14 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



Basileuterus fulmcauda semicervinus Heixmayr, Abhaiid. K. Bayerischen 

 Akad. Wiss., II Kl., vol. 22, 1906, p. 652, in text (crit.).— Hellmayk. 

 Nov. Zool., vol. 17, 1910, p. 265, part (localities in Colombia and Ecua- 

 dor) ; Pi"oc. Zoul. See. London, 1911, p. 1092 (.Juntas [Ilio Dagua], and 

 Rio Garrapata, Sipi, W. Columbia; Nanegal, Ecuador; refs.). — Chapman, 

 Bull. Amer. Mus. Nat. Hist., vol. 36, 1917, p. 553 (Colombian localities 

 and refs. ; W. Ecuador; crit.). — Hellmayb, Arch. f. Naturg., vol. 85, A, 

 1919, p. 7, in text (range; crit). — Griscom, Amer. Mus. Nov. No. 280, 1927, 

 p. 15 (crit.). 



Basileuterus fulmcauda ftilvicauda (not Muscicapa fulvicauda Spix) Chap- 

 man, Bull. Amer. Mus. Nat. Hist., vol. 36, 1917, p. 553 (Chicoral and 

 "BogotA," Colombia, crit.). 



Basileuterus fulvicaudus scmic^Hitus Chapman, Bull. Amer. Mus. Nat. 

 Hist., vol. 55, 1926, p. 603 (Ecuadorean localities and refs.; range). 



Description. — Above olive, passing into deep neutral gray on the 

 pileum; wings dusky, margined externally with brownish olive; 

 upper tail-coA'erts and basal two-thirds of tail rich buffy (between 

 antimony yellow and yellow ocher), the terminal portion dusky 

 brownish, often with a greenish cast, this dark area much reduced 

 on the outer pair of rectrices; transocular streak dusky grayish; 

 superciliaries and sides of head rich buffy, the latter with more or 

 less darker mottling; under parts strongly buffy, deepest on the 

 crissum; under Aving-coverts brownish buffy; " iris brown; bill black: 

 feet brownish yellow." Juvenal plumage : dull brownish olive above 

 and below (at least anteriorly) ; tail marked as in the adult. 



Measurements. — ]Male : Wing, 61-66 (average, 64) ; tail, 47-53 (49) ; 

 bill, 11.5-13 (12); tarsu.s, 21.5-23 (22.5). Female: Wing, 60-65 

 (63) ; tail, 46-49 (47) ; bill, 11.5; tarsus, 21.5-23 (22). 



Range. — Tropical Zone, from eastern Panama southward to west- 

 ern Ecuador, and ea.stward to include the Magdalena and Cauca 

 Valleys in Colombia. 



RemarJxS. — Xo. 66,858, collection Carnegie ]\Iuseum. Cordoba, 

 Colombia, May 29, is entering on the postjuvenal moult. It is de- 

 cidedly brown above, the pileum the same, and shows brown feathers 

 on the sides of the breast. 



Variation affects the depth and extent of the buffy wash below, but 

 it averages decidedly more than in P. fulvicauda., as shown by the 

 fine series examined. There is no geographical variation tliat I can 

 make out, Panama skins being exactly like those from western 

 Ecuador. Three skins from " Panama " in the Lawrence collection 

 (now in the American Museum of Natural History) I refer here 

 rather than to P. leucopygia veraguensis. These are doubtless the 

 same that are cited by Lawrence in the reference above quoted. 

 Either they came from the eastern part of that country, or else both 

 semic&i'vina and veraguerms occur in the Canal Zone, as mentioned 

 already. 



