New Species of Yucatan Birds. 281' 



XVII. — Bescriplions of two New Species of Birds from Yuca- 

 tan, of the Families Coliimbidce and Formicariidce. 



BY GEORGE ]Sr. LAWRENCE. 

 Read May 29th, 1882. 



1. Leptoptila fulviventris. 



Fore part of the head of a pale bluish wliite ; top of the head, back and 

 wings, olive-brown ; on the rump there is a slight greenish tinge ; the metal- 

 lic color on the sides of the neck is light violet-red, changing to green on 

 the hind neck ; the upper tail-coverts and central tail-feathers are colored 

 like the back ; the outer tail-feather is blackish brown, ending Avith white 

 on the inner web, and with light fulvous on the outer ; the next feather is 

 similarlj" marked, and has the outer web of a lighter brown at the base, for 

 a short distance ; the third feather has the outer web ruddy brown for two- 

 thirds its length from the base, in other respects colored like the first and 

 second feathers ; the fourth feather is brown for its entire length, except at 

 the end, where it is fulvous white ; the primary and secondary quills are 

 vandyke-brown, narrowly edged with pale fulvous white near their ends, 

 tertials the color of the back ; the wing-coverts are of a warmer brown than 

 the back; chin whitish; the sides of the head, the throat and the breast are of 

 a rather dark reddish fawn-color ; the upper part and sides of the abdomen 

 and the flanks are of a clear light fulvous ; the middle of the abdomen and 

 the under tail-coverts are white, tinged with fulvous ; under wing-coverts 

 and axillars deep reddish cinnamon ; the inner margins of the quills edged 

 with very pale cinnamon ; bill black ; tarsus and toes dull fleshy brown, 

 in the dried state. 



Length (skin), 10^- inches ; wing, 5J ; tail, 4J ; bill, \^ ; tarsus, f. 



Type in the miisenm of the State University of Kansas, at 

 Lawrence, Kansas. 



Remarks. — The color of the front is quite simihir to that of 

 L. alliifrons, and it resembles that species somewhat in it color- 

 ing above, but is rather darker; the under plumage is quite diff- 

 erent in coloration, and also much darker: the under wing- 



