ART. 4 BIRDS OF THE MENTAWI GROUP RILEY 21 



The specimens from the two islands do not seem to differ in any 

 way. The National Museum collection contains two males, one 

 female, and one unsexed example from North Pagi Island and one 

 male and two unsexed birds from South Pagi Island. These ap- 

 parently do not differ in color from the Siberut-Sipora series, but 

 the males apparently have a slightly longer yving. The nine males 

 from Siberut-Sipora have a Aving, 161-173.5 (average 166.5) ; three 

 males from the Pagi Islands, 175-180.5 (average 177.5) mm. This 

 difference, how^ever, might disappear with a larger series from the 

 latter locality. 



As Chason and Kloss have remarked -" aene'icmida has a differently 

 shaped nostril from erijthrognathus (type of the genus Urococcyx 

 Shelle}') , and horneensis has another style different from either. They 

 are all apparently closely related and it may be that the shape of the 

 nostril has no generic significance in these birds. 



CALYPTOMENA VIRIDIS SIEERU Chasen and Kloss 



CaJyptomcna viridis siberu Chasen and Kloss, Ibis, 1926, p. 285 (Siberut 

 Island). 



Two adult males and five immature males, Siberut. 



This appears to be a very good race. It is much darker, less yel- 

 lowish green than C v. continentis; it also appears to be somewhat 

 larger. One immature male from North Pagi and three females 

 from South Pagi in the National Museum probably belong to the 

 Siberut form ; they have longer wings than birds from the mainland. 

 I have been unable to compare C. v. sihej'u with C. v. viridis. of 

 Sumatra, as this form is not represented at present in the National 

 Museum. 



PITTA MOLUCCENSIS MOLUCCENSIS (P. L. S. Mnller) 



Tiirdus moluccensis P. L. S. Mullee, Xatursyst. Suppl., 1776, p. 144 



(Moluccas, error; Tenasserim). 

 Pitta hrachijura cyatwptera Chasen and Kloss, Ibis, 1926, p. 285. 



One unsexed bird, Sipora, Nov. 3. 



This specimen differs in the color of the rump from any I have 

 been able to examine from Sumatra and the mainland. In the 

 latter the rump is deep dull violaceous blue, while in the Sipora bird 

 it is Venetian blue. It does not differ in size from Sumatran speci- 

 mens, and the color of the rump may be aberrant, hence I hesitate 

 to name it. 



Pitta moluccensis lepta Oberholser ^° was founded upon two males 

 from Siaba Bay, Nias, and one female from Pulo Tuanku, Banjak 

 Islands. The only characters, given are smaller size, especially the 



2sibis, 1926, p. 285. 



50 Smiths. Misc. Coll., vol. 60, no. 7, 1912, p. 8. 



