DESCRIPTIONS OF SOME NEW BIRDS COLLECTED ON THE 

 ISLANDS OF ALDABRA AND ASSUMPTION, NORTHWEST OF 

 MADAGASCAR, BY Dr. W. L. ABBOTT. 



BY 



Robert Ridgway. 



Curator of tJif Depnrtmcnf of Birds. 

 1. Ixocincla madagascarieusis lostrata subsj*. iiov. 



SUBSP. Char. — Similar to true I. madagascariensis, but larger, the 

 bill especially, and coloration j)aler. 



Hab. — Aldabra and Gloriosa islands. 



Type, No. 128,658, male ad., Aldabra Island, October 2, 1892 j Dr. 

 W. L. Abbott. Length (before skinning), Of inches; wing, 4.50; tail, 

 4.00; exposed culmen, 0.82; depth of bill through nostril, 0.28; tarsus, 

 0.86; middle toe, 0.65. " Bill orange-red, tip black ; feet fleshy brown." 

 (Abbott, MS.) 



2. Buchauga aldabrana sp. iiov. 



Sp. Char. — Differing from B. atraiu larger and more strongly hooked 

 bill, much longer nasal plumes (reaching halfway from nostrils to tip 

 of bill), much narrower rectrices, and in the very pale coloration of the 

 female. 



Adult male (type, No. 128,719, U. S. Nat. Mus., Aldabra Island, Oc- 

 tober 8,1892; Dr. W. L. Abbott): Entirely black, glossed with green- 

 ish blue, the remiges and rectrices much duller, more brownish, and 

 very faintly glossed. "Irides red, bill and feet black." Length (be- 

 fore skinning), 11.25; wing, 5.30; tail, 5.55; middle feathers, 4.20; cul- 

 men (from extreme base), 1.15; depth of bill through nostril, 0.38; 

 tarsus, 0.92; middle toe, 0.60. 



Adult female (No. 128,722, same locality and collector, October 2, 1892) : 

 Above dull slate-gray, the margins of the feathers on forehead and hind 

 neck and lower part of rump approaching grayish white; wing-coverts 

 dull greenish slate indistinctly edged with dull brownish white; remi- 

 ses and rectrices dull grayish brown, edged with ])aler. Under i)arts 

 .L^iayish white, tlie feathers of the breast, belly, etc., dusky grayisli be. 



Proceedings National Museum, Vol. XVI— No. 95.'J. 

 [Advance sheets of tliis pajjcr were* publisliod Augii.st. Ifl, 1893.] 



