DESCRIPTIONS 



BLUE-BELLIED SAW-BILLED HUMMING-BIRD , 



Trochilus thalassinus SWAINSOX. 

 PLATES I. and II. 



Trochilus thalassinus, Philosophical Magazine for 1827. 

 L'Anai's, Lesson, Histoire Naturelle des Oiseaux-mouches. 

 Supplement, p. 104. pi. ii Ramphodon anais, Lesson, 

 Trochilidees, p. 146. pis. Iv. Ivi.and Ivii. 



THIS very fine species has been figured in the 

 beautiful work of Mr Lesson, now completed, from 

 which we have borrowed so largely for the illustra- 

 tions of the present volume. That naturalist places 

 it in his genus Ramphodon, with which it agrees in 

 the structure of the bill. In other respects, however, 

 it presents remarkable differences. What we have 

 considered the type of Lesson's genus has the form 

 and colouring of the genus Pcethornus, and the un- 

 der mandible, as in that form, sheaths itself, when 

 closed, within the upper. The tail is also very much 

 graduated. In the present species, we have the form 

 of the wings and tail nearly as in the Mango Hum- 



* The Figures in this volume are of the natural size, 

 except where otherwise mentioned. -f- PI. i. vol. i* 



