128 coKviu^. 



blue sliade ; rest of under surface of body deep smalt-blue, iuuluding 

 tbe imder tail- and wing-coTerts ; the lower series of the latter ashy 

 black, like the inner lining of the wing. Total length 9'0 inches, 

 culmen 1, wing 4-55. tail 4-75, tarsus 1-35. 

 Hah. Guatemala. 



a. Ad. sk. Guatemala. Purchased. 



b. Ad. sk. Cohan, Guatemala. Purchased. 



l(i. Cyanocorax argentigula. 



Cyanocitta argentig-ula, Laur. Ann. Lye. N. Y. xi. p. 88 ; Hcl. 1^- Salv. 

 P. Z. S. 1876, p."268. 



Female. The feathers of the front, lores, with those above and be- 

 low the eye, and of the chin are rigid and of an intense black ; 

 crown, hind neck, upper part of back, sides of neck, and the breast 

 black, lower part of back and rump of a dull deep blackish blue ; 

 the abdomen, sides, and under tail-coverts are also dull deep blue, 

 but brighter than the back, especially on the sides and under tail- 

 coverts ; on the front part of the crown is a crescentic mark of bluish 

 white, which becomes narrower along each side of the crown, and 

 extends over the ear-coverts as far as the occiput ; the feathers of 

 the crown are elongated, forming a short crest ; the throat is marked 

 with a sharply defined patch of silvery greyish white, with, just a 

 tinge of blue, and is in strong contrast with the black that surrounds 

 it ; this patch widens out a little at its lower extremity, which is on 

 the upper part of the breast ; the wings and exposed portions of the 

 quill-feathers are of a rich dark cobalt-blue ; the inner webs and 

 under surface of the quill-feathers are glossy black ; the tail above 

 is coloured like the wings, underneath it is glossy black ; bill and 

 feet black. Length 10| inches, wing 4f, tail 5^, bill 1, tarsus ly^^. 

 (^Lawrence.) 



Hub. Costa Eica, Salamanca. 



30. XANTHURA. 



lype. 



Xanthoura, Bp. Cotisp. i. p. 3S0 (1850) X. yncas. 



Cissolopha, Bp. t. c. p. 380 (1850) X. sanblasiana. 



Cyanolyca, Cab. Mns. Hein. i. p. 223 (1851) X. armillata. 



Xanthocitta, Cab. t. c. p. 223 (1851, ex Bp. MS.) X. yncaa. 



Range. Central and South America. 



Key to the Species. 



a. Outer tail-feathers yellow. 



a'. Hind part of the neck and crown of the head 



yellowish white yncas, p. 129. 



b'. Crown and nape bright cobalt. 



a". Breast and under tail-coverts bright yel- 

 low, without any shade of gi-een ; frontal 

 crest-plumes erect, and measuring 06 

 inch in lengfli ctrriihocrphalri, p. 130, 



