CHLOROSTILBON. 963 
and other authorities®§ it 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. vit. p. 574°; 
Salv. Ibis, 1889, p. 366°; Cat. Birds Brit. Mus. xvi. p. 46%. 
Chlorostilbon caniveti, Salv. Ibis, 1885, p. 191 (nec Less.) °. 
C. auricipiti persimilis, sed paulo major, rostro longiore, colore viridi corporis et capite summo minus aureo ; 
caude rectricibus latioribus ut videtur differt. 
Q statura majore quoque differt. (Descr. maris et feminz ex Cozumel I., Yucatan. Mus. nostr.) 
Hab. Mexico, Mugeres and Holbox Is., off the coast of Yucatan (Gawmer), Cozumel I. 
(Devis®, Benedict 12, Gauwmer ?*). 
A close ally of C. auriceps and C. canivet?, 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. canivett 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. 87, 838’; Rev. Zool. 1839, p. 15. 
Sporadinus caniveti, Scl. P. Z. 8. 1859, p. 867°. 
Chlorostilbon caniveti, Gould, Mon. Troch. v. t. 351 (May 1860)*; Scl. & Salv. Ibis, 1859, p. 130° ; 
de Oca, La Nat. ili. p. 59°; Salv. Cat. Strickl. Coll. p. 3707; Cat. Birds Brit. Mus. xvi. 
p- 47°; Boucard, P.Z. 8. 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. 822”. 
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. 875°, 394. 
Chlorolampis salvini, Cab. & Heine, Mus. Hein. iii. p. 48%; Cab. J. f. Orn. 1863, p. 164%; Lawr. 
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 micante: subtus nitenti-viridis; cauda chalybeo-cerulea, rectricibus inter- 
