160 TRINIDAD AND TOBAGO BULLETIN. [ATX. 2. 3 6- 4. 



They can be most simply distinguished from each other by the 

 characters given in the following table, which was made from 

 identified specimens in the British iMuseum. 

 Lessons Emerald. (No. 54). 



Rump greenish-bronze. 



Tail greenish-bronze. 



Slight traces of white on breast due to base of feathers showing 

 through. 



Breast, when viewed from beneath, grey-brown. 



Both sexes alike. 



Common Emerald. (No. 55). 

 Rump coppery-bronze. 

 Tail purple-blue. 



Breast, when viewed from beneath, brown. 

 Both sexes alike. 



Carib Emerald. (No. 59). 

 Rump green. 

 Tail steel blue-black. 



Breast, when viewed from beneath, blue. 



Female dull green above. Under parts brownish grey fading to 

 white behind, two outer tail feathers tipped with grey. 



54. Agyrtria viridissima, Lesson. Lessons Emerald. 



This species is recorded by Chubb (Birds of British Guiana 

 Vol. I. p. 395), under the name of Agyrtria fimbriata, as occurring in 

 Trinidad, but it is not mentioned by Leotaud, Chapman or fdellmayr, 

 nor have I seen it myself. 



Unless care is taken it will probably be confused with the 

 Common Emerald. 



The back bronze-green, darker on the head and tail. Top of 

 head and lower parts emerald green. Vent white. Tail very dark 

 greenish-bronze. Middle of abdomen has slight traces of greyish- 

 white. Breast feathers, when viewed from beneath, appear grey- 

 brown. Under tail greyish-white. 



The female resembles the male, but has the outer tail feathers 

 tipped with grey. 



The bill is straight and comparatively short. 



55. Saucerottia tobaci erythronotus. Less. Common Emerald. 

 Polytmus erythronota. Leotaud No. 68. 

 This species is probably common, but I can give but little 

 information owing to the difficulty of separating it from the other 

 *' Emeralds," before the above mentioned characters were obtained 

 from an examination of accurately identified specimens at the 

 British Museum. For help in this matter I am indebted to 

 Mr. C. Chubb. 



