TROCHALOPTERUM. 



The eggs of David's Laughing-Thrush are elliptical in shape, with 

 a slight amount of gloss, and of a pale unspotted blue colour. They 

 measure 1-08 by -78 and 1-05 by ■7& inch respectively. 



2. Koko-Nor {Tnng Museum). Crowley Bequest. 



Genus TROCHALOPTERUM, Blyth. 



Troclialopterum variegatum (Vig,). 

 (Plate III. fig. 19.) 



Trochalopterum variegatum, Sharps, Cat. Birds B. M. vii. p. 859 (1883) ; 

 Oates, Fauna Brit. Ind., Birds, i. p. 95 (1889) ; id. ed. Sume, Nests 

 ^ Eggs Ind. Birds, i. p. 59 (1889) ; Sharpe, Hand-l. iv. p. 6 (1903). 



The eggs of the Eastern Variegated Laughing-Thrush are of an 

 oval form, and they possess a considerable amount of gloss. The 

 ground is of a greenish-blue colour, and this is speckled and spotted 

 with reddish and yellowish brown, of varying degrees of intensity. 

 In some eggs the markings are spread all over the shell, but are 

 most numerous at the thick end ; in others the markings are re- 

 stricted to one or two large spots and a very few specks, and these 

 are so dark as to appear to be of a black colour. The eggs vary 

 from 1 to 1*15 in length, and from '76 to "82 in breadth. 



2. Kotegarh, Himalayas, 30th April. Hume Ooll. 

 2. Kotegarh, 22nd June. Hume Ooll. 



2. Kotegarh, 22nd June. Hume CuU. 



Trochalopterum erytliroceplialum (Vig.). 



Troohalopterum erythrocephalum, Sharpe, Cat. Birds B. M. vii. p. 363 

 (1883) ; Oates, Fauna Brit. Ind., Birds, i. p. 89 (1889) ; id. ed. 

 Hume, Nests ^ Eqqs Ind. Birds, i. p. 55 (1889) ; Nehrh. Kat. 

 Eiersamml. p. 58 (1899) ; Sharpe, Hand-l. iv. p. 6 (1903). 



The eggs of the Eed-headed Laughing-Thrush do not differ from 

 those of T. variegatum. They measure from 1-14 to 1-21 in length, 

 and from '81 to -85 in breadth. 



1. Kotegarh, Himalayas, 22nd June. Hume Coll. 



1. Simla. Hume Coll. 



2. Simla, June. Hume Coll. 



1, Naini Tal, 4th June. Crowley Bequest. 



Trochalopterum nigrimentum, Uodgs. 



Trochalopteron chrysopterum, Jerd. Birds Ind. ii. p. 43 (1863). 

 Trochalopterum chrysopterum, Sharpe, Cat. Birds B. M. vii. p. 362 



(1883) ; Nehrk. Kat. Eiersamml. p. 58 (1899). 

 Trochalopterum nigrimentum, Oates, Fauna Brit. Ind., Birds, i. p. 91 



(1889) ; id. ed. Hume, Nests §■ Eggs Ind. Birds, i. p. 57 (1889) ; 



Sharpe, Hand-l. iv. p. 6 (1903). 



The eggs of the Western Yellow- winged Laughing-Thrush closely 



