Descriptions of Six New Species of Birds. 457 



tins genus have been foiyid, only one other species ranging 

 north of the Isthmus of Panama, viz. T. venusta from Costa 

 Rica. 



I have named this beautiful species in compliment to Miss 

 Lucy, the young and interesting daughter of my friend Prof. 

 S. F. Baird. 



3. Clilorostilbon insularii^i. 



Crown brilliant orange yellow, upper plumage shining golden green ; 

 under plumage glittering green, on the throat of a bluish shade and on 

 the abdomen and sides golden ; under tail-coverts grass-green ; tail 

 steely blue-black, and slightly emarginate ; wings light brownish-purple ; 

 upper mandible black with the exception of the nasal grooves at the 

 base of the bill which are flesh color, under mandible yellow with the 

 end dark-brown ; tarsi clothed with sooty feathers, feet blackish-brown. 



Length 3 J in. ; wing 1^ ; tail \^ ; bill ^^. 



Habitat. — Tres Marias Islands, Mexico. 



In its dimensions and the color of its plumage this species is 

 almost precisely like C.jprasinus ' it differs, however, in the bill 

 being narrower and in the ridge of the upper mandible being 

 black from the base ; in jprasinus the bill is broader at the base, 

 and the upper mandible is flesh-color for about half its length, 

 the terminal half dark. 



This and the preceding species are in a collection of birds 

 made by J. Xantus, Esq., in July of last year, on the Pacific 

 coast of Mexico and the neighboring islands, and were lately 

 sent to me for examination from the Smithsonian Institution. 



It is quite remarkable that these two species should so 

 closely resemble two others from south-eastern Brazil, a loca- 

 lity so widely different. 



Tiiree other species were obtained by Mr. Xantus at the Tres 

 Marias Islands, viz. Florisuga raellivoi^a (Linn.), Cy anemia 

 Oautemalensis (Gould), and Petasophora thalassina (Sw.). 



