314 SPOLIA ZEYLANICA. 
(6) Length about 26; dorsal and breast plumes in 
breeding season, but no crest ; tarsus about 4°5. 
H. intermedia (Smaller Egret). 
(c) Length about 25; dorsal and breast plumes and 
crest in breeding season ; tarsus about 4 ; bill 4. 
H. garzetia (Little Egret). 
B.—Plumage white ; head and neck buff in breeding season ; 
naked part of tibia shorter than inner toe and claw ; 
bill 3 inches. 
Bubulcus coromandus (Cattle Egret). 
C.—Plumage white or slate-coloured ; naked part of tibia 
about same length as inner toe and claw; tarsus 
shorter than bill ; length about 25. 
Leptorodius asha (Reef Heron). 
D.—Wings, tail, and greater part of body white; back 
ashy-brown, maroon in breeding season; length 
about 18. 
Ardeola grayt (Pond Heron). 
111.—Size small or medium, 14 to 24 inches ; wings and tail 
not white. 
A.—Plumage dark throughout; 12 tail feathers ; bill 
slender, longer than tarsus ; length 18. 
Butorides javanica (Green Bittern). 
B.—Bill stout, longer than tarsus ; length 23; eyes red. 
Nycticorax griseus (Night Heron). 
C.—Bill stout, 2-5 inches long, shorter than tarsus ; length 
20. 
Gorsachius melanolophus (Malay Bittern). 
D.—Size small, about 15 inches ; bill slender, longer than 
tarsus ; plumage mainly yellow or chestnut. Genus 
Ardetia. 
(a) Wing quills black. 
A. sinensis (Chinese Bittern). 
(b) Wing quills chestnut. 
A. cinnamomea (Chestnut Bittern). 
