° 1915 ] V0N Ihering, The Dendrocolaptidce. 153 



the nasal foramen is prolonged posteriorly present only a modifica- 

 tion of the common holorhinal type, and this condition should be 

 named pseudoschizorhinal according to Fiirb ringer. 



The variations in the palatine structure, moreover, are of no more 

 importance than those of the nasal foramen. 



2. The family Dendrocolaptidse is an entirely uniform and 

 natural one and there are no sufficient reasons for its subdivision 

 into two families. 



3. The morphological and biological characters to which I have 

 alluded offer usefid data for the systematic disposition of the 

 subfamilies and genera of the Dendrocolaptid?e. 



BIBLIOGRAPHY. 



(J. Beddard, Frank. The Structure and Classification of Birds. Lon- 

 don. 1898. 



II. Furbringer, Max. Untersuchungen zur Morphologie u. Systema- 

 tik der Voegel. Amsterdam. 1888. 



III. Garrod, A. H. On the Value in the Classification of a Similarity 



in the Anterior Margin of the Nasal Bones of Certain Birds. 

 Proc. Zool. Soc. London. 1873. pp. 33-38. 



IV. Ridgway, Robert. The Birds of North and Middle America. 



Part V. Washington; 1911 [p. 157, Furnariidae, p. 224, Dendro- 

 colaptida?]. 



EXPLANATION OF PLATES. 



Plate XI. 



Fig. 1. Sittasomus sylviellus (Temm.). X 2. 



Fig. 2. Anabazenops fuscus Vieill. X 2. 



Fig. 3. Dendroplex picus (Gm.). X 2. 



Fig. 4. Synallaxis spixi Scl. Nat. size. 



Plate XII. 



Fig. 1. Synallaxis spixi Scl. Nat. size. 



Fig. 2. Picolaptesfalcinellus (Cab. & Heine). X 2. \ 



Figs. 3 & 4. Batara cinerea (Vieill.). Nat. size. 



N = nostril, A = anterior, P = posterior. 



F.F. = frontal fontanelle. 



I.O. = interorbital part of frontal bone. 



