34 PROCEEDIXGS OF THE NATIONAL MUSEUM vol. 75 



This form is slightly smaller with a smaller bill than that from 

 the Mentawi Islands. The birds from Nias, Simalur, and Piilo Babi 

 measure as follows: 



Nias. Three adult males : Wing, 96-103 (99) ; tail, 62-62.5 (63.8) ; 

 culmen, 19. Four adult females: Wing, 97-104 (100) ; tail, 56-65.5 

 (60); culmen, 17-18 (17.6). 



Simalur. One adult male (type of rhadinorhynchus) : Wing, 

 101.5; tail, 60; culmen, 17.5. One adult female: Wing, 102.5; tail, 

 62 : culmen, 17.5. 



PuLO Babi. Two adult females: Wing, 102-104; tail, 62.5-64; 

 culmen, 17-18. 



(2) Lmiiprocorax panayensis pacMstorhinus Oberholser. 



Somewhat larger than altirosfrls, but less glossy and with a larger 

 bill. Apparently confined to the Mentawi Islands. 



Fourteen males measure: Wing, 102-113 (106.3): tail, 62-69.5 

 (65) ; culmen, 18.5-21.5 (19.8) ; and ten females, wing. 100-105 

 (102.4) ; tail, 61-67.5 (63) ; culmen, 17.5-20.5 (19.3). 



(3) Lamprocorax panayensis enganensis. 



Calornis enganensis Salvadori, Ann. Mus. Civ. Storia Nat. Gen., ser. 2, 

 vol. 12, 1892, p. 137 (Engano). 



Similar to pacMstorhinus^ but with a longer wing and tail; the 

 bill smaller and weaker. 



Five adult males measure: Wing, 112-114 (112.7); tail, 70-77 

 (72.9) ; culmen, 18-19 (18.3) ; and three adult females, wing, 105.5- 

 114 (109.5) ; tail, 67-74.5 (70.5) ; culmen, 18.5-19 (18.7). 



(4) Lamprocorax panayensis leptorrhynchus. 



Aplonis panayensis leptorrhynchus Stresemann, Nov. Zool., vol. 20, 1913, 

 p. 377 (Pulo Pini). 



Of this form the United States National Museum collection con- 

 tains no specimens, but from the measurements given by the de- 

 scriber it is as large or larger than enganensis. No length of culmen 

 is given, unfortunately. It must be a recognizable form, however, as 

 the measurements would indicate a larger bird than altirostns or 

 pachistorhiiws, and it could not very well be enganenms^ as the 

 .Mentawi form would come in between. 



MOTACILLA CINEREA CASPICA (S. G. Gmelin) 



Parus caspicus S. G. Gmelin, Reise d. Russlaiid, vol. 3, 1774. p. 104. pi. 20, 



fig. 2 (Enzeli or En.seli, Caspian Sea). 

 Motacilla cinerea caspica Chasen and Kloss, Ibis, 1926, p. 296. 



One male, one female, and one unsexed bird, Sipora, October 12-21. 



