38 



GYLDENSTOLPE, BIRDS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION TO SIAM. 



larger. The sides of the body, flanks and upper part of abdomen are more tinged 

 with bluish in the males than in the males of Hypothymis azurea azurea and the 

 crissum is also not pure white but faintly washed with bluish grey. The black 

 occipital patch is rather large and the axillaries more greyish than white, sometimes 

 even bluish and the black collar on foreneck usually larger. 



Hypothymis azurea prophata is said by Oberholser to inhabit the Malay Penin- 

 sula north to Lower Siarn and some of the Malayan Islands. 



Another allied form Hypothymis azurea coeruleocephala Sykes. which is also 

 similar to Hypothymis azurea azurea Bodd. but larger and with the posterior lower 

 parts of the male rather more extensively white and with the upper surface lighter 

 and less purplish blue, is said by Oberholser to be found in India north to the 

 Himalayas and east in Burma to Pegu, Tenasserim, Cochin China and Hainan. 



According to this it seems that the Siamese form would more probably belong 

 to Hypothymis azurea coeruleocephala Sykes. but after a careful examination of my 

 specimens from Northern Siam I have come to the conclusion that the Siamese 

 birds must be referred to Hypothymis azurea prophata. 



Oberholser has measured 18 males and 19 females of Hypothymis azurea pro- 

 phata and 2 males and 3 females of Hypothymis azurea coeruleocephala and to com- 

 pare these with the measurements taken on my specimens I will also give them 

 below. 



Hypothymis azurea prophata. 



18 ^ 



Wing =66,5—72,5 mm. 

 Tail - 63,5—72,5 » 

 Ckilmen = 9,5 — 12,5 » 

 Tarsus = 14,5 — 16,5 » 



Hypothymis azurea cceruleocephala . 



2 ^ 



Wing --70 —72 mm. 

 Tail =69,5—71 » 

 Culmen=-10 —10,5 » 

 Tarsus =- 15,5 — 16 » 



HyjJothymis azurea prophata. 



19 ? 



Wing -=64 — 70 mm. 

 Tail =62 -71,5 » 

 Culmen = 10 —11,5 » 

 Tarsus =14,5—16,6 » 



Hypothymis azurea coeruleocephala. 



3 ? 



Wing =68 —72 mm. 

 Tail =69,5—74,5 » 

 Culmen = 10,5 — 12,5 » 

 Tarsus =14—17 » 



Measures taken on specimens from Siam. 



^ ^2 12 Dcii Cliai. 

 Length = 145 mm. 

 Wing =71 » 

 Tail =71 » 

 Culmen = 11 

 Tarsus = 14,5 » 



^ "/a 12 Lang lluc Ilom. 



Length = ? 

 Wing =69 mm. 

 Tail = 73 » 

 Culmen =11 » 

 Tarsus = 14,5 » 



$ 23/, 12. Bång Huc Honi. 

 Length =150 mm. 

 Wing = 66 » 

 Tail = 64 -> 

 C-iilmen = 11,5 

 Tarsus = 14 » 



