16 Ridgwai/ — American Families of Oligomyodian Passeres. 



than the Cotingitlae of Dr. Sclater. Those genera of Cotingidae 

 possessing non-pycnaspidean tarsi present three recognizably 

 different types of scutellation of the planta tarsi; two of these 

 types approach most nearly to the holaspidean and taxaspidean, 

 l)Ut for the third, in which the whole planta tarsi consists of 

 smooth integument, I am unal)le to find a distinctive term. 



If certain genera (as Lipavgus, Casiornis, Lathria, and Attiki) 

 which by nearly universal usage are placed in the Cotingidae 

 really belong to that group, then most certainly do certain 

 genera usually referred to the Tjn-annidae also belong there, for 

 the character of the tarsal scutellation is essentially if not pre- 

 cisely similar. These genera, Sirgstes, Bamphotrigon,* and 

 Hylonax (type, Mginrchus valichis Gosse) I therefore add to the 

 Cotingidae, as well as others which possess essentiall3" pycnas- 

 pidean or at least non-exaspidean tarsi, namely, ^ ^ Pogonotriccus ' ' 

 zeledoni (type of genus Idiotriccus Ridgway), '' Elainea" or 

 " Mgiopagis " gaimardi (type of Elainopsis Ridgway), Tyrannv- 

 lus elatus, " Tyrannidus'' semijiavus (type of Microtriccus Ridg- 

 way), and Ornithion — possibly also Habrura. There should 

 also be added a supposedly Piprine genus, Ptilochloris (or Lanii- 

 soma), which has neither the exaspidean tarsus nor great syn- 

 dactylism of the Pipridae. At the same time, the exclusion from 

 Cotingidae and addition to Pipridae of the genus Aidia (or 

 Laniocera) is made necessary, since its foot-structure and tarsal 

 scutellation is typically Piprine. 



* Equals Rhynchocydua. part, of Dr. Sclater. Ramphotri(/onGrfiy, Cat. Gen. and Subgen. 

 Birds, 1855, 146, ex " Pr. B [onapartej 1854." (Type, Plalyrhynchus nificauda Spix.) 



