4. ARA. 151 



Macrocercus, subgen. Ararauna, Bp. Rev. et Mag. de T 7P e - 



Zool. 1854, p. 149 A. ararauna. 



Macrocercus, subgen. Aracanga, Bp. Rev. et Mag. de 



Zool. 1854, p. 149 A. macao. 



Primolius, Bp. Compt. Rend. xliv. p. 596 (1857) A. auricollis. 



Paranus, Rajinq. (errore), G. R. Gr. Hand-list, ii. p. 144 

 (1870). 



Ranr/e. From Mexico to South America as far as Bolivia and 

 Paraguay. 



Key to the Species. 

 a. Lower back, rump, upper and under tail-coverts 

 blue. 

 a'. General colour not green. 



a". Upper parts blue, underparts yellow. 



a'". Throat black ararauna, p. 152- 



b'". Throat <*reen caninde, p. 153. 



b". Upper and under parts red. 



c'". Cheeks and lores naked ; larger, wing 

 15-15"5 inches ; nape red. 

 a 1 . Cheeks with no feathered lines ; ge- 

 neral colour vermilion-red ; middle 



wing-coverts chrome-yellow macao, p. 154. 



b*. Cheeks with feathered lines ; general 

 colour darker red or crimson, the 



middle wing-coverts gr.>en chloroptera, p. 156. 



d"'. Cheeks naked ; lores partly feathered ; 



wing 11 inches ; nape yellow tricolor, p. 157. 



b'. General colour green. 



c". Lower back, rump, and upper tail-coverts 

 light blue. 

 e". General colour greener; lower back, 

 rump, and upper tail-coverts brighter 



blue ; smaller, wing 14 inches militaris, p. 158. 



/'". General green colour yellower ; lower 



back, rump, and upper tail-coverts 



paler blue ; larger, wing 16 inches . . ambigua, p. 160. 



d". Lower back, rump, and upper tail-coverts 



green ; wing 12"3-6'5 inches. 



g'". A red long patch behind the ears; tail 



green, bluish towards the end rubrigena, p. 161. 



A'". No red patch behind the ears. 



c*. Tail above brown-red towards the 

 base. 

 a 5 . Quills and tail-feathers dark red 



below seoera, p. 161. 



6 5 . Quills and tail-feathers golden 

 olive below. 

 a 6 . No yellow colour on the hind 

 neck. 

 a 7 . Forehead rose-red ; a red patch 

 on the lower back, and an- 

 other on the middle of the 



abdomen maracana, p. 163. 



b~. No red colour on the forehead 



and no red patches couloni, p. 164. 



b r \ A yellow collar on the hind neck, aurieolits, p. 165. 



