48 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



occiput, hiiuliiock. and sides of nock oolden huff, changing from deep 

 orangc-l»urt' to oil given, according to inclination of the light; throat 

 cinnamon-rufous, usually separated from lilack of chin l)y a narrow 

 line of pale bluish; l)ack, scapulars, chest, and sides of breast uniform 

 deep black; lesser wing-coverts rich campanula l)lue, the middle cov- 

 erts ))right nile blue; rump glossy light l)luc (changing from nile blue 

 to turquoise); upper tail-coverts black, broadly margined Avith light 

 bluish green; wings (except lesser and middle coverts) black, the 

 greater coverts edged with light blue and greenish, the remiges and 

 rectrices with light yellowish green, more ])uffy on tertials; abdomen 

 and median portion of breast white; anal region and under tail-coverts 

 pale l)uff'y, tht^ latter Avith concealed central portion dusky; sides rich 

 campanula ))lue, passing into light greenish blue (turquoise or nile 

 ))lue) on flanks; bill black; legs and feet dusky (in dried skins); length 

 (skins), 110.8-132.1 (122.9); Aving, 68.1-72.6 (71. 1); tail, 45.7-50.8 

 (48.8); exposed culmen, 8.9-10.2 (9.7); depth of bill at base, 5.1-5.3 

 (5.1); tarsals, 16.3-18.5 (17.5); middle toe, 10.4-12.7 (11.7).' 



Ad id t female. — Very similar to the adult male and apparenth' not 

 always distinguishable, but usually slighth' duller in coloration; length 

 (skins), 116.8-132.1 (123.2); wing, 65.5-69.9 (67.8); tail, 45.2-49.5 

 (47.2); exposed culmen, 10.2; depth of bill at base, 5.1-5.6 (5.3); tar- 

 sus, 17-17.8 (17.3); middle toe, 10.4-11.4 (10.9).' 



Youmj .^ Ji I'd jdiniKKje. — Head and neck (except chin and throat) dull 

 light green (chromium green), each feather Avith a small central spot 

 of dusky; lores, eyelids, anterior portion of malar region, and chin 

 dusky; throat, median line of chest (narrowly), median portion of 

 breast, and abdomen dull whitish, slightly tinged with yellowish; a 

 patch on each side of chest and breast greenish dusky; sides dull gray- 

 ish, becoming more buffy on flanks; anal region and under tail-coverts 

 pale bufly; back dull dusky greenish, AA'ith a blackish patch on each 

 side; lower back and rump dull greenish; lesser wing-coverts dull, 

 light greenish blue; middle coverts dusky basally. dull light bluish 

 green terminally; rest of wings and tail dusky, Avith yelloAvish green 

 edgings. 



' Ten specimens, those from different areas averaging as follows: 



Locality. 



Wing. 



Tail. 



Exposed 

 culmen. 



Depth 

 of bill 



at 

 ba.se. 



Middle 

 toe. 



MALES. 



Four adult males from .southern Mexico 



Five adult males from Guatemala (some of doubt- 

 ful sex) 



One adult male from northern Honduras , 



70.6 

 71.6 



47.2 

 50.3 



9.9 

 9.9 



5.1 

 5.1 



17.8 

 18.3 



11.7 

 11.4 



^ Three specimens, all from southern Mexico. 



