NOVITATES ZOOLOGICAE XXIV, 1017. 419 



from castelnaudi by its considerably larger bill. 'Ihis is striking in a series from 

 Para which agree with those from Bahia. 



G. caslelruiiidi has been described from Peru and seems to extend to 

 Colombia. 



Specimens from Cayenne, the Orinoco Valley, British Guiana, and Surinam 

 are in no case typical cuneatus as they have smaller bills and a more uniform 

 and brighter rufescent throat. They are very closely aUied to castelnaudi, but 

 differ in having the breast and abdomen more brownish, not quite so dark, and 

 the throat generally more rufescent, the upper part of the throat being in many 

 specimens almost uniform rufous. The bill is generally less powerful, especially 

 if seen from below. We propose for this form the name : 



Glyphyrhynchus cuneatus simillimus subs p. nov. 



Type: (J Ipousin, Approuague River, Cayenne, 0. i. 1903. No. 13,020, Geo. K. 

 Cherrie coll. 



15. Xiphorhynchus nanus demonstratus subsp. nov. 



It has already been pointed out by Hellmayr and Seilern (Archiv /. Natvrg. 

 Ixxviii. pp. 110, 111, 1912) that specimens from Northern Venezuela differ from 

 typical Tianus from Panama. There is no doubt that this is the case, the ground- 

 colour of the crown being less black, the buff spots on the head and nape gener- 

 ally wider, the underside being more rusty yellowish. Hellmayr and Seilern 

 called attention to some other differences, which we cannot find to exist at all, 

 as they are quite variable, and to the smaller size of the North- Venezuelan birds. 

 This latter character is doubtful. Six Venezuelan males have the wings lOS-110 

 mm., two females 97 and 99, while Panama males have wings of 110-114, but 

 females 93-97 mm. 



Habitat of X. n. demonstratus : North-western Venezuela from Tocuyo to 

 Puerto Cabello. 



Type: S ad. San Esteban Valley, 11, xi. 1909, No. 2,823, S. M. Klages 

 coU. (In Tring Museum.) 



Mr. Hellmayr treats X. nanus as a subspecies of guttatus, but it is perhaps 

 safer to be a bit hesitating at present in grouping these forms. 



Bangs (Proc. Biol. Soc. Washington, xxiii. p, 72, 1910) described, appar- 

 ently from a single specimen (!)a X. rosenbergi iiom the Cauca Valley in Western 

 Colombia. We have from the same valley a specimen collected by the late 

 J. H. Batty, sexed "$" but with awing of 114 mm., so that it must be a 

 male! If this is the bird described by Bangs, then the description is rather 

 misleading, for it should not have been compared with the rather different 

 cMmchotambo, which has much more rounded scaly spots on the throat and 

 jugulum and a straighter bill. Our specimen from the Rio Cauca resembles 

 so closely the typical nana from Panama, that we are unable to state any 

 differences at all. 



Ridgway {Birds North awl Middle America, v. p. 251) extends the range 

 of naiM to Colombia, but does not mention Venezuela at all. 



