DELATTEIA. 337 



4. Delattria sybillsB. (Tab. LIV. a. figg. 8, c? ; 4, ? .) 



Delattria sybillce, Salv. & Godm. Ibis, 1892, p. 327 '; Salv. Cat. Birds Brit. ISIus. xvi. p. 664 '. 



D. viridipallenti proxime affinis, sed pectore et hypochondriis viridibus gula eoncoloribus, dorso imo vix cnpreo 

 tineto, rectricibus lateralibus griseis facile distingaenda : rostro nigro. Long, tota circa 4-5, alee 2-6, 

 caiidse rectr. med. 1-3, rectr. lat. 1-7, rostri a rictu 0"95. (Descr. maris exempl. typ. ex Matagalpa, 

 Nicaragua. Mus. nostr.) 



$ supra man similis, subtus alba, gula leviter cervino tincta, cervicis lateribus et hypochondriis viridi punc- 

 tatis, rectricibus lateralibus griseo-albis fascia angusta indistincta subapicali fosca notatis. (Descr. 

 feminse ex San Rafael del Nort*, Nicaragua. Mus. nostr.) 



Eab. Nicaragua, Matagalpa ^ ^, 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 B. viridipallens, this species has several points of distinc- 

 tion. In the former bird the throat alone has green discal spots, whUst in D. sybillce 

 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. (Tab. LiV. figg. 3, c? ; 4, ? .) 



Oreopyra hemileuca, Salv. P. Z. S. 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'. 

 Caeliffena hemileuca, EUiot, Syn. Troch. p. 31 ^ Sharpe, in Gould's Men. Troch., Suppl.t. 5 (April 



1885) • ; 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 laetioribus, rectricibus mediis cupreo tinctJs ; stria postoeulari 

 elongata alba : subtus alba, gula media late 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, alae 2-4, 

 caudse 1-5, rostri a rictu 0-9. 

 $ supra mari similis, capite summo dorso fere concolore : subtus gulee plumis mediaUter viridibus, plaga 

 violacea nulla,' caudse rectricum apicibus latiore palHdis. (Descr. maris et feminae exempl. typ. ex Turri- 

 alba, Costa Eica. Mus. nostr.) 



Eal. Costa Rica {JEndres, Zeledon, Alfaro in U. S. Nat. Mus.), Turrialba, Tucurriqui 

 (ArcS^), Candelaria and Rancho Redondo {v. i^«»^z^^«s s), Naranjo de Cartage 

 (Boucard ^, Zeledon ^). 

 Little is known of this weU-marked species, the first specimens of which were sent 

 us by our collector Enrique Arce, 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. CENTB.-AMEB., Aves, Vol. 11., September 1892. ^^ 



