BANGS: BIRDS FROM THE CAYMAN ISLANDS. 311 
+ CENTURUS CAYMANENSIS Cory. 
Nine specimens, both sexes, all adult, Grand Cayman, April, May, 
and June. 
This strongly characterized island species, is one of the commoner 
birds of Grand Cayman to which island it is confined. 
TYRANNIDAE. 
TYRANNUS DOMINICENSIS DOMINICENSIS (Gmel.). 
Four specimens, both sexes, all adult, Grand Cayman and Cayman 
Brac, April and June. 
TOLMARCHUS CAYMANENSIS (Nicoll). 
Twenty specimens, both sexes, young and adult, Grand Cayman, 
Little Cayman, and Cayman Brac, April, May, June, and July. 
This is a well-marked form peculiar to the Caymans, where, I be- 
lieve, it does not differ either in color or size in the three islands of the 
group. In fresh spring plumage (April specimens from Grand Cay- 
man) the back is distinctly olivaceous, as compared with the gray 
back in the Cuban form, 7. caudifasciatus (D’Orbigny), in similar 
plumage. In birds killed by May 25 and from then on through the 
summer, the color of the back, by fading and wear, has changed to a 
dirty grayish, quite the same as in Cuban skins in the same condition 
of feather. In this plumage the Cayman bird can only be recognized 
by its much duller, browner head, less contrasted with the gray of the 
back — the head of the Cuban bird in worn plumage being very black 
and sharply contrasted against the color of the back. The Cayman 
bird also has a longer and more slender bill, this character being well 
marked as an average one, but unfortunately failing in the case of 
certain individuals. All the adults from Little Cayman and Cayman 
Brac, except one, are in the worn and faded midsummer plumage 
just referred to; the one exception is M. C. Z. 68248 Cayman Brac, 
June 29, which, though taken on a date earlier than some others that 
had not changed, has almost completed the postnuptial moult and 
has again an olivaceous back. The color of the back in this skin is 
quite the same as in the April specimens from Grand Cayman, while 
the more faded Grand Cayman individuals killed May 25 are like the 
