48(i BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



M[)ii(Allta] i'[«mt] borealis Coves, Key N. Am. Birds, 2d ed., 1884, 290. 



[Mniolilla varia'] b. borealis Kidgway, Orn. Illinois, i, 1889, 117. 



[Mniotilta varia.] Var. longlrodris B.\ird, Rep. Pacific R. R. Surv., ix, 1858, p. 



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

 Var. Mniotilla longirostris Baird, Cat. N. Am. Birds, 1859, no. 167«. 



Genus HELINAIA Audubon. 



Helinaia^ Audubon, Synopsis Birds Am., 1839, 67. (lype, by elimination, Sijlria 



sivainsonii Audubon. ) 

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

 Helon.ra (emendation) Newtox, Proc. Zool. Soc. Lond., 1879, 552. 



Rather small, plainly colored MniotilicUe, with the bill nearly as lon^,^ 

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

 and ridged between nostrils; coloration plain brownish above, whitish 

 or pale dull yellowish l^eneath. 



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

 culmen straight from base to tip, narrowed and distinctly i-idged and 

 elevated between nostrils; maxillary tomium without subterminal 

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

 nostril to tip of maxilla. Nasal fossa? large and broad, chiefly occupied 

 by the broad operculum overhanging the k)ngitudinally oval or sul)- 

 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 emarginate or double-rounded, the rectrices very 

 broad, with tips subacuminate. Tarsus decidedly 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. — A])ove 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. 



Widljieat/jni — Sul)-arl)oreal. 



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

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



HELINAIA SWAINSONII Audubon. 

 SWAINSONS WARBLER. 



Adults {scxi.s allh). — Pileum plain ])rown (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 e'Aos, a swamp, and vaioo, to inhabit. 



