390 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult feiiKile. — Pileum and hindneck dull grayish blue or greenish, 

 the forehead (sometimes crown also) usually narrowly streaked with 

 whitish; rest of upper parts plain dull grass green or parrot green; 

 lores brownish dusky; malar region blue or partly blue; chin and 

 throat buff; median under parts dull whitish, the chest streaked with 

 blue; sides and flanks plain grayish green; bill black; legs and feet 

 sage green in life,^ brownish in dried skins; length (skms), 93.5-103.1 

 (98.6); wing, 50.8-57.4 (54.6); tail, 25.4-30.5 (27.9); exposed culmen, 

 18.5-19.6 (19.1), tarsus, 14.7-15.7 (15); middle toe, 9.4-10.7 (10.4).' 



Young male. — Similar in coloration to the adult female. 



Immature male. — Variously intermediate in color between adult 

 male and female, according to age. 



Central America, from Guatemala (Choctum) to the Isthmus of 

 Panama (line of Panama Eailroad). 



Ccereba cieruLea (not Cerlhia cserulea Linnseus) Sclatee, Proc. Zool. Soc. Lond., 

 1856, 140 (Veragua). 



Ccereba lucida Sclatek and Salvin, Ibis, 1st ser., i, Jan., 1859, 14 (Guatemala); 

 Proc. Zool. Soc. Lond., 1864, 349 (Panama R. E.).— Moore, Proc. Zool. 

 Soc. Lond., 1859, 53 (Honduras).— Lawrence, Ann. Lye. N. Y., vii, 1861, 291, 

 318 (Panama R. R.).— Sclatbe, Cat. Am. Birds, 1862, 53 (Choctum, Vera 

 Paz, Guatemala); Cat. Birds Brit. Mus., xi, 1886, 35 (Choctum, Guatemala; 

 Bugaba, Veragua; Lion Hill, Panama R. R. ). — Cassin, Proc. Acad. Nat. 

 Sci. Phila., 1864, 267 (monogr.).— Salvin, Proc. Zool. Soc. Lond., 1867, 137 

 (David, Chiriqui); 1870, 185 (Bugaba, Veragua). — BoncARD, Llste Ois. 

 Guat., 1878, 32,— Salvin and Godman, Biol. Centr.-Am., Aves, i, 1883, 249. 



[Ccereba] lucida Gray, Hand-list, i, 1869, 117, no. 1453. — Sclater and Salvin, 

 Nom. Av. Neotr., 1873, 16. 



ArbelorMna lucida Heine and Reichenow, Nom. Mus. Hein., Orn., 1882, 60. — 

 Zeledon, An. Mus. Nac. Costa Rica, 1, 1887, 108 (San Jos6, Puerto Limon, 

 and Pozo Azul de Pirris). — Cheerie, Auk, ix, 1892 23 (San Jos6, Costa 

 Rica); Expl. Zool. Costa Rica, i, Aves, 1893, 17 (Boruca and T^rraba, s. w. 

 Costa Rica; crit.).— Richmond, Proc. U. S. Nat. Mus., xvi, 1893, 488 (Rio 

 Escondido, Nicaragua; habits; color of unfeathered parts, etc.). 



Cyanerpes lucidus Oberholser, Auk, xvi, Jan., 1899, 34 (synonymy; range). 



Genus DACNIS Cuvier. 



Dacnis Cuvier, Regne Anim., i, 1817, 395. (Type, MotadUa cayana Linnaeus.) 

 Cyanodacnis Cassin, Proc. Ac. Nat. Sci. Phila., xvi, Nov., 1864, 268. (Type, 



Motaoilla cayana Linnseus. ) 

 Polidacnis Cassin, Proc. Ac. Nat. Sci. Phila., xvi, Nov., 1864, 269. (Type, Dacnii 



angelica De Filippi. ) 

 Eudacnis Cassin, Proc. Ac. Nat. Sci. Phila., xvi, Nov., 1864, 270. (Type, Dacnis 



flaviveniris Lafresnaye and D'Orbigny. ) 



CcBrebidse with the bill shorter than the head, acute-conical or wedge- 

 shaped, very slightly decurved terminally (at least the maxilla), and tip 

 acute; tarsus not longer than middle toe with claw; adult males blue 



^Richmond, Proc. U. S. Nat, Mus., xvi, 1893, 488. 

 '' Four specimens. 



