'.894. 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



373 



Measurements of type. — Length (skin), 3.90; wing, 2.22; tail, 1.62; 

 exi)Osed culnien, 0.70; tarsus, 0.()7; middle toe, 0.40. 



.■>. CENTKOl'US 1N8ULARIS, uew species. 



Specific characters. — Quite identical in nujjtial i)lum<ige with C. toidou 

 (Miiller) ; in other plumages, however, very much paler, the posterior 

 niider parts barred with pale brownisli buff and dnsky, in nearly equal 

 (juantity (uniform greenish dusky in correspon<ling' plumage of C. 

 toulon.) 



Habitat. — Aldabra and Assuiuption islands. (Type, No. 128715, U. 

 S.N.M., 9 ad., Aldabra, October, 1892. '■' Upper mandible, horny brown ; 

 lower pale horny; irides, red; feet, bluish black." (Ahbott, Mss.) 



Measurements vary so, both in this form and in C. ^o«7om, thati have 

 been unable to derive any satisfactory character from them. The pres- 

 ent bird appears, however, to have almost invariably smaller feet than 

 C. touiou, as the following measurements show: 



Measurements of Centropus ioulon. 



Measurements of Centro2)us insiilaris. 



U. S., 128717. 

 U.S., ',28714. 

 U.S., 128710. 

 U.S. ,128715. 

 U.S., 128712. 



d"ad... 

 9 ad... 

 rT ad... 

 9 ad-., 

 cfad... 



Aldabra 



...do 



...do 



...do 



Assumption , 



Ci. CAPRIMULGII8 ALDABEENSIS, new species. 



Specific characters. — Similar to G. Madagascar iensis., Grandidier, but 

 averaging larger; scapulars marked with grayish white instead of buff; 

 foreneck without collar of buify spots, and white of tail more extensive 

 (that on lateral feathers extending" 1.70 inches from tip in adult male). 



^ft&^^at— Aldabra Island. (Type No. 128668, U. S.N.M., $ ad., 

 Aldabra Island, September 29, 1892, Dr. W. L. Abbott.) 



Measurements of type. — Length (before skinning), 9,25; wing, 6.25; 

 tail, 4.35; middle toe, 0.65. 



