xcii INTRODUCTION. 



specimen, killed by M. Montes cle Oca. This beautiful bird also bears a general resemblance in colour and 

 markings to those immediately preceding, but is distmguished from all of them by its delicate light-green metallic 

 crown. For this new species I propose the name of paUidiceps, 



If this little section be found to be composed of four distinct birds, the species will stand thus : — H. longirostris 

 of Trinidad and the adjacent portions of the continent; H, Stuartce of Bogota; //. Sclateri of Costa Rica; and 

 //. paUidiceps of Guatemala and Mexico. 



288. Heliomaster Sclateri, Cahanis. 



Heliomaster Sclateri, Cab. et Hein. Mus. Hein. Theil iii. p. 54, March 30, 1860. 

 Habitat. Costa Rica. 



289. Heliomaster pallidiceps, Gould, 

 Habitat. Mexico and Guatemala. 



Crown of the head shining pale green, much paler than in H. longirostris ; chin black ; gorget purplish red, 

 separated from the ear-coverts by a distinct mark of white ; upper surface bronzy green ; two centre tail-feathers 

 wholly green, the next on each side green tipped with black ; the three outer feathers green at the base, then black, 

 and a spot of pure white at the tip, the white spot becoming less from the outer one, until on the third it is a mere 

 speck; wings purplish brown; chest and centre of the abdomen grey; flanks bronzy green; under tail-coverts 

 pale green, tipped with white. 



Total length 3f inches ; bill If ; wing 2f ; tail 1^ ; tarsi ^. 



"The white sides and the white spot on the back show very conspicuously as this bird rests on its perch.*' — 

 Salvin in Ibis^ vol. ii. p. 264. 



290. Heliomaster Constanti Vol. IV. PL 260. 



Habitat. Guatemala, and Costa Rica. 



291. Heliomaster Leocadi^e. 



Heliomaster pinicola, Gould Vol IV. PI. 261. 



Trochilus Leocadi(S, Bourc. Ann. des Sci. Nat. de Lyon, torn. iv. 1852. 

 Habitat, Mexico. 



Genus Lepidolarynx, Reichenb. 



This form, of which the single species known has received the above generic appellation, differs in many 

 particulars from the preceding ; the bill is less elongated and not so straight, while the tail is decidedly forked ; 

 independently of which, the gular mark is very diflFerent, the entire throat being luminous, while in all the species 

 of Heliomaster the chin is black. 



292. Lepidolarynx mesoleucus. 



Heliomaster mesoleucus Vol. IV. PL 262. 



Lepidolarynx mesoleucus^ Reichenb. Aufz. der Col. p. 13. 



Selasphorus (^Lepidolarynx) mesoleucus, Reichenb. Troch. Enum. p. 11. 



Ornithomyia mesoleuca, Bonap. in Rev. et Mag. de Zool. 1854, p. 251. 



Heliomaster squamosus, Cab. et Hein. Mus. Hein. Theil iii. p. 53. 



Calothorax mesoleucus^ Burra. Th. Bras. ii. p. 339, 1. 



Trochilus mystacinus, Vieill. MSS. 



Habitat. Brazil. 



Genus Calliperidia, Reichenb. 



The Calliperidia Angelas offers a still further departure from the true Heliomasters ; for it has even a shorter bill 

 than the last, while its tail is much more deeply forked. It is by far the finest species yet discovered. Its entire 

 body is clothed in glittering colours, and the bird itself must be seen and examined to obtain an idea of its beauty. 

 The female, on the other hand, has the under surface of the body smoky grey, differing in this respect from all the 

 others. 



293. Calliperidia Angela. 



Heliomaster Angelse Vol. IV. PL 263. 



