CAPRIMULGI 



Nyctidromus albicollis , 



Caprimnlgiis curopcpus 



) n 



Chordcilcs tcxcnsis 

 Podargns Ciivicri . 

 Steatornis caripensis 



S.I. 



7-5 



10-5 

 9-5 

 7 



16 

 18-5 



18 



L.I. 

 1-4 



i iseca 



I-:?, 1-4 



1-6 

 1-75 



1-1, <) 



2 



1-25 



1-75 



The syrinx is highly characteristic in the Caprimulgi. 

 Like the nearly related (?) cuckoos, we have both the 

 tracheo-bronchial and the purely bronchial syrinx. In- 

 deed, the stages are almost identical in the two groups. 

 Cuculus and Caprimulgus correspond with a tracheo-bronchial 

 syrinx ; then we have Ceutropus and Podargns, and finally 

 the culmination in Crotophaga and 

 Steatornis of a syrinx furnished w T ith 

 a membrana tympaniformis, which 

 does not commence until many rings 

 below the bifurcation of the tube, 

 the intrinsic muscles being attached 

 to the first ring which borders upon 

 it. It will be necessary to describe 

 the various syringes in some detail ; 

 they have been studied and figured 

 by myself. l In N/jctidromus albicol- 

 lis, which will serve as a type of the 

 tracheo-bronchial syrinx which ex- FIG. 11:3. SYBINX OF Nycti- 

 ists in the Caprimulgidffi (.,), the gSSi )) . flZWcoBM (A 

 last four tracheal rings are closely 



applied in contradistinction to the preceding, which are 

 separated by copious membranous intervals. The last two 

 tracheal and the first five bronchial semi-rings are ossified. 

 To the first of the latter are attached the intrinsic muscles. 

 In Batrachostomus we have the intermediate type of syrinx, 

 which may, however, be called bronchial. The first six 

 bronchial semi-rings and the last three tracheal are ossified, 



1 ' On the Syrinx and other Points in the Anatomy of the Caprimulgidffi,' 

 P. Z. S. 1886, p. 147. 



