1918.] recently collected m Siam. 227 



"f 137. Buchanga atra longus (Bp.). 



Dicrurus longus Bp. Consp. Av. i. 1850^ p. 352. 



2 ? ad. Tachin, Central Siam. Oct. 1916. 



1 c? ad.j 1 c? subad., 1 ? imra. Koli Lak. 



Iris crimson or brown ; bill and feet black. 



Females: T. L. — — ; T. 158, 156; W. 129, 128; 

 Ta. 20, 19-5; B. f. g. 22-5, — . 



Males: T. L. 284, 275; T. 157, 146; W. 128, 125; 

 Ta. 20, 20 ; B. f . g. 24, 23-5. 



1 have compared these birds with examples from Java, and 

 think they must be ranked with the form occurring in that 

 island ; the bills appear to be a little smaller, but not suffi- 

 ciently so to justify separation — at any rate, on the material 

 available. 



It is interesting to note that while the Siamese birds are the 

 same as those of Java the Burmese are, judging by Oates's 

 description (^ Birds of Burma,' i. p. 218), indistinguishable 

 from D. a. atra of southern India, examples of which are 

 before me, and from which longus is only separable on 

 account of its somewhat shorter wing (129 mm. against 

 143 mm.) and the absence of any white rictal spot. 



Siamese birds do not need reference to the larger race 

 albirictis Hodgs., from the Himalayas, nor to cacoetha 

 Swinh., of southern China, as the last-named differs at a 

 glance from Indian forms through having a larger, more 

 powerful bill but shorter wings [fide Hartert, Nov. Zool. 

 xviii. p. 249). 



f- 138. Buchanga leucophaBa (VieilL). 



Buchanga cinerea niouhoti Walden, Ann. & Mag. Nat. Hist. 

 (4) v. 1870, p. 220. 



2 c? subad. Lat Bua Kao. 

 1 ? ad. Koh Lak. 



Iris (males) hazel and orange, (female) crimson ; bill and 

 feet black. 



Males: T. L. 272, 277; W. 129, 136. 

 Female: T. L. 285; W. 138, 



