DELATTRIA. 337 
4. Delattria sybille. (Tab. LIV. a. figg. 3, ¢; 4, 2.) 
Delattria sybille, Salv. & Godm. Ibis, 1892, p. 3277; Salv. Cat. Birds Brit. Mus. xvi. p. 664°. 
D. viridipallenti proxime affinis, sed pectore et hypochondriis viridibus gula concoloribus, dorso imo vix cupreo 
tincto, rectricibus lateralibus griseis facile distinguenda: rostro nigro. Long. tota circa 4:5, ale 2°6, 
caude rectr. med. 1°3, rectr. lat. 1-7, rostri a rictu 0°95. (Descr. maris exempl. typ. ex Matagalpa, 
Nicaragua. Mus. nostr.) 
Q supra mari similis, subtus alba, gula leviter cervino tincta, cervicis lateribus et hypochondriis viridi punc- 
tatis, rectricibus lateralibus griseo-albis fascia angusta indistincta subapicali fusca notatis. (Deser. 
femine ex San Rafael del Norte, Nicaragua. Mus. nostr.) 
Hab. Nicaracua, Matagalpa! 2, San Rafael del Norte (W. B. Richardson). 
Of this distinct species Mr. Richardson sent us in the first instance six adult males 
from Matagalpa, which place he visited in August 1891. During a second expedition 
to the same district in April and May of the following year he obtained examples of 
the young male and females at San Rafael del Norte, a place a short distance to the 
north-westward of Matagalpa, and nearer the Honduras frontier. 
Though clearly allied to D. viridipallens, this species has several points of distinc- 
tion. In the former bird the throat alone has green discal spots, whilst in D. sybzlle 
the green colour overspreads the whole under surface, leaving only the middle of the 
abdomen white. The tail, too, has the outer rectrices greyish white, the shafts alone 
being dark. 
5. Delattria hemileuca. (lab. LIV. figg. 3, ¢; 4, 2.) 
Oreopyra hemileuca, Salv. P. Z. 8. 1864, p. 584+; Lawr. Ann. Lye. N. Y. ix. p. 125°; v. Frantz. 
J. £. Orn. 1869, p. 316°; Muls. Hist. Nat. Ois.-Mouches, iv. p. 167, t. 118°; Boucard, 
P. Z. S. 1878, p. 69°. 
Ceeligena hemileuca, Elliot, Syn. Troch. p. 31°; Sharpe, in Gould’s Mon. Troch., Suppl. t. 5 (April 
1885) 7; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 121°. 
Delattria hemileuca, Salv. Cat. Birds Brit. Mus. xvi. p. 311’. 
Supra nitenti-viridis, capite summo et genis vix letioribus, rectricibus mediis cupreo tinctis ; stria postoculari 
elongata alba: subtus alba, gula media lete micanti-violacea, lateribus micanti-viridibus, hypochondriis 
viridi lavatis, tectricibus subcaudalibus albis medialiter pallide fuscis; rectricibus lateralibus griseo- 
viridibus, fascia subterminali obscura, apicibus pallidioribus: rostro nigro. Long. tota 4:0, ale 2-4, 
caudee 1°5, rostri a rictu 0°9. 
Q supra mari similis, capite summo dorso fere concolore: subtus gule plumis medialiter viridibus, plaga 
violacea nulla, caude rectricum apicibus latiore pallidis. (Descr. maris et femine exempl. typ. ex Turri- 
alba, Costa Rica. Mus. nostr.) 
Hab. Costa Rica (Endres, Zeledon, Alfaro in U. S. Nat. Mus.), Turrialba, Tucurriqui 
_(Arcé'), Candelaria and Rancho Redondo (v. Frantzius *), Naranjo de Cartagy 
(Boucard°, Zeledon *). 
Little is known of this well-marked species, the first specimens of which were sent 
us by our collector Enrique Arcé, by whom they were obtained on the slopes of Turri- 
alba and near Tucurriqui, on the eastern side of the mountains of Costa Rica, 
BIOL. CENTR.-AMER., Aves, Vol. II., September 1892. 43 
