NO. 1803. HYP0THYMI8 AND CYAN0NYMPHA—0BERH0L8ER. 



605 



Description. — Type, adult male, No. 179916, U.S.N.M.; Tana 

 Masa Island, Batu Islands, western Sumatra, February 17, 1903; 

 Dr. W. L. Abbott. Pileum intermediate in color between cobalt 

 blue and campanula blue; remainder of upper parts intermediate 

 between French blue and hyacinth blue; throat and breast between 

 smalt blue and ultramarine; a bar across the forehead at the base of 

 the bill, a very small chin spot, a crescentic occipital patch, and a 

 somewhat crescentic bar on jugulum velvet black; wings and tail 

 slate black, the wing-quills and rectrices broadly margined externally 

 with marine blue, the wing-coverts with the color of the back; pos- 

 terior lower parts white, the fore part of abdomen, the sides, flanks, 

 and crissum washed with blue, most heavily on abdomen, but slightly 

 on crissum; exterior under wing-coverts blue like the tliroat, the 

 rest of wing lining slate gray mixed with white; axillars grayish 

 white, somewhat washed with blue; thighs slate gray, heavily over- 

 laid with blue. 



Measurements. — Tliree males: Wing, 71-72 (average, 71.5); tail, 

 70-74 (average, 72.7); exposed culmen, 10.5-11 (average, 10.8); 

 tarsus, 15-16 (average, 15.5) mm. 



Type-locality. — Tana Masa Island, Batu Islands. 



Geographical distribution. — Batu Islands, western Sumatra. 



This new form is somewhat intermediate between Ilypothymis 

 azurea prophata, from Sumatra, and //. a. leucopMla " from the Pagi 

 Islands, but since it is easily recognizable and seems to be confined to 

 the Batu Islands, it is best separated subspecifically. The birds 

 from Tana Bala and Tana Masa islands are typical, but the single 

 adult male from Pulo Pinie is intermediate between this race and 

 H. a. prophata; but whether or not other specimens from the same 

 island would be identical remains to be seen. No females have been 

 examined. 



Measurements of specimens of Ilypothymis azurea ponera examined. 



o See page 607. 



6 Measured in the flesh by the collector. 



■ Type. 



