CHLOEOSTILBON. 263 



and other authorities ^ » jt also occurs in the Valley of Mexico, where, however, it is 

 a rare bird. 



As a species, C. auriceps may be distinguished from C. caniveti by its deeply forked 

 tail, the outer feathers of which are narrow. The crown is rich golden green. 



2. Chlorostilbon forficatus. 



Chlorostilbon forficatus, Ridgway, Pr. Biol. Soc. Wash. iii. p. 23'; Pr. U. S. Nat. Mus. viii. p. 574^ 



Salv. Ibis, 1889, p. 366 ' ; Cat. Birds Brit. JIus. xvi. p. 46*. 

 Chlorostilbon caniveti, Salv. Ibis, 1885, p. 191 (aec Less.) '. 



C. aurieipiti persimilis, sed paulo major, rostro longiore, colore viridi corporis et capite summo minus aureo ; 



caudse rectricibus latioribus ut videtur differt. 

 $ statura majore quoque differt. (Descr. maris et feminae ex Cozumel I., Yucatan. Mus. nostr.) 



Hai. Mexico, Mugeres and Holbox Is., off the coast of Yucatan (Gaumer), Cozumel I. 

 {Devis ^, Benedict ^ ^, Gaum^r ^ ^). 



A close ally of C. auriceps and C. caniveti, but more like the former than the latter, 

 though in their geographical range the latter is interposed between the other two. As in 

 C. auriceps, the tail is deeply forked, but the lateral rectrices are wider ; the size, too, is 

 somewhat larger. The range of C. forficatus appears to be restricted to Cozumel Island 

 and some of the other islands situated off the north-east coast of Yucatan. We are not 

 quite certain if it occurs on the mainland immediately adjoining, as no collections of 

 birds have been made there ; but a little further to the westward at Tizimin and Merida 

 the true C. caniveti is found, and probably spreads to the north and east coasts, the 

 only physical barrier in that direction. * 



C. forficatus was first described by Mr. Ridgway from specimens collected by 

 Mr. Benedict ^ ^. Others were subsequently procured for us by Mr. Gaumer ^. 



3. Chlorostilbon caniveti. 



Ornismya caniveti. Less. Suppl. Ois.-Mouches, p. 174, tt. 37, 38 ' ; Rev. Zool. 1839, p. 15 '. 



Sporadinus caniveti, Scl. P. Z. S. 1859, p. 367'. 



Chlorostilbon caniveti, Gould, jNIoh. Troch. v. t. 351 (May 1860) ' ; Scl. & Salv. Ibis, 1859, p. 130 '' ; 



de Oca, La Nat. iii. p. 59'; Salv. Cat. Strickl. Coll. p. 370''; Cat. Birds Brit. Mus. xvi. 



p. 47' ; Boucard, P. Z. S. 1883, p. 451 '; Stone, Pr. Ac. Phil. 1890, p. 206 '°. 

 Chlorolampis caniveti, Lawr. Bull. U. S. Nat. Mus. no. 4, p. 33 "; Sumichrast, La Nat. v. p. 250 "; 



Herrera, La Nat. (2) i. p. 322 ". 

 Chlorostilbon osberti, Gould, P. Z. S. 1860, p. 309"; Mon. Troch. v. t. 354"; Salv. Ibis, 1860, 



p. 271 " ; 1866, p. 204" ; Nutting, Pr. U. S. Nat. Mus. vi. pp. 375 ^\ 394". 

 Chlorolampis salvini. Cab. & Heine, Mus. Hein. iii. p. 48'°; Cab. J. f. Orn. 1863, p. 164"; La^vr. 



Ann. Lye. N. Y. ix. p. 128". 

 Chlorostilbon salvini, Berl. Pr. U. S. Nat. Mus. xi. pp. 375", 394"; Zeledon, An. Mus. Nac. 



Costa Rica, 1887, p. 122 ". 

 Chlorostilbon osberti salvinii, Nutting, Pr. U. S. Nat. Mus. v. p. 501 ''. 

 Supra nitenti-aureo-viridis, pileo mieante : subtus nitenti-viridis ; cauda chalybeo-caeralea, rectricibus inter- 



