354 Mr. Swainson on several new groups in Ornithology. 



Familif Certhiadoe. 

 Sub-family Certhiana. 

 Cauda gradata^ rigida. 



DENDROPLEX. 



Rostrum rectissimum. 



Ala; mcdiocres^ rotundatcB ; remigibus 3'«'', 4'"', et b*^ longissimis. 



I know not whether the type of this genus has been described. 

 The living bird has all the manners of a Picas. Except in its 

 perfectly straight bill, it differs not from Dendrocolaptes. 



DENDROCOLAPTES. ///. 



Rostrum longiusculum ; sub-curvatum, mandibula superiore apice 

 emarginata, vel abnipte deflexa. 



Bill lengthened ; the upper mandible with the tip notched or 

 abruptly deflexed. 



The same uncertainty prevents me from being able to quote a 

 typical example of this group, as it is now restricted, although I 

 possess four species which clearly belong to it. 



XIPHORIIYNCIIUS. 



Rostrum gracile, elongatum, compressissimumy falcatum^ immar- 

 ginatum. 



Bill slender, long, much compressed, falcated and entire. 

 Type. Dend. procurvus. Temm., Pi. col. 28. 



By this form, the passage is marked from Dendrocolaptes to 

 Certhia. The species appear numerous. I possess four from 

 Brazil, and three from Mexico. 



OXYURUS. 



Rostrum mediocre, gracile, rectum^ compressutn, integrum ; cul- 

 mine leviter arcuato. 



