208 Mr. C. Boden Kloss on Birds [Ibis, 



Iris dark ; bill deep yellow, culmeii and nasal region 

 blackish; feet black. 



T.L. 310, 303; T. 114, 113; W, 163, 157; Ta. 52, 47-5; 

 B.f.g. 36, 37-5. 



The younger bird is less blue, lacks the glistening blue 

 tips of the feathers, and has mucli more black on the 

 maxilla. Mr. W. J. F. Williamson has lent me a male 

 from Pre, N. Siam, with the following measurements : — 

 T. 131 ; W. 173 ; Ta. 50; B.f.g. 40 mm. It only differs 

 from the Koh Lak adult (which could not be sexed, but is 

 possibly a female on account of its smaller size) in having 

 more black on the culraen and about the nostrils, in this 

 respect approaching ray immature specimen. 



I have no example of M. eugenii from Pegu with which to 

 compare these birds, but think they are undoubtedly of that 

 species. In contrast with a series of M. temmincki from Simla, 

 Dehra Dun, and South Shan States, I note one difference 

 which has not hitherto been emphasized * : in M. eugenii 

 (of Siam) the overlying colour of the plumage is blue, in 

 M. temmincki violet or purplish. Other differences are : — 



M. temmincki. M. eugenii. 



Bill shorter, narrower, shallower. 

 Maxilla blackish, the edge yellow 



broadening anteriorly. 

 Bright frontal area larger. 

 Shining tips of feathers more 



numerous. 

 Bright winpf-patch larger. 

 Generally some white spots on 



wing-coverts. 



Bill longer, broader, and deeper. 

 Maxilla yellow, only culmen and 



nasal region blackish. 

 Bright frontal area smaller. 

 Shining tips of feathers less 



numerous. 

 Bright wing-patch smaller t. 

 Apparently never white spots on 



wiug-coverts. 



The other continental forms of Myiophoneus, i. e. caeruleus 

 of China, insularis of Formosa, and horsfieldi of India, all 

 have black bills; while the races found in the Malay 

 Peninsula, dicrorhyjichus, robinsoni, and crassirostris (the 



* Hume remarks in the original description of M. eugenii, however, 

 " on the whole the bird is perhaps bluer and brighter " than temmincki. 



■\ Sharpe (Cat. Birds, vii. p. 6) says that M. evgenii has no bright 

 shoulder-spot, but this statement is not in agreement with accounts of 

 other writers, 



