26. TACHTTRIORCHIS. 161 



p. 252; Wijatt, Ibis, 1871, p. 382; Pek. Oni. Bras. pp. 7, 394 

 (1871); Scl. i^ Salv. Nomencl. Av. Neotr. p. 119 (1873). 



Young. Dusky black above, the tail with two or three white bars 

 uear base in addition to the median and terminal bands ; crown 

 blackish, the feathers obscurely notched and barred with rufous ; 

 hind neck and underparts pale rufous, thickly barred with dusky 

 black ; least wing-coverts bright rufous, centred and barred with 

 blackish, rest of the wing-coverts dusky black like the back, mottled 

 with pale rufous near tips ; quiUs much as in adult, but having re- 

 mains of black bars across the rufous basal portion. 



The progress to the adult plumage appears to proceed by a gradual 

 change of feather, the bars on the lower surface narrowing and 

 gradually becoming obsolete. The dusky black on the dorsal feathers 

 becomes much broken into zigzag bars ; and the rufous spreads to- 

 wards the shaft of the feather, but is once more confined to the 

 margin when the slaty grey shade of the adult plumage commences 

 to occupy the centre of the feather. 



Adult. Head rufous, the lores whitish, ear-coverts and sides of 

 face light ashy grey ; back and scapulars pale slaty grey, all the 

 feathers margined with rufous ; lower back, rump, and upper tail- 

 coverts blackish, the latter glossed with purple and tipped with 

 white ; least wing-coverts bright rufous, the remainder pale slaty 

 with broad riifous tips, the median ones also margined with rufous ; 

 quiUs rufous, primaries black towards tip, secondaries with a broad 

 subterminal band of purplish brown, the innermost entirely of the 

 latter colour; tail purplish black, mottled and washed with rufous 

 near the base, broadly tipped with white and banded across the 

 middle with a distinct white bar ; under surface of body riifous, the 

 entire breast covered with obsolete remains of narrow blackish bars ; 

 thighs and under wing- and tail-coverts uniform bright rufous. 

 Total length 20 inches, culmen 1-55, wing 16-5, tail S-3, tarsus 4-15. 



Adult female. Larger than male. Total length 24 inches, wing 

 18-3, tail 10, tarsus 4-8. 



Hah. The same as that of the genus. 



a. Juv. St. S. America. Baron Laugier de Chartrouse. 



b, c. Ad. st. S. America. 



d. (S ad. at. Merida. Purchased. 



e. Ad. sk. Mexico. Mr. llartweg. 



/. Ad. sk. Island of Mexiana. A. K. Wallace, Esq. [C.]. 



2G. TACHYTRIORCHIS. 



Tachytriorchis, Knup, Classif. Siiug. u. Vm/. p. 123 Tjpo. 



(1844) ; .' T. albicaudatns. 



llancje. Eastern and Central Brazil from tlie Tropic of Capricorn 

 northwards to Guiana and Columbia, along the western coast of 

 Central America into the south-western boundary of the United 

 States. 



VOL. I. N 



