124 



HIEUNDINID-S;. 



Key to the Species. 



a. Lower back and rump Hue. 

 «'. Head blue ; forehead rufous. 

 a". Throat intense rufous. 



a'". Larpjer ; winn- 4-5-4'8 inches : tail long in 

 full-grown birds, and reaching beyond the 

 tip of the wings ; under tail-coverts rufous 



or tinged with rufous rustica and allies, 



a. With a complete band of blue-black across [pp. 126, 127. 

 the fore neck, never broken through with 

 the rufous of the throat. 

 a . Underneath light rufous, or whitish 



tinged with rufous rustica, p. 128. 



/3'. Underneath deep chestnut saviffnii, p. 133. 



/3. With no complete band across the fore 



neck, the rid^ous of the throat descending 



and separating the blue-black colour into 



a half-crescent on each side. 



y'. Under surface white or slightly tinged 



with rufous gutttiralis, p. 134. 



8'. Under surface fawn-colour or cinnamon- 

 rufous ; the throat darker chestnut . . erythrogastra, 

 e'. Under surface deep rufous, almost as [p. 137. 



dark as the throat tytleri, p. 140. 



b'". Smaller; vring 4"15-4'2 inches: wing ex- 

 tending beyond the tips of tail ; no band on 

 the fore neck. 



«^. No white spots on the tail-feathers tahitica, p. 141. 



6*. Tail-feathers with white marks on the 

 inner web. 

 a'. Under tail-coverts smoky brovra. 



a". Spots on tail-feathers small and trans- I javanica, p. 142. 



verse ( neoxena, p. 144. 



h'^. Spots on tail-feathers very large and 

 occupying nearly half of the inner 



web angolensis, p. 145. 



¥. Under tail-coverts white lucida, p. 145. 



b". Throat white or pale buff' (young). 



c'". Larger ; wing 4'9 inches : with a distinct 



black prrepectoral collar cdhigularis, p. 146. 



d'". Smaller ; with the prgepectoral collar inter- 

 rupted in the centre (ethiopica, p. 146. 



b'. Entire head blue. 

 c". Belly white. 



e'". Secondaries externally white leucosoma, p. 147. 



f". Secondaries like the primaries dimidiata, p. 148. 



d'' . Belly blue like the back. 



g". Smaller; wing 43 inches: a white patch 



on the throat nigrifa, p. 148. 



h'''. Larger; wing 4'5 inches: throat blue 



like the rest of the under surface atrocceridea, p. 149. 



e". Entire under surface chestnut ; under tail- 

 coverts purplish blue nigrovvfa, p. 150. 



e'. Head rufous, forming a cap smithii, p. 150. 



h. Rump dusky ; head also dusl^ griseopyga, p. 152, 



