342 Bulletin American Museum of Natural History. [Vol. XXXVI, 



Valley and the Pacific coast north through Panama to Veragua, south to 

 Guayaquil. 



I provisionally place under the above name our twenty-two specimens 

 of this species. Among these two from the vicinity of Honda agree with 

 the figure of the type of radiatus in being bufly white below, but a third 

 specimen from near Honda is much more fulvous below, while one from 

 Puerto Berrio, but a short distance down the Magdalena from Honda, has 

 the underparts rich fulvous and agrees in color with specimens from Panama. 

 This type of coloration is also shown by Sclater's figure of a specimen from 

 Neche, and by the remaining birds in our series. 



Possibly the pale type of color may be restricted to the region about 

 Honda at the junction of the humid and arid Cauca-Magdalena fauna, 

 while birds of the fulvous type {Bucco fidvidus Salv. & Godm., Biol. Centr.- 

 Am. Aves, II, 1896, p. 514, Veragua) occupy the humid portion of this 

 fauna. I know of no similar case of distribution, however, and since the 

 recognition of fulvidus would require that one of our Honda specimens be 

 referred to that form, the other two to radiatus, I prefer for the present to 

 consider them as one form which possibly may be locally dichromatic. 

 Honda specimens average the smallest of the series. 



Barbacoas, 2; Puerto Valdivia, 7; Puerto Berrio, 1; Honda, 1; west of 

 Honda, 2. 



Measurements of Females. 



Wing Tail Bill 



(1631) Malacoptila fusca (Gmel). 

 Bucoofvscus Gmel., Syst. Nat., I, 1788, p. 408 (Cayenne). 



Found only in the Tropical Zone at the eastern base of the Eastern 

 Andes. Three specimens are more broadly streaked above and have the 

 abdomen more fulvous than a single one from Guiana. 



Andalucia (east slope, alt. 2000 ft.), 1; La Morelia, 2. 



(1635) Malacoptila mystacalis (Lafr.). 



Monasa mystacalis Lafr., Rev. et Mag., 1850, p. 215 ("Colombia''; I suggest 

 Valparaiso, Santa Marta Mts.). 



