100 MESSRS. H. C. ROBINSON AND C. BODEN KLOSS ON 
65, CYANOPS MYSTACOPHANES AURANTIIFRONS, subsp. nov. 
Megalzma mystacophanes, Miiller, p. 75. 
Differs from all other forms of the species in having the fore- 
head orange, merging more gradually into the crimson of the occiput, 
not clear bright yellow sharply defined therefrom. 
T'ype. Adult male. Nong Kok, Ghirbi, Peninsular Siam. 3 
January 1918. 
Wing, 99; tail, 56; tarsus, 27; bill from gape, 42 mm. 
Specimens examined :— 
2¢ Nong Kok, Ghirbi, Peninsular Siam. 3—5 January 1918. 
3,3 imm. Pulau Sireh, near Junk Seylon. 14 February 
1918. 
W. 99,-99, 99,92 (imm.). 
We have compared with this series a male from the Bencoolen 
district of Sumatra (typical of the species ), 3 males (1 imm.) from 
Sarawak, typical of C. m. hwmit Marshall, which is very doubtfully 
distinct, and 11 adults from various parts of the Malay Peninsula, 
which also agree with the Sumatran birds but have been named 
C. quadricolor (Eyton, P. Z. S. 1839, p. 105; On Malaccan birds ). 
Miiller (loc. cit. supra ) has already noted the differences cited above. 
- 66. Méesopucco DUVAUCELI STUARTI, subsp. noy. 
Xantholema Duvaucelli, Miiller, p. 75. 
A form allied to M. d. cyanotis and, like it, with blue ear-coverts 
and a poorly developed black pectoral patch and pale red sub- 
ocular spot intermixed with yellow ; but post-auricular and post-malar 
spots deep red and the sizs noticeably smaller. 
Type. Adult male. Collected at Klong Tung Sai, Junk Seylon 
on 22 December, 1917. 
W. 78, 75,* 73; Tail, 49, 49," 49; Bill from gape, 24.5, 25.0,* 
24.5 mm. 
This is the bird which we have hitherto regarded as typical 
M. d, cyunotis (Blyth), which is not the case. Mesobucco duvauceli 
ortentalist Robinson, a larger bird with yet paler red areas on the 
head, is possibly. synonymous with the true M. d. cyanotis, a point 
* Type. 
ft Ibis 1915, p. 738. 
JOURN, NAT. HIST, SOC, SIAM. 
