216 Mr. C. Boden Kloss on Birds [Ibis, 



grey (intermediate between " mouse-grey " and " neutral- 

 grey ^0^ ear-coverts dusky-brown with pale shaft-stripes; 

 and the feathers above and behind the eye dusky-brown and 

 albescent ; the back, from mantle to tail-coverts, is deep 

 tawny ; and the rufescent edges to the secondaries, tertiaries, 

 and wing-coverts (except those of the primary coverts) are 

 much less broad than in the Burmese birds. The outermost 

 tail-feather is white^ narrowly dusky along the dark shaft, the 

 dusky colour expanding into an oblong patch near the tip ; 

 the next feather is dusky, merely tipped and edged with white, 

 most broadly on the inner web; the remaining feathers are 

 dusky-black with pale tips, which decrease in size towards the 

 centre pair. The throat and sides of neck are almost white, 

 but the rest of the under surface is suffused with tawny, 

 deepest on the flanks. There is a large patch of white on 

 the underside of the wing and a white speculum on the 

 primaries. The younger birds are very similar, but the heads 

 are spotted with albescent, the breasts are banded and the 

 two outer tail-feathers are rufescent dusky only, edged with 

 white. Specimens from northern Siam, apparently similar to 

 mine, have been recorded by Gyldenstolpe as L. collurioides. 



If Hume is correct as to the changes which L. collurioides 

 undergoes through life, the above material illustrates very 

 perfectly the gradations in colour which take place between 

 youth and age. 



Most ornithologists seem agreed that L. hypoleucus 

 ("Tenasserim ") is the same as L. collurioides ("Pegu''), 

 but Gyldenstolpe regards it as sufficiently distinct to have 

 a subspecies of its own. 



DiCiEIDiE. 



i— "h 112. Dicseum cruentatum siamensis, subsp. nov. 



1 (^ ad., I ? ad. Lat Bua Kao. 



2 $ ad., 1 ? ad. Koh Lak. 

 Iris dark; bill and feet black. 



Males : T. L. 90, 88, 88; W. 47-5, 47, 46 ; B. f. g. 11, 11, 

 11-3. 



Females : T. L. 88, 90 ; W. 43, 44-5 ; B. f. g. 11, 11-2. 



