DIGLOSSA.—DACNIS, 243 
Colombian State of Antioquia, These are of a greenish-blue ground, thickly marked 
at the larger end with red-brown spots. The nest obtained by the same collector is 
open and made of moss, fibres, and rootlets, and lined at the bottom with moss. 
Of the nest and eggs of D. baritula and of D. plumbea we have as yet had no tidings. 
2. Diglossa plumbea. (Tab. XV. a. figg.1¢, 22.) 
Diglossa plumbea, Cab. J. f. Orn. 1860, p. 411’; Lawr. Ann. Lyc. N. Y. ix. p. 97°; v. Frantz, 
J. f. Orn. 1869, p. 297°; Salv. P. Z. 8. 1870, p. 1854; Sel. Ibis, 1875, p. 217°. 
Omnino schistacea, subtus pallidior, capite nigricantiore, uropygio carulescentiore ; rostro corneo, mandibule 
basi pallidiore; pedibus corylinis. Long. tota 4:4, ale 2-2, caude 1°75, rostri a rictu 0-55, tarsi 0-7. 
(Descr. maris ex Irazu, Costa Rica. Mus. nostr.) 
Q fusca; subtus pallidior, alis et cauda fusco limbatis. (Descr. femine ex Irazu, Costa Rica. Mus. nostr.) 
Hab. Costa Rica (v. Frantzius!), Irazu*, San Juan? *, Quebrada Honda? (v. Frantzius), 
Irazu (Rogers), Candelaria (Zeledon*); Panama, Volcan de Chiriqui (Arcé *). 
This Diglossa in Costa Rica and Panama entirely takes the place of the Mexican 
and Guatemalan D. baritula; but like that species it is confined to the high mountain- 
ranges and volcanoes. 
It was discovered by Dr. v. Frantzius, who sent a male specimen to the Berlin 
Museum, which was described by Dr. Cabanis in 18601. The same traveller subse- 
quently observed it in the Volcan de Irazu and near San Juan; and Mr. Zeledon also 
met with it at Las Cruces, in the mountain-range of La Candelaria®. Southwards of 
this our collector Enrique Arcé obtained several examples during his excursions to 
the southern slopes of the Volcan de Chiriqui. These differ in no way from Costa-Rica 
examples. Southward of Chiriqui Diglossa plumbea has not yet been met with. 
DACNIS. 
Dacnis, Cuvier, Régn. Anim. i. p. 395 (1817). (Type Motacilla cyana, Linn.) 
Thirteen or fourteen species are included in this genus, which is a purely Neotropical 
one, spread over the whole of the hotter parts of South America, and occurring in our 
region as far north as Nicaragua. Only four species, however, are found within our 
border, one of which, the common Dacnis cayana, has a range almost as extensive as 
that of the genus itself; D. uwltramarina is hardly separable from this, and has as yet 
only been noticed in Central America between Nicaragua and the State of Panama. 
The third is D. venusta, which for a long time was supposed to be peculiar to Costa 
Rica and Panama, but has now been traced into the northern provinces of Colombia. 
The fourth is that described below as D. viguiert, from the isthmus of Darien. The 
southern species are chiefly concentrated in the upper portion of the valley of the 
Amazons, and in States through which the Andes run. Two other species occur in 
Guiana and three in South-eastern Brazil. 
Dacnis may be recognized by its sharp, slightly depressed, almost conirostral bill. 
The nostril is at the lower portion of the membrane covering the nasal fossa; the 
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