274 iNIr. C. II. B. Grant on 



in his private series, and Dr. Sclater for allowing me to 

 encroach on his time in the correction of the proofs. 



Vanellus grisescens Prazak. 



Through the kindness of Dr. Pteichenow I have recently 

 liad the loan of a typical specimen of this species obtained 

 in Paraguay ; this agrees with the large series from the 

 Argentine which are recorded in ' Tlie Ibis' for 1911, 

 p. 464, under the name of f'. cayennensis. 



When writing that paper I intended to name the Argentine 

 bird, but fortunately the description was not published. 



On again going through the series now in the Natioiial 

 Collection, some other differences, besides those described 

 by Dr. Prazak, are observable. 



The breast-baud of V. grisescens is washed with oily-green, 

 approaching V. diilensis in this respect ; the light edges to 

 the inner secondaries and tertials are exactly intermediate 

 between those of V. chilensis and V. caiiennensis, as also is 

 tlie extent of feathering on the tibia. 

 In size the bird is also intermediate. 



The geographical distribution of the three species appears 

 to be as follows : — 



V. chilensis. Central and Southern Chili to Southern 

 Patagonia. 



]\ grisescens. Northern Patagonia, Argentina, Uruguay, 

 and Paraguay across to Northern Chili. 



V. cayennensis. Brazil, Guiana, Colombia, Peru, and 

 probably the rest of the Northern States. 



As might be expected, some Northern specimens of 

 V. grisescens are very close to the true V. caye?mensis, but 

 typical forms are quite distinct. 



NoTHURA MACULOSA. (Tcxt-fig. 4, p. 275.) 

 On working out the collection for the purposes of the 

 paper mentioned above, I found no little difficulty in 

 distinguishing between the fully adult and immature birds 

 of this species. 



On close examination I find that a good distinction can 



