/ 
Key to the Species. 
A. Upper-parts banded. 
a'. Larger ; fore-neck blue-grey without any bands. . G. humeraliSy p. 131. 
b'. Smaller ; neck all round narrowly barred with 
black and white G. placida, p. 133. 
B. Upper-surface uniform without bands. 
c'. Upper wing-coverts with small white spots . . G. cuneata, p. 135. 
130 
