IACHE. 319 



wing 2.00-2.30, tail 1.30-1.50, exposed culmen .65-.G8. Hab. Highlands of 



Guatemala and Mexico. 



B. leucotis ( VIEILL.). White-eared Hummingbird. 1 



GENUS IACHE ELLIOT. (Page 308, pi. XC., fig. 5.) 



Species. 



COMMON CHARACTERS. Adult males metallic grass-green above, the tail-feathers 

 blackish, with dull gray tips (broadest on middle feathers) ; downy thigh-tufts pure 

 white ; under tail-coverts whitish or light grayish, mixed with darker ; rest of 

 lower parts metallic green, bluish green, or blue ; bill pale brownish (red in life) on 

 basal portion, blackish at end. Adult females metallic grass-green above, pale gray- 

 ish beneath, the two exterior tail-feathers tipped with pale brownish gray, and all 

 with the basal half green. 



a 1 . Under tail-coverts in adult males white or grayish, with or without darker 



centres. 

 b l . Under tail-coverts whitish on margins, darker in centre ; upper tail-coverts 



blue or green. 



c 1 . Under tail-coverts white with dull gray centres in adult male, entirely 

 white in young. Adult male: Upper parts grass-green, sometimes in- 

 clining to bronzy green; chin and throat rich metallic blue, passing 

 gradually into rich green on breast and belly ; length about 3.50- 

 3.75, wing 2.00-2.20, tail 1.35-1.50 (forked for .25-.S5), culmen .75-.S5. 

 Adult female: Above grass-green, becoming dull gray on forehead; 

 lower parts uniform pale ash-gray ; basal half of tail, with whole 

 extent of its middle feathers, green, the two outer feathers tipped 

 with dull gray ; a whitish streak behind eye, with a dusky space 

 immediately beneath it and extending beneath eye ; length 3.88- 

 4.10, wing 2.00-2.15, tail 1.25-1.30 (forked for about .15), culmen 

 .78-.8S. Young male : Similar to adult female, but tail as in adult 

 male ; lower tail-coverts uniform white ; feathers of upper parts 

 margined with pale buif ; new feathers appearing on throat bluish 

 green (instead of blue, as in adult), becoming more bluish toward 

 chin. Young female : Similar to adult, but feathers of upper parts 

 bordered with pale buif. Hab. Western Mexico, south to Colima, 

 north to southern Arizona. 



441. I. latirostris (SWAINS.). Broad-billed Hummingbird. 



c 2 . Under tail-coverts entirely white in adult (?) male. Adult (?) male : 



Upper parts " reddish bronze" ; throat and upper parts of breast 



metallic bluish green ; under parts bronzy green with a coppery 



1 Trochilus leucotis VIEILL., Nouv. Diet. ed. 2, xxii. 1818, 428. Basilinna leucotis REICH., Aufz. der Colib. 

 1853, 13. 



