358 KOP.TH AMERICAN BIRDS. 



(1.02), tarsus 1.58-1.C6 (1.60). Ilab. Southern Mexico 

 (Vera Cruz and southward). 



A. sieberii (Wagl.). Sieber's Jay.' 

 a'. Lower parts entirely uniform rich blue, like upper parts. 



Plumage entirely uniform rich azure-blue, except lores, which are deep 

 black, and under surface of wings and tail, which are dull black ; size of 

 A. sieberii. Ilab. llighlauds of Guatemala and southern Jlexico. 



A. unicolor (Du Bus). Unicolored Jay.' 



Genus XANTHOURA Boxaparte. (Page 351, pi. XCIX., fig. 3.) 



Species. 



Common Characters. — Adults uniform bright green above, becoming more 

 bluish toward tips of middle tail-feathers ; nasal tufts, triangular patch covering 

 anterior portion of malar region (reaching upward to e\-e), and whole top of head 

 (except anteriorly), rich campanula-blue; anterior part of lorohcad white, changing 

 gradually into blue of crown ; tail, except four middle feathers, pure primrose-yel- 

 low ; sides of head (except as described above), chin, throat, and chest, uniform deep 

 black, with abrupt semicircular outline against breast ; rest of under parts light 

 green or yellow. Yonng: Similar to adult, but colors duller, the blue of crown 

 tinged with green, white of forehead stained Avith, or replaced by, j-ellow, black of 

 head much duller, and lower parts pale creamy yellow. 



fl'. Lower parts pale verdigris-green, more or less tinged, especiallj- beneath sur- 

 face, with pale primrose-yellow; length 11.00-12.00, wing 4.40-4.S0, tail 5.10- 

 5.80. Nest in small, usually thorny, trees or in thickets. Eggs 3-5, 1.08 X 

 .80, pale buffer pale gra^-ish buff, thickly speckled with umber-brown. ITab. 

 Eastern Mexico, nortii to lower Eio Grande Valley in Texas, south to Vera 

 Cruz and Puelila 483. X. luxuosa (Less.). Green Jay. 



a}. Lower parts chiefly or entirely iM-inirose-yellow ; otherwise like X. lu.mtosa. 



Hab. Southern Mexico (Colinia, Tehuantepec, etc.), Yucatan, Guatemala, and 



Honduras. 



X. luxuosa cyanocapilla (C.\n.). Yellow-bellied Green Jay.' 



Genus PERISOREUS Bonai-akte. (Page 351, pi. XCVL, fig. 3.) 



Species. 



Common Characters. — Adults with forehead, nasal tufts, sides of head, throat, 

 and chest white, or whitish ; occiput (sometimes nearly- wiiole top of head) grayish, 

 dusky, or blackish ; upper parts uniform dusky grayish or brownish, the tail-feathers 



• Pica ticleni Waol., Syst. At. 1S27, Pica, sp. 2S. Aphflocomn tlcbcr! Cab., Mus. Hcin. i. 1851, 221. 



' Cyanocurax unicolor Du Bus, Bull. Ac. Roy. Brux. sW. ]>t. 2, 1847, 10.3. Aphelocoma unicolor Siiarpk, 

 Cat. B. Brit. Mus. iii. 1877, 118. 



^ Ci/anocitrax cynnocnpillni* Cab. in T?chu(li Faun.a Per. 18-41-16, 233. Xanthnrn ci/nnocapilla SnARPE, 

 Cat. B. Brit. Mus. iii. 1577, 131. 



