BIRDS FROM SIAM AND THE MALAY PENIISTSULA 407 



black plumage. One outer feather of the alula on the left wing, the 

 outer first primary on the right wing, and several outer secondaries 

 of both wings are all that remain of the immature plumage; the tail is 

 about half grown, but the outer feathers are far enough advanced to 

 show the pattern and to indicate that it is more or less intermediate 

 between saularis and erimelas, somewhat nearer the latter, however. 

 The fact is that many of the Tenasserim birds, apparently, are inter- 

 mediate and that the tail pattern becomes progressively blacker from 

 the north to the south of the bird's range. 



In Tenasserim the male has the exposed portion of the two outer 

 tail feathers white; the third outer tail feather a little over a third 

 black at the base, the black running down the inside web considerably 

 farther; the fourth feather with a small white spot. Specimens from 

 Singapore have the black on the third outer tail feather considerably 

 increased. I have examined only two males from Sumatra, the type 

 of C. s. ephalus Oberholser and a male from Loh Sidoh Bay. Appar- 

 ently they do not differ sufficiently from Malayan birds to warrant 

 recognition; the wings are a little longer than any measured from the 

 Malay Peninsula, 107 mm for the type and 108 mm for the other; 

 whether this difference would hold in a larger series is problematical. 

 This name was given to supplant Lanius musicus Raffles, claimed to 

 be a pure synonym of Gracvla saularis Linnaeus, but if the Peninsular 

 and Sumatran forms are the same, then C. s. erimelas is the name to 

 use for it, as they were both named in the same paper and the latter 

 has page priority. If the Sumatran race should prove to be separable, 

 then the name need not concern Siamese ornithologists. 



Four males from Tenasserim measure: Wmg, 95-104 (100.5); tail, 

 81-90 (84.8); culmen, 18-21 (19.9) mm. Three males from Trang: 

 Wing, 100-103 (101); tail, 86-90 (88); culmen, 19-20.5 (19.8) mm. 

 Four males from the Malay States (3) and Rhio Archipelago (1): 

 Wing, 98-104 (101.8); tail, 90-94 (92.7); culmen, 18-20 (19.2) mm. 



Specimens from southern Siam and southeastern Siam are inter- 

 mediate between saularis and erimelas but on the whole probably 

 nearer the former. For the present, therefore, the range of erimelas, 

 so far as can be told, is Tenasserim, south through Peninsular Siam 

 to the Malay States and some of the islands to the south of Singapore. 



KITTACINCLA MALABARICA INTERPOSITA Robinson and KIoss 



KUtacincla malabadca interposila Robinson and Ki.o.ss, Journ. Federated Malay 

 States Mus., vol. 10, no. 4, p. 262, Dec. 1922 (D ibsin, southern Annam). 



KUtacincla malaharica pellogyna Obekholser, Smithsonian Misc. Coll., vol. 76, 

 no. 6, p. 4, July 1923 (Bok Pyin, Tenasserim). 



Kitlacincla malaharica lamprogyna OBERHOiiSRK, ibid., p. 5 (St. Luke Island, 

 Mergui Archipelago). 



One male, Koh Lak, June 24, 1933; ten males, Pran, May 27-June 

 1, 1928, April 2-4, 1931; one female, Kwe Noi, Kanburi, September 



