6388 Bulletin American Museum of Natural History. [Vol. XXXIV, 
question that the bird described by Vieillot (Nouv. Dict. d’ Hist. Nati TV, 
1816, p. 66) is the large, black-throated form of southern Brazil to which, 
furthermore, Dr. Allen in his description of sennett? (Bull. A. M. N. H., V, 
1893, p. 144) in a sense restricted Vieillot’s name. 
Other names which have been applied to this species are also applicable 
to the southern form for which, since it was first made known by Azara, 
Paraguay may well be considered the type region. 
Measurements of Adult Males. 
Name Place Wing ‘Tail Culmen 
Tachytriorchis a. sennettt San Patricio Co., Tex. 408 171 BY 
HY . . Corpus Christi, “ 405 vai 36.5 
fi 4 : - Bee Co., : 420 ~=—s-:174 36.5 
: : ie Tepic, Mexico 425 188 35 
2 “ exiguus Barrigon, Col. (Type) 395 151 32 
é 4 Maripa, Ven. 383 148 32 
e “ albicaudatus Matto Grosso, Brazil A418 175 32 
« « «“ « « “ 405 165 32 
Herpetotheres cachinnans fulvescens subsp. nov. 
Char. subsp.— Similar to H. c. cachinnans (Linn.) but smaller and more richly 
colored; the upperparts and wings externally darker (dark sepia); the underparts, 
crown, nape, upper’ tail-coverts and under wing-coverts nearly uniform cinnamon- 
buff, instead of white washed with light buff ; the crown more streaked, the lower 
wing-coverts more spotted. ; 
Type No. 182991, Am. Mus. Nat. Hist., 7 ad., Alto Bonito (alt. 1500 ft.), 
west slope, W. Andes, Antioquia, Colombia; Miller and Boyle. 
fange.— Tropical Zone of the Pacific coast of Colombia southward at least to 
Puna Island, Ecuador, northward through Panama possibly to Nicaragua. 
Remarks.— While my material clearly shows the existence of a well- 
marked, small, dark form of Herpetotheres in western Colombia and Ecuador, 
it by no means adequately represents the species as a whole. Three speci- 
mens in the Penard collection from Surinam, which Berlepsch (Nov. Zool., 
XV, 1908, p. 290) has designated the type-locality of true cachinnans, 
enables me to determine that all Colombian specimens from east of the 
Western Andes (Cauca Valley, Honda, Santa Marta, Villavicencio) are 
referable to that form, but in Central America the case becomes more 
complicated. 
Apparently the form for which I here propose the name fulvescens ex- 
tends northward to Panama (Canal Zone) whence we have two fairly typical 
specimens. Nicaragua and Honduras specimens show an increase in size 
