TANAGRA. 



491 



The wing is rounded, the first four primaries being longest and 

 subequal. The tail is square at the tip and rather more than 

 half the length of the wing. The tarsus is about equal in length 

 to the middle toe and claw. Coloration : male and female 

 different. 



Key to the Species. 

 (Males.) 



A. Throat black, or black tinged with violet. 

 a. Fore part of head steel-blue like the 



back and rump T. cayennensis, -p. '^Q2. 



h'. Fore part of head turquoise-blue in con- 

 trast to the back which is steel-blue 



or violet, and the rump yellow T. cyanocephala, p. 493. 



c' . Fore part of head orange-yellow. 



a". Larger, wing more than 60 mm. ; 

 abdomen and under tail-coverts pale 



yellow T.xanthoffaster,-p. 494. 



b". Smaller, wing less than 60 mm. ; ab- 

 domen and under tail-coverts much 

 deeper yellow, inclining to chestnut. T.Jinschi, p. 495. 

 d'. Fore part of head lemon-yellow. 



c". Larger, wing more than oO mm. ; 



under tail-coverts yellow T. cMorotica, p. 496. 



d". Smaller, wing less than 50 mm. ; 



under tail-coverts white T. minuta, p. 497. 



B. Throat orange-yellow ; back steel-blue ... T. violacea, -p. 498. 



C. Throat lead-grey like the back T, plumbea, p. 500. 



(Females.) 



A. Throat, breast, and abdomen yellow. 



a'. Crown of head blue in contrast to the 



back, which is olive-green T. cyanocephala, p. 493. 



h'. Crown of head like the back. 

 a". Larger, wing more than 55 mm. ; 



under surface dull yellow T. violacea, p. 498. 



h". Smaller, wing leas than 55 mm. ; 



under surface bright yellow T. jinscTii, p. 495. 



B. Throat grey, or grey tinged with buff. 



c'. Larger, wing more than 50 mm. ; under 



tail-covorts grey ■. T. cMorotica, p. 496. 



d'. Smaller, wing less than 50 mm. ; under 



tail-coverts white T. «i«««fo, p. 497. 



e'. Middle of breast and middle of abdomen 



grey T. cayennensis, p. 492. 



f. Middle of breast and middle of abdomen 



dark fawn-colour T. xanthog aster, p. 494. 



g'. Middle of breast and middle of abdomen 



citron-yellow T. pliMiibea, p. 500. 



