14 HUMMING-BIRDS. 



[Case 23.] 

 HEMISTEPHANIA. « Lance-bill." 



A very singular form, on account of its structure as well as coloration. 

 The bill is very long and straight, the wings very long for the size of 

 the bird and slightly curved, and the tail rounded. Male and female 

 alike in plumage, which is dove-coloured in the species exhibited. 

 Five different kinds are known, inhabiting Yeragua, and extending 

 through Colombia into Ecuador. 



[Case 24.]* 



FLORICOLA and HELIOMASTER. « Stab-throats." 



The members of these two genera have all fine metallic crowns and 

 throats; in Floricola the gorget is not elongated, whereas in Helio- 

 rnaster this is a noticeable feature. Eour species of Floricola are 

 known, ranging from Mexico to Guiana, Venezuela, Colombia, and 

 Ecuador, while the single representative of the genus Heliomaster, 

 H. furcifer, comes from Brazil and Paraguay. 



[Case 25.] 



HELIANGELUS and HELIOTRYPHA. " Sun- Angels." 



In the first of these genera the bill is extremely slender, moderately 

 long, and straight ; wings long ; tail slightly rounded. A band of 

 white or buff crosses the breast. Eive species are known, inhabiting 

 Yenezuela and Colombia, and ranging through Ecuador into Peru. 

 Heliotryplia has much the same form as Heliangelus, but has not the 

 light chest-band. 



[Case 26.] 

 UROSTICTE. " White-tips." 



Bill straight and longer than the head ; nostrils not covered with 

 plumes ; wings pointed ; tail slight, forked. Only two species are 

 known, both of which are remarkable for the brilliant colour of the 

 throat — U. ruficrissa and U. benjamini, from Ecuador. 



("Case 13.] 

 EUSTEPHANUS. " Eibe-ceowns." 



In the Chilian species (E. galeritus) the sexes are nearly alike ; but 

 in the two birds from the Juan-Eernandez Islands they are strikingly 

 different, as will be seen from the specimens here exhibited. Eor 

 many years the female was supposed to be a distinct species. 



* The same case contains Poly tmus. Vide infra, p. 22. 



