30 PROCEEDINGS OF THE NATIONAL MUSEUM vol 75 



CORVUS ENCA ENCA (Horsfleld) 



Fregilus enca Hobsfiexd, Traus. Linn: Soc. London, vol. 13, 1821, p. 164 



(Java). 

 Corvus enca enca Chasen and Kloss, Ibis, 1926, p. 293. 



Four males and five females, Sipora ; two females, Siberut. 



The above material has been compared with a male and female 

 from Java and I can find no difference between them. The United 

 States National Museum collection contains specimens of Corvus enca 

 compilator Richmond from Simalur and Nias and Biittikofer ^^ 

 records Corvus macrorJiynclius from the latter island also. 



DICRUROPSIS BORNEENSIS VIRmiNITENS Salvadori 



Dicruropsis inridinitens Salvadori, Ann. Mus. Civ. Storia Nat. Genova, ser. 



2, vol. 14, 1894, p. 593 (Sipora Island). 

 Dicrurus horneensis viridinitens Chasen and Kloss, Ibis, 1926, p. 293. 



Six males, three females, and one unsexed bird, Siberut ; five males, 

 four females, and one without sex, Sipora. 



A series of two males, five females, and one unsexed exampled col- 

 lected on South Pagi Island by Dr. W. L. Abbott, does not differ 

 essentially from the Siberut-Sipora series. Otherwise I have nothing 

 to add to Chasen and Kloss's remarks. 



DICRURUS LEUCOGENIS PERIOPHTHALMICUS (Salvadori) 



Buchanga periophthalmica Salxado^i, Ann. Mus. Civ. Storia Nat. Genova, 



ser. 2, vol. 14, 1894, p. 594 (Si Oban, Sipora). 

 Dicrurus leucogenis diporus Oberholser, Smith. Misc. Coll., vol. 60, no. 7, 



1912, p. 15 (North Pagi Id.). 



Five males, five females, and one gkin without sex, Sipora. 



This series has been compared with the type of D. I. diporus and 

 found to be practically identical, both as to coloration and size. The 

 latter was originally compared with D. I. leucogenis and D. I. stig- 

 matops, but not with D. I. periophthahnicus^ of which there were 

 probably no specimens in this country at that time. 



DICRURUS LEUCOGENIS SIBERU Chasen and Kloss 



Dicrurus leucogenis siheru Chasen and Kloss, Ibis, 1926, p. 294 (Siberut 

 Island). 



Eight males and three females, Siberut. 



The above series compared with D. I. periophthalmicus averages 

 darker above and below ; the white of the cheeks is somewhat reduced 

 in size ; the size is, however, hardly less. 



»« Notes Leyden Mus., vol. 18, 1896, p. 189. 



