82 JOim^ATu JSATUUAL HIST. SOCIETY OF SLIM. Vol. I. 



-f-10 (332). Dicrurus leucogenys. 7V/e ]\7iite- checked 



Drongo. 



Siamese, "un a^H^ ILIiQ d im (Nok seng seo si t'hno). 



Descripiion. Length, nearly 279 mm. ( 11 in. ). Whole upper 

 plumage grey, except the forehead, the ends of the first 5 or 6 

 primaries, and the shafts of the wing and tail feathers, which 

 are black. Lores, and sides of head, white. L )\ver plumage, pale 

 grey, the under tail-coverts whitish. The tail is forked to the 

 extent of about 38 mm. ( H in. ). In young birds, the giey of 

 the plumage is darker, and the white of the cheeks duller and 

 smaller in extent. 



Iris, reddish brown to crimson lake. Bill and legs, black. 



In the Siamese name, the words si tliao mean "ash- 

 coloured " — a quite appropriate term. 



IlahiU, etc. Very similar to those of the preceding species. 

 1 have only found this bird here from October to Februar}', and it 

 appears to occur ratlier sparingly. 



TUsinhuiion. Occurs also in Tratig ( Robinson and Kloss ). 

 This bird is not recorded b}^ Gyldenstolpe, so its northern limits are 

 imknown. 



-f-11 (310). Dissemurus paradiseus. TJie Larger liachet- 

 t ailed Drongo. 

 Siamese, nn LLIJO lIllQ Vn^ IJQ'1 ( Nok seng seo hang buang. ) 



Description. Length, about 482 mm. ( 19 in. ), t of which the 

 outer tail-feathers account for 305 mm. (12 in. ). Whole j^lumage 

 black, largeh' glossed with blue. The under tail-coverts, as well as the 

 under wing-coverts, are frequently tipped with white. 



Iris, red in adults, brown in the young ( Gates ). Bill, r.nd 

 legs, black. 



The outer pair of tail-feaHiers of this bird are \evy striking — 

 being produced beyond the end of the tail for aboiit 152 mm. (G in.), of 

 which the basal half is practically nothing but shaft, while the fermi- 



t This is the !('iii;lh of oTie of my birds. Tiie longer of Gykloiistolpe's 

 two specimens measured only i'lb luin. or about 16.75 in. 



