BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 335 



Brewster), was supposed to have come aboard when we were oppo- 

 site Cape Mala, Panama, in the Gulf of Panama. 



EMPIDONAX EULERI (Cabanis) 



Empidochanes Etileri Cabanis, Jouru. fiir Oruith., 1868, p. 195. (Can- 

 tagallo, Rio de Janeiro, Brazil.) 



Of six skins attributed to this species, two males were taken at a 

 low hill 25 kilometers west of Puerto Pinasco, Para<i!:ua3\ September 

 1, 1920, a female at San Vicente, Uruguay, January 31, 1921, an- 

 other female at Lazcano, February 8, and a male at Rio Negro Feb- 

 ruary 14. All are adult. Specimens from Uruguay appear darker 

 and browner than those from the Paraguayan Chaco, due perhaps in 

 part to their more worn condition of plumage. The status and range 

 of this species are in considerable confusion in current literature, 

 as formerly euleri was supposed to occur only in Brazil. Lillo-^ 

 has said that, according to Hellmayr, the bird ranges into Argen- 

 tina, but it does not appear to have been recorded before from Uru- 

 guay. Eiyipidonax argentinus (Cabanis), of which Evifidonax 

 'brunneus Ridgway appears to be a synonym, is said to be smaller 

 than euleri^ and though sometimes considered a geographic race, on 

 the basis of one specimen seen (the type of hi'wmieus)^ appears 

 specifically distinct. The wing in euleri has the following measure- 

 ments: Males (4 specimens), 64.4—66.6 mm.; females (2 specimens), 

 60.5-62.8 mm. 



These small flycatchers frequented Ioav brush in heavy forest, 

 where the ground was densely shaded. Perches were chosen under 

 shadow of groAvths of leaves, where the birds remained motionless, 

 save for the rapidly twitching tail. In Uruguay they were fairly 

 common, especially in swampy localities. In addition to those re- 

 corded above, one preserved in alcohol was taken on September 30, 

 1920, on the eastern shore of the Paraguay River, opposite Puerto 

 Pinasco. 



MYIARCHUS TYRANNULUS TYRANNULUS (MuUer) 



Muscicapa Tyrannulus Muller, Natursyst., Suppl., 1776, p. 169. (Cayenne.) 



The present species, marked by broad, rufescent margins on the 

 inner webs of the rectrices, was collected only at Kilometer 25 and 

 Kilometer 80, west of Puerto Pinasco, Paraguay, where adult males 

 were secured September 1 and 11, 1920. In this region they were 

 fairly common in heavy forest, where they Avatched for insects or 

 hopped slowly about in the outer branches of tall trees. On Sep- 

 tember 15 seA^eral were found together, calling excitedly, apparently 

 engaged in mating. Their usual call resembles one of the notes of 

 NuttalJornis borealis, and in addition, they have a song, a rattling 



»Apunt. Hist. Nat., vol. 1, No. 3, Mar. 1, 1909, p. 42. 



