1886.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 519 



DESCRIPTION OP A NEW SUBSPECIES OP CYCLORHIS PROM 



YUCATAN. 



By ROBERT RIDCWAlf. 



Cyclorhis flaviventrls yucatanensis, subsp. nov. 



SuBSP. CHAR. — Similar to G. flaviventris Lafr., but lower parts much 

 paler yellow, olive-green of upper parts duller, and ash on top of head 

 without any brownish tinge. 



Adult female (type, No. 37917, 9 ad.,U. S. Nat. Mus., Merida, Yucatan, 

 Feb. 19, 1865; A. Schott) : Crown, occiput, and hind neck dull ash-gray, 

 bordered anteriorly and laterally by a broad superciliary stripe of light 

 rufous, this crossing anterior portion of forehead ; rest of upper parts 

 uniform, rather light, grayish olive-green; sides of head (including 

 malar region and auriculars) light ash-gray ; entire lower parts pale 

 yellow. Wing 3.25, tail 2.70, culmen .75, bill from nostril .42, tarsus .90. 



The specimen selected as the type is decidedly the most deeply colored 

 of three, two others collected by Mr. George F. Gaumer, one at Temax, 

 in June, the other at Merida, in March, being still more unlike Mexican 

 and Guatemalan specimens (four each) of G. flaviventris proper. In the 

 example collected in June, the forehead and superciliary stripes are dull 

 ochraceous, with only a slight rufous tinge ; but in the one taken in 

 March the color is deeper, being, in fact, exactly intermediate in tint 

 between that of the other two specimens. The yellow of the lower 

 parts, however, is exactly the same in all, and very much paler than in 

 the palest of the eight examples of true G. flaviventris with which they 

 have been compared. 



