104 A COLLECTION OF BIRDS FROM X. E. SUMATRA. 



MUSCICAPIDAE. 



115. Alseonax latirostris (Baffles). 



Hartert, p. 213. 

 $ , 9 , Toentoengan, Deli, X. E. Sumatra. 5th January 



—1st February 1918 [Xos. 905, 965]/ 

 Wing, $ ,71; $ , 68 mm. 

 A common winter visitor. 



116. Cyornis unicolor infuscata, Hartert. 



Robinson and Kloss, p. 155. 

 $ , $ , Bandar Baroe, Deli, X. E. Sumatra. 7th— 10th 



June 1917 [Xos. 467, 480]. 

 Wing, 8 ,79; $,73 mm. 



Always very local and somewhat rare. Javan, Sumatran, 

 Bornean and Malayan birds present no tangible differences. 



117. Cyornis cantatrix(Temm.). 



Robinson and Kloss, p. 154. 

 $ , Tandjong Morawa, Serdang, X. 1&. Sumatra, 12th 



May 1917 [Xo. 362]. 

 Better known as Cyornis elegans (Teram.) over which 

 name this has slight priority. A rare bird everywhere except 

 apparently in Borneo from which island we have numerous 

 specimens. 



118. Cyornis vanheysti, sp. nov. 



A heavy-billed form, male plumage entirely blue, female 

 probably rufous olive with rufous brown chest and whitish 

 belly. 



Adult male. Above deep "indigo blue" (Ridgway) 

 rump and upper tail coverts and angle of the wing shining 

 sapphire blue ("Blanc's blue,' 7 Ridgway). Primaries and tail 

 feathers dusky black, edged with blue lightest on the tail, 

 frontal region and an indistinct supraocular stripe brighter 

 blue, lores black, ear coverts blackish blue. Throat pale in- 

 digo, breast dark sapphire blue, abdomen and tail coverts 

 whitish grey, flanks bluish grey, under wing coverts and axil- 

 laries dusky tipped with blue; thighs blue. "Iris dark, bill 

 black; feet plumbeous" (Van Heyst). 



Wing, 78; tail, 67; bill from gape, 22.5 (app.) ; tarsus, 

 18 mm. 



An immature male, changing into the adult plumage, has 

 the head fuscous, each feather with rufous centres; lores 

 dusky; frontal region, supercilium chin, throat, and upper 

 breast ferruginous; wing coverts dusky, broadly tipped with 

 ferruginous; quills dusky edged with pale ferruginous; ab- 

 domen white, flanks and under tail coverts pale ferruginous. 



Wing, 79 ; tail, 64 ; bill from gape, 21.5 ; tarsus, 18.5 mm. 



Jour. Straits Branch 



