Nov., 1917 NEW SUBSPECIES OF GEOTHLYPIS BELDINGI 183 



cas region and those from the central portion of the Lower California peninsula. 

 On further comparison the latter prove to represent a remarkable new subspe- 

 cies, which I take pleasure in dedicating to Mr. Edward A. Goldman, who, with 

 Mr. E. W. Nelson, collected the type series. 



Geothlypis beldingi goldmani, subsp. no v. 

 Chars, subsp. — Similar to Geothlypis beldingi beldingi, but male with the 

 upper surface much duller, more brownish or grayish (less yellowish) through- 

 out; crown behind the black mask largely or wholly grayish or whitish instead 

 of j^ellow ; yellow of under parts somewhat lighter and confined to throat and 

 breast ; lower abdomen white or whitish, instead of usually deep yellow, as in 

 Geothlypis beldingi; sides and flanks paler and more grayish. Female similar 

 to the female of Geothlypis beldingi, but upper parts and sides of head paler, 

 more grayish (less yellowish) ; yellow of lower parts paler and less extensive, 

 confined to throat and upper breast, the abdomen being dull whitish, slightly 

 or not at all washed with yellow; sides and flanks paler, more grayish. 



Description. — Type, adult male, no. 196026, U. S. Nat. Mus. ; San Ignacio, 

 Lower California, Mexico; October 7, 1905; E. W. Nelson and E. A. Goldman; 

 original number, 11766. Sinciput, lores, ocular region, cheeks, auriculars, and 

 a narrow line extending diagonally downward and backward to the sides of 

 the throat, black, forming a conspicuous mask; behind this a narrow line of 

 pale grayish mixed with whitish and a little lemon yellow, and on the post- 

 ocular region with lemon chrome ; occiput and cervix brownish olive, verging 

 toward sepia, with a mixture of fine streaks of lemon yellowish, these most 

 conspicuous on the occiput, and resulting from the largely yellow bases of the 

 feathers, wiiich are incompletely covered by the brownish tips ; back and scap- 

 ulars dull citrine, washed with brownish or grayish ; rump similar but lighter 

 and somewhat more grayish ; upper tail-coverts of the same color as the back, 

 but paler and of a clearer shade of citrine ; tail dark citrine, the inner margins 

 of the rectrices more brownish ; wings dark hair brown, the quills and coverts 

 edged w T ith citrine ; sides of neck posterior to the grayish band similar in color 

 to the cervix, but less mixed with lemon yellow; anterior lower parts chrome 

 yellowy paling to lemon chrome on the middle of the upper abdomen , 

 lower abdomen dull yellowish white ; under tail-coverts basally wax yellow, 

 terminally between wax yellow and old gold ; sides and flanks isabella color ; 

 thighs between tilleul buff and drab gray ; edge of the wing lemon chrome ; un- 

 der wing-coverts dull grayish white, washed with lemon chrome. 



Measurements. — Male: 1 Wing, 61.5-65.5 (average, 63.5) mm.; tail. 64-70 

 (66) ; exposed culmen, 12.5-14.3 (13.5) ; tarsus, 23-25 (24) ; middle toe without 

 claw, 15-17 (15.7). 



Female : 2 Wing, 59-63.5 (average, 60.6) mm.; tail, 60-65.5 (62.1); exposed 

 culmen, 13-13.5 (13.2) ; tarsus, 21.5-23 (22.2) ; middle toe without claw, 14-15.2 

 (14.4). 



Geographic distribution. — Central Lower California, from San Ignacio to 

 C onion du. 



Remarks. — This very distinct and unexpected subspecies is most readily 

 distinguished from Geothlypis beldingi beldingi by the whitish crown band, 

 the less yellowish upper parts, and whitish abdomen of the male ; and the less 

 yellowish upper surface, and paler, less extensive yellow of the lower parts in 

 the female. Birds from San Ignacio, which represent, the northern limit of its 



'Seven specimens, from San Ignacio and Comondu, Lower California. 

 2 Three specimens, from San Ignacio and Comondu, Lower California. 



