AEINIA.— CTANOMTIA. 287 



Abdomen and under tail-coverts pure white. Median pair of rectrices dark bronze-green ; next bronze- 

 green with black tip, remaining lateral feathers bronze-green at base, rest black, the bronze-green 

 decreasing in extent as it goes towards the external feather. All the lateral feathers edged with white at 

 their tips. Maxilla black; mandible flesh-colour, tip black. Feet black. Total length 3^ inches, 

 wing 2, tail 1^, culmen l^-i. 

 " Female. Differs in having the middle of the throat, breast, and underparts pure white. Median rectrices 

 bronzy green j lateral feathers green at base, then black, and tipped with grey. Eest like the male." 

 (Elliot, I. s. c") 



Rah. Costa Eica, Punta Arenas (Boucard ^ ^). 



This bird is only known from the types obtained by M. Boucard in 1876 at Punta 

 Arenas, the chief port on the Pacific coast of Costa Rica. 



b". Cauda uniformis, suhfurcata; pileus micans aut cyaneus aut purpureo-cyaneus, 



obscure viridis aut obscure cyaneus. 



CYANOMYIA. 



Cyanomyia, Bonaparte, Rev. Zool. 1854, p. 254; Salv. Cat. Birds Brit. Mus. xvi. p. 194. 

 Uranomitra, Cab. & Heine, Mus. Hein. iii. p. 41 (ex B.eicli.). 



Ckjanomyia contains eight or nine species, all but two of which are strictly confined 

 to the northern section of our region — the two exceptions belonging to the Andes of 

 Colombia and Peru. Of the northern species four or five are strictly confined to Mexico, 

 one (C. guatemalends) ranges from British Honduras to Nicaragua, and one is said to 

 belong to Honduras alone. 



In Cyanomyia the tail is slightly forked and uniform in colour, without any white at 

 the base of the lateral feathers. The crown in nearly all the species is glittering blue, 

 inclining to violet in some of them ; in others the fore part of the crown is very dark 

 dull green or dark dull indigo-blue. 



The genus naturally divides into two groups: in one the whole of the maxilla, except 

 the tip, is flesh-colour and the flanks are white ; all of the birds possessing these characters 

 are from Western or Central Mexico. The other group belongs to Eastern Mexico, and 

 Central America as far south as Nicaragua, and in it the maxilla is black and the 

 flanks shining green. The two Andean birds belong to this latter group. 



a. Maxilla [apex exceptus) carnea; hypochondrioe fere pure albcB. 

 a'. Pileus cyaneus aut purpureo-cyaneus micans. 

 1. Cyanomyia verticalis. 



Trochilus quadricolor, Vieill. Enc. Meth. p. 573^?? 



Aqyrtria /8. Uranomitra quadricolor, Reich. Aufz. d. Col. p. lO''. 



Cyanomyia quadricolor, Gould, Mon. Troch. v. t. 284 (May 1855) '; Scl. P. Z. S. 1859, p. 386* 

 Duges, La Nat. i. p. 141 " ; Villada, La Nat. ii. p. 362 ' ; de Oca, La Nat. iii. p. 209 '' 

 Lawr. Mem. Bost. Soc. N. H. ii. p. 292^; Boucard, Ann. Soc. Linn. Lyon, xx. p. 276' 

 Herrera, La Nat. (2) i. p. 322 "; Sanchez, An. Mus. Nac. Mex. i. p. 96". -• 



