BIRDS OF NORTH AND MIDDLE AMERICA. 33 5 



CISSILOPHA YUCATANICA (Dubois). 

 YTJOATAN JAY. 



Adxilts {sexes alike). — Head, neck, and under parts uniform black, 

 the latter passing into dusky blue on under tail-coverts; upper parts 

 (except pileum and hindneck), bright cerulean or deep turquoise blue, 

 the tail deeper blue (approaching cobalt), and the tertials more greenish 

 (glaucous-blue or verditer blue); bill black; legs and feet yellow. 



Lii.mature. — Similar to adults, but bill yellow, rectrices (except middle 

 ones) more or less broadly tipped with white, and black of under parts 

 rather duller, with thighs and under tail-coverts more distinctly bluish. 



Adult male.— Length (skins), 310.5-326.5 (820.5); wing, 137-147.5 

 (141); tail, 134.5-150 (142.6); bill from nostril, 21-23 (22^5); depth 

 of bill at nostrils, 12-13 (12.5); tarsus, 40.5-43.5 (42); middle toe, 

 23.5-25.5 (24. 5). « 



Admit female.— Length (skins), 317.5-330 (325); wing, 137-143 

 (139.5); tail, 134.5-148.5 (141.5); bill from nostril, 21.5-23 (22.5); 

 depth of bill at nostrils, 12.5-13 (12.7); tarsus, 39.5-42 (41); middle 

 toe, 24-25.5 (25).* 



Yucatan (including Meco and Mugeres islands); British Honduras; 

 eastern Guatemala (Peten district) ; State of Tabasco (Frontera) south- 

 eastern Mexico. 



lOyanocitta] beachii (not Pica beecheii Vigors) Bonapaete, Consp. Av., i, 1850, 



378 (excl. syn.). 

 Corvus (Pica) beecfieii Eydoux and Geevais, Mag. de 2ool., 1836, pi. 72; Voy. 



"Favorite," 1839, pi. 20. 

 Cyanodita crassirosiris (not of Bonaparte) Pucheean, Rev. Zool., 1858, 196 (Old 



R., British Honduras). — Mooee, Proc. Zool. Soc. Lond., 1859, 57 (near Belize, 



British Honduras). — Salvin, Ibis, 1861, 353 (Guatemala; Belize, British Hon- 

 duras). — Laweence, Ann. Lye. N. Y., ix, 1869, 201 (Merida, Yucatan). 

 [Oyanocitta'] crassirostris Sclatee and Salvin, Nom. Av. Neotr., 1873, 39 (Belize, 



British Honduras; Yucatan). 

 [Cyanurus] crassirosiris Geay, Hand-list, ii, 1870, 5, no. 6103. 

 Oyanoritta yucatanica Dubois, Bull. Ac. Roy. Belg., 2^" ser., xl, no. 12, Dec, 



1875, 13, 16 (Yucatan; coll. Brussels Mus. ). — Salvin and Godman, Biol. 



Centr.-Am., Aves, i, 1887, pi. 35. 

 Xanthura yucatanica Shaepb, Cat. Birds Brit. Mus., iii, 1877, 133 ("Honduras"; 



Yucatan). 

 Oyanolyca yucatanica Salvin and Godman, Biol. Centr.-Am., Aves, i, 1887, 498 



(Meco and Mugeres islands, Yucatan; Old River, British Honduras). 

 Oissolopha yucatanica Stone, Proc. Ac. Nat. Sci. Phila., 1890, 208 (Shkolak, etc., 



Yucatan); 1891, 444.— Chapman, Bull. Am. Mus. N. H., viii, 1896, 282 



(Chichen-Itza, Yucatan; habits; crit. ). 

 Cyanocitia germana Sclatee and Salvin, Proc. Zool. Soc. Lond., Feb. 15, 1876, 



270 (Belize, British Honduras; coll. Salvin and Godman). 

 Corvus cimiciphagus Donde, La Emulacion, iii, no. 16, 1878, 13 (Yucatan). 



« Six specimens. !> Four specimens. 



