, reddish brown. Length, 4.50 ; wing, 1.75; tail, 1.75. 

 Hab. — Eastern United States to the Loup Fork of Piatte. 



The series before me is not sufficiently full to say if the sexes differ in color. The dusky bars 

 on the wing and tail are broad and conspicuous. The under tail coverts are faintly barred with 

 lighter. There are also obsolete streaks of wbitisli on the sides of the neck. The forehead is 

 brownish, not dusky. 



This species differs in its white streaks on the back from all other North American wrens, 

 excepting T. palustris. In this there are no streaks on the head or rump ; the tail is blacker, 

 the bill much longer, the size much larger every way. I have not yet seen any specimens from 

 the regions beyond the Missouri, except that collected by Lieut. Warren's expedition on the 

 Loup Fork of the Platte, probably near the eastern limit of the high central plains. 



List of specimens. 



TROGLODYTES, Vieillot. 



Troglodytes, "Vieillot, Ois. Am. Sept. II, 1807, 52, type T. ncdon. 



" Jlnortkura, Rennie, 1831 ;" (in Montague's Ornithological Dictionary?) T'y\>e JMulacilla troglodytes. 



The characters of this section will be found sufficiently indicated in the synopsis of the genera 

 on a preceding page. It comes nearest to Cistothorus, but is distinguished by weaker feet and 

 much smaller hind claws, which, instead of being equal to or longer than the remaining portion 

 of the toe, is decidedly shorter. 



The propriety of keeping the Troglodytes aedon in the same section with 2'. Jiyonalis may, 

 perhaps, be questioned, as the latter differs essentially in the slender and nearly straight liill, 

 and the very short tail, which is surpassed by the whole of the toes when outstretched. Tltese 

 differences I have indicated by the sections mentioned in the synopsis. 



Of the first section, Troglodijtes, there are possibly three species. Two of these have a ligliter 

 superciliary line ; one is the well known house wren, T. aedon. The other, its western repre- 

 sentative, differing in the grayer color, without any rufous beneath. Tlie third species, T. 

 americanus, has no superciliary stripe. 



In the second section, Anorlhura, there is but one species in this country, T. Injoaalis, closely 

 related, however, to the European T. parvulus. 



