482 



niHDS OF THE GALAPAGOS ARCHIPELAGO- lUDCWAY. vol.xix 



absent from tlie northern part of Chatham Island, though observed 

 and collected by them in the southein ]>ortion. 



In addition to the islands inhabited by an identified species, there 

 are two which possess, or formerly possessed, forms not satisfactorily 

 determined. These are Barrington Island, upon which a N'esomimvs 

 was found to be common by Messrs. Baur and Adams — but their speci- 



ASCKRTAINED RANGK Or THK (IKNUS NKSOMIMfS, RIDGWAY. 



1. Xesomimiis trij'asciatits (Gould). 



2. Xesomimns maedonaldi, Ridgway. 



3. NesomlmuH adainsi, Ridgway. 



4. Xexomimiis j)ersonatit8, Ridgway. 



5. Xesomimiis melanotia (Gould). 



6. Xesomimus 2}fi'>'riilus (Gould). 



7. Xesomimus hauri, Ridgway. 



8. Nesomimus bindloci, Ridgway. 



9. (Undetermined form.) 



mens having been lost, the species is unknown — and Charles Island, 

 apon which Darwin found iV". trifasciatus and Kinberg what Professor 

 Sundevall identified as N. melanotis. Dr. Baur informs me that not a 

 single si)ecimen of Ifesominins could be discovered bj^ Mr. Adams and 

 himself on Charles Island; so it would seem that those which formerly 

 inhabited that island had become extinct. 



