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EXPLANATION OF TERMS 



USED IN DESCRIBING THE OUTER FORMS OF BIRDS. 



A. Alulu. 



B. Auriculars. 



C. Crissum or lower tail coverts. 



D. Commissure.. 



E. Culmen. 



R Interscapulars. 



G. Iris. 



H. Jugulum. 



I. Lores. 



J. Mandible. 



K. Nape. 



L. Occiput. 



M. Orbit. 



N. Primary quills or primaries. \ 



0. Secondary quills or secondaries. vRemiges. 

 P. Tertiary quills or tertiaries. j 



Q. Pileum. 



R. Rictus. 



S. Lesser wing coverts. "^ 



T. Middle wing coverts. v Secondary coverts. 



U. Greater wing coverts. ) 



V. Primary coverts. 



W. Tibia. 



X. Tarsus. 



Y. Tail feathers or Rectrices. 



Z. Upper tail coverts. 



1. Scapulars. 



2. Unguis or Claw. 



3. Maxilla. 



