“ This beautiful species may readily be distinguished from the well-known I. viridis by the much greater 
development of white in the tail-feathers. The first outer pair are all pure white, except a narrow basal 
patch concealed by the tail-coverts. Of the second pair considerably more than the apical half is white ; in 
the third pair the white apices measure 2 inches in length. When the tail is closed the under surface 
appears perfectly white. Comparing the amount of white in the tail with that shown in I. viridis the 
distinctness of the two birds is apparent. 
“ Notwithstanding this difference, the species remained for several years undescribed both in Mr. 
Lawrence’s cabinet and our own; but in 1870 Mr. Sclater and I had occasion to reexamine the question, 
when it became manifest that this fine species required a name. About the same time Mr. Lawrence also 
bestowed the name eocimius upon it. 
“The first specimens of this species were forwarded to Mr. Lawrence from the Panama-Railway line, by 
the late Mr. James M'Leannan, who afterwards supplied Mr. Godman’s and my collection with skins of both 
sexes. The bird does not seem to extend its range into Central America beyond the railway (though it is 
there not uncommon), as our collector Arce did not meet with it in the district of Veragua, which he has 
so carefully investigated. Further to the southward we know very little of its range, as it does not come 
within the grasp of the bird-collectors of Bogota. Mr. Wyatt, however, when travelling in the valley of the 
river Magdalena, shot a female Trogon which Mr. Sclater and I determined to be of this species. He met 
with it in the forest near Paturia, and says that he heard the male calling further in, and he noted that the 
iris was dark brown (Ibis, 1871, p. 374). From this it would appear that the home of Trogon chiomrus is 
the low-lying hot forests of the great valley of the Magdalena, and that it extends its range into the Central- 
American isthmus as far as the foot of the mountains which form the higher ranges of Veragua and 
Costa Rica.” 
The Plate represents a male and a female, of the natural size. 
