492 



BIRDS OF THE GALAPAGOS ARCTTTPELAGO—IilDGWAY. vol.xix. 



plumage. In fact, when examining Dr. Baur's specimens and compar- 

 ing them with examples of N. melanotis in corresponding condition, 

 tlie smaUer size, especially of the bill, of X parnilus seemed to be the 

 only positively distinctive character, apart from a general lighter col- 

 oration of the u])per ])arts find sides of the head. 



The two a<lults in the National Museum collection measure as fol 

 lows: Wing, 4.30-4.3"); tail, 4.()rj-4.3r); exi)osed culmen, ().7r>; tarsus, 

 1.45; middle toe, O.Sl. 



A young bird, in hist i)hiinage, T can distingnish IVoin the young of 

 N. melanotifi (nily by its smaller and straigliter bill. 



MeasHremenis of Xesomitnus jxirndiis. 



NESOMIMUS BAURI, Ridgway. 



(Plate LVI, fig. 4.) 



NesomimHs hanri, Ridgway, Proc. IT. S. Nat. Mus., XVII (No. 1007, Nov. 15, 1894), 

 \^. 3-57 (Tower Island, (ialapago.^ Archipelago; collection of Dr. G. Baur). 



Spccijic character.s. — Similar to N. personatus, liidgway, of Abingdon 

 Island, but much lighter colored above. Dimensions averaging less, 

 and flanks more narrowly streaked with dusky. Wing, 4..)0-4.4r); tail. 

 3.!>r>-4.;>(); exposed culmen, ().1).">-1; bill fioin rictus, l.lM-l. 27; tarsus. 

 1.2r)-l.;>5; middle toe, ().78-().<S5. (Ty])e in Dr. IJanr's collection, Sep- 

 tember 2, 1«91.) 



Rnn(/e. — (ialai)agos Archipelago: Tower Island (r>aur and Adams). 



In coloration of the upper parts this form resembles N. melanotic 

 much more than X. persojtatus ; otherwise, however, it is easily 

 distinguished, the bill being much larger (sometimes (juite as large as in 

 smaller billed examples of X.per,s<>)iati(fi), the light-colored tips to middle 

 wing-coveits much wider, white terminal spots of rectrices smaller and 

 differently shaped, and dusky streaks much narrower. 



Three specimens are in Dr. Baur's collection. 



NESOMIMUS BINDLOEI, Ridgway. 



Nesomimus hhidloei. IiiixiW.AY. Proc. U. S. Nat. Mus.. XVIT, (No. 1007. Nov, 15, 

 1894), p. 3.58 (Hindloc Island, Galapagos; collection of Dr. G. Baur). 



Specific characters. — Similar to X. hauri, liidgway, but smaller and 

 with i)ropoitionally longer tarsus; ear-coverts solidly black, tips to 

 lesser wing-coverts paler (usually nearly white on posterior row), and 



