288 BULLETIN 133, UNITED STATES NATIONAL MUSEUM 



STIGMATURA BUDYTOIDES INZONATA Wetmore and Peters 



Stigmatura budytoidos inzonata Wetmore and Peters, Proc. Biol. Soc. 

 Washington, vol. 36, May 1, 1923, p. 143. (Tapia, Tucuman.) 



The present race differs from jS. h. flavo-cinerea in the presence 

 of a white spot on the inner web of the outer tail feather, and by 

 the bright yellow of superciliary and underparts. S. h. hudytoides 

 has the white marking in the tail more extensive. It was fairly 

 common at Tapia, Tucuman, from April 9 to 13, 1921, where seven 

 skins preserved were collected on the following dates: Two males, 

 April 9 and 10, a female and one of unlaiown sex on April 11, a 

 male on April 12, a male and one with sex not determined on 

 April 13. The birds frequented dry, rather open forest of low 

 trees, with frequent clumps of thorny bushes, where they ranged 

 well under cover in pairs or little bands of three or four indi- 

 viduals. As they hopped about in search for food they jerked 

 and twitched the tail, frequently throwing it above the back, while 

 the wings were drooped, a mannerism that with their slender forms 

 gave them the appearance of gnatcatchers. In fact, as PolioptUa 

 dumicola was found in the same situations it was at times difficult 

 to distinguish readily between the two, when the birds were partly 

 concealed behind screens of branches. At intervals Stigmatura 

 emitted a series of sharp, explosive call notes in which two or more 

 joined, a medley that suggested the explosive calls of Tyr annus 

 verticalis. Save for these the birds would often have passed un- 

 noted in the scrub. Their flight was weak and tilting, and was 

 seldom pursued for any great distance. Specimens taken were in 

 various stages of molt. 



Mr. Ridgway ^^ calls attention to the resemblance of Stigmatura 

 (usually considered a tyrannid) to certain Formicariidae and sug- 

 gests that it may belong in that family. 



STIGMATURA BUDYTOIDES FLAVO-CINEREA Burmeister 



Phylloscartes flavo-cinereus Burmeister, Reise La Plata-Staaten, vol. 2, 

 1861, p. 455. (Valleys of Sierra Uspallata, Mendoza, Argentina.) 



S. h. flavo-cinerea is distinguished from the northern forms of the 

 species by the duller yellow of the undersurf ace and the white super- 

 ciliary. The two specimens that I have seen have no indication of a 

 white spot on the inner web of the outer rectrix. A specimen se- 

 cured by the Page expedition on the Rio Bermejo in March, 1860, is 

 intermediate between flavo-cin^erea and i7izonata of Tucuman, as it 

 has the dull breast of -fiavo-cinerea and the tail of inzonata^ while 

 the superciliary is very dull yellow. 



»9U. S. Nat. Mus., Bull. 50, vol. 4, 1907, p. 339. 



