266 TEOCHILIDiE. 



only been found in Honduras. The genus generally extends from Honduras to South 

 Brazil. 



Compared with the genera which follow, Tlmlurania has a more or less deeply forked 

 tail, the lateral rectrices have no white at the base, and glittering blue enters more or 

 less into the coloration of the plumage of most of the species. 



1. Thalurania townsendi. 



Thalurania townsendi, Ridgw. Pr. U. S. Nat. Mus. x. p. 590'; Salv. Cat. Birds Brit. Mus. xvi. 

 p. 78 ^ 



Supra saturate nitenti-gramineo-Tiriclis, fronte et pileo antico laete micanti-cyaneis, humeris et pliimis inter- 

 scapularibus cyaneo lavatis : subtus micanti-viiidis, subcaudalibus cyaneis albo limbatis ; cauda chalybeo- 

 cyaiieo : rostro nigro. Long, tota 3'8, alae 2-1, caudae rectr. lat. 1'4, rectr. med. I'O, rostri a rictu 0'9. 



2 supra omnino niteuti-viridis ; subtus sordide alba, rectricibus lateralibns albido terminatis. (Descr. maris 

 et feminae exempl. typ. ex Segovia E., Honduras. U. S. Nat. Mus.) 



Hah. HoNDUEAS, Segovia River {C. H. Townsend ^ ^). 



The type specimens of this bird kindly lent us by Mr. Ridgway are the only ones we 

 have seen. They were obtained by Mr. C H. Townsend during an expedition to the 

 Segovia River, which forms the boundary between Honduras and Nicaragua. 



In having the under surface of the body glittering green Thalurania townsendi 

 resembles the Brazilian T. glaucopis, but the violet-blue of the shoulders of the wings 

 and interscapular feathers as well as the colour of the under tail-coverts (dark blue 

 edged with white) suggest that its real relationship lies with its near neighbour 

 T. colombica. 



We shall look anxiously for further news of this interesting species. 



2. Thalurania colombica. 



Ornismya colombica, Bourc. Ann. Sc. Phys. et Nat. Lyon, vi. t. 6 ' ; Rev. Zool. 1843, p. 2 *. 

 Thalurania columbica, Gould, P. Z. S. 1852, p. 8"; Mon. Trocli. ii. t. 106 (Sept. 1858) ' ; Boucard, 



P. Z. S. 1878, p. 69 ' ; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 121 " ; Salv. Cat. 



Birds Brit. Mus. xvi. p. 79 \ 

 Trochilus {Thalurania) venusta, Grould, P. Z. S. 1850, p. 163 ". 

 Thalurania venusta, Gould, P.Z. S. 1852, p. 9°; Mon. Troch. ii. t. 108 (Sept. 1858) '"; Lawr. 



Ann. Lye. N. Y. vii. p. 292"; ix. p. 122"; Scl. & Salv. P. Z. S. 1864, p. 365 "; Salv. 



P. Z. S. 1867, p. 153"; 1870, p. 207 " ; Ibis, 1872, p. 319"=. 



Supra nigra (a fronte adspecta) cupreo-viridis (a tergo adspecta), interscapuliis, humeris, fronte usque ad medium 

 pilei et abdomine micanti-cyaneis, gutture toto mieanti-viridi, subcaudalibus cyaneis albo marginatis ; 

 Cauda cbalybeo-cyanea : rostro nigro. Long, tota 4-0, aJae 2'05, caudas rectr. med. 0'9, rectr. lat. 1'6, 

 rostri a rictu 0-85. 

 2 supra nitenti-viridis, pileo obscuriore et cupreo tincto, uropygio caerulescentiore, capitis lateribus et corpore 

 subtus sordide albis, hj'poehondriis viridi lavatis, rectricibus mediis caerulescenti-viridibus lateraUbus 

 chalybeo-cyaneis albo terminatis. (Descr. maris et feminae ex Panama. Mus. nostr.) 



Eab. NiCAEAGUA, Chontales (BeW^^), La Libertad in Chontales (W, B. Bicluirdson) ; 



