436 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



M[niotilta] vlaria} horealis Codes, Key N. Am. Birds, 2d ed., 1884, 290. 



IMniolilta varict] b. borealis Ridgway, Orn. Illinois, i, 1889, 117. 



[Mniotilta varia.} Var. longiroslris Baird, Rep. Pacific R. R. Surv., ix, 1858, p. 



xxxi, no. 167, in text (Cape Florida; see p. 236, in text). 

 Var. Mniotilta longiroslm Baird, Cat. N. Am. Birds, 1859, no. 167a. 



Genus HELINAIA Audubon. 



Helinaia^ Audubon, Synopsis Birds Am. , 1839, 67. (Type, by elimination, Sylvia 



swainaonii Audubon. ) 

 Helonaea (emendation) Agassiz, Nom. Zool., Ind. Univ., 1846, 175, 176. 

 Helonsea (emendation) Newton, Proc. Zool. Soc. Lond., 1879, 552. 



Rather small, plainly colored Mniotilidse, with the bill nearly as long 

 as head, straight, compressed, and with the oulmen distinctly elevated 

 and ridged between nostrils; coloration plain brownish above, whitish 

 or pale dull yellowish beneath. 



Bill nearly as long as head, narrowly wedge-shaped, compressed; 

 oulmen straight from base to tip, narrowed and distinctly ridged and 

 elevated between nostrils; maxillary tomium without subterminal 

 notch; gonys very faintly convex basally, shorter than distance from 

 nostril to tip of maxilla. Nasal f ossse large and broad, chiefly occupied 

 by the broad operculum overhanging the longitudinally oval or sub- 

 cuneate nostril. Rictal bristles obsolete. Wing moderate, rather 

 pointed (ninth, eighth, and seventh primaries longest and nearly equal, 

 but ninth slighty shorter than seventh); wing-tip slightly shorter than 

 tarsus. Tail shorter than distance from bend of wing to tips of sec- 

 ondaries, slightly emai'ginate or double-rounded, the rectrices very 

 broad, with tips subacuminate. Tarsus decidedlj' longer than com- 

 missure, more than one-fourth as long as wing, its scutella rather dis- 

 tinct; middle toe with claw about equal to tarsus; basal phalanx of 

 middle toe united for more than half its length to outer toe, for about 

 half its length to inner toe. 



Coloration. — Above plain brown, more olive on back, scapulars, and 

 rump; beneath, white or very pale yellowish, shaded laterally with 

 olive-grayish ; a white or pale yellowish superciliary stripe and a dusky 

 spot in front of eye. 



Nidification — Sub-arboreal. 



Range. — Humid division of Lower Austral life-zone (Austroriparian 

 Province), south in winter to Jamaica. (Monotypic.) 



HELINAIA SWAINSONII Audubon. 

 SWAINSON'S WARBLER. 



Adults {sexes alike). — Pileum plain brown (varying from deep hair 

 brown or olive-brown to mummy brown), sometimes with an indistinct 

 median streak of paler, or indication of one; back, scapulars, rump, 



'Name from i'/los, a swamp, and vaioa, to inhabit. 



