27. GYMNOCEPHALITS. 401 



*' ad ^ l- ad ' ' J ' ? C ° Sta RICa " °" SalTin ' ES<1, [ P, l 



*■ ? »d. sk. Costa Rica. Purchased. 



«. c? ad. sk. Cordillera de Tole", Veragua Salvin-Godman Coll. 



(Arce). 



m. <$ ad. sk. Calovevora, Veragua {Arce). Salvin-Godman Coll. 



n. J ad. sk. Calovevora, Veragua (Arce). J. Gould, Esq. 



27. GYMNOCEPHALUS. 



Gynmoceplialus, Geoffroij St.-Hilaire, Ann. du Mils. xiii. ^ 

 P-237(1809) G.calvus. 



In general structure this form is not very remote from Cephalo- 

 pterus, but is immediately distinguishable by its denuded head, which 

 occurs to a greater or less extent in both sexes. So far as we yet 

 know, Gymnoceplialus is restricted to the Guianas. 



1. Gymnocephalus calvus. 



Choucas ckauve de Cayenne, Daub. PI. JEnl. 521. 



Corvus calvus, Gm. S. N. i. p. 372 ; Lath. Lid. Orn. i. p. 153. 



Gymnocephalus capucinus, Geoffr. Ann. Mm. xiii. p. 237; Less 

 Tr. d'Orn. i. p. 359, pi. 41. fig. 1. 



Coracina gymnocephala, Vieill. Enc. Meth. p. 770. 



Ampelis calva, Licht. Doubl. p. 56. 



Coracina calva, Temm. Tail. Meth. p. 20. 



Gymnocephalus calvus, Halm, Vog. am Asien, Lief. ii. pi. 4 ; Cab. in 

 Schomb. Guian. iii. p. 690 ; Bp. Consp. i. p. 178 ; Burm. Syst. Ueb 

 ii. p. 423 ; Cab. et Hein. Mus. Hein. ii. p. 109 ; Scl. Cat. A B 

 p. 258; Pelz. Orn. Bras. p. 135 ; Scl. et Salv. P. Z. S. 1867, p. 581 

 (L. Amazons); iid. Nomencl. p. 59; Salv. Ibis, 1885, p. 306 

 (Br. Guiana). 



Bald Crow, Lath. G. If. iii. p. 14. 



Above clear yellowish brown, lighter at the back of the head ; 

 front and whole summit of the head denuded, leaving only slight 

 black bristles ; wings and tail black : beneath similar, but abdomen 

 passing into chesnut rufous ; under wing-coverts white ; chin slightly 

 denuded ; bill and feet black : whole length 14 inches, wing 

 8-5, tail 4. Female similar but smaller, and head not so much 

 denuded. 



Hah. Cayenne, Surinam, and Guiana. 



«, b. S ad. st. Cayenne. Purchased. 



c.Ad.sk. French Guiana (Rothery). Salvin-Godman Coll. 



d. Ad. sk. Cayenne. Sclater Coll. 



e. Ad. sk. Cayenne. Salvin-Godman Coll. 

 /. Ad. sk. Cayenne. J. Gould, Esq. 



y. Ad. sk. Maroni r., Surinam (Kappler). Salvin-Godman Coll. 



/(, i. cJ ad. sk. Bartica Grove, Brit. Guiana Salvin-Godman Coll". 



(Mniitely). 



j. Ad. sk. Camacusa, Brit, Guiana Salvin-Godman Coll 



(Whitely). 



k. 2 ad. sk. Roraima, Brit. Guiana ( Whitely). Salvin-Godman Coll. 



I. Ad. sk. Guiana (Broivn). Sclater Coll. 



vol. xiv. 2 D 



