. Bulletin of the British Ornithologists' Club. Vol. 86 104 Bulletin Distribution of pink-throated (open squares) and blue-throated (solid dots) males of Colibri amethystinus. Shaded areas indicate probable regions of fairly continuous suitable habitat, those in eastern Mexico and Guatemala being occupied exclusively by pink-throated males. 183 (cf. Micrastur, supra), 7 Dec. 1964; netted, and prepared by Juan Nava S. Measurements of types: (respectively) length 124, 122; extent 163— (wings moulting); wing 65—; tail , mm. Material examined: 22 $ 6 ?. Remarks: I perceive no stru
. Bulletin of the British Ornithologists' Club. Vol. 86 104 Bulletin Distribution of pink-throated (open squares) and blue-throated (solid dots) males of Colibri amethystinus. Shaded areas indicate probable regions of fairly continuous suitable habitat, those in eastern Mexico and Guatemala being occupied exclusively by pink-throated males. 183 (cf. Micrastur, supra), 7 Dec. 1964; netted, and prepared by Juan Nava S. Measurements of types: (respectively) length 124, 122; extent 163— (wings moulting); wing 65—; tail , mm. Material examined: 22 $ 6 ?. Remarks: I perceive no structural difference between "Lampornis" auct. and Colibri, though these genera are widely separated in recent lists (Peters, 1945; Friedmann et ah, 1950; Eisenmann, 1955; etc.). The darkish western pink-throated race usually called brevirostris (Ridgway), 1908: San Sebastian, Jalisco, ranges all the way east to south- western Veracruz, where I took a $ at Puerto del Aire (north of Tehuacan, Puebla), and to northern Oaxaca (LSU). I know of no recent records for either of Swainson's putative type localities; if Bullock was mistaken in his recollection of these, he may have taken the types on the Michoacan —Mexico border, whence I have seen "brevirostris". It is known that he collected west to the present Morelia, Michoacan, where he secured Myioborus miniatus and Ergaticus ruber. Whatever their actual provenence, it seems clear that Swainson's birds were mostly or entirely "brevirostris", which is thus a synonym of amethystinus, having nothing whatever to do with the bluish-throated margaritae despite Blake's statement (1950) that separation of these two "is indefensible". The pale race of north-eastern Mexico, on the mountains fronting the Gulf of Mexico, should now be called henricus (Lesson and De Lattre), 1839: Coatepec, near Xalapa. It differs from all others in the paler gorget and underparts and in the pale brownish tinge
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