184 . THE CONDOR Vol. XIX 



range, are, as would be expected, most extreme in their characters. Two males 

 and two females from Comondu, some distance south of San Ignacio, are inter- 

 mediate between Geothlypis beldingi goldmani and Geothlypis beldingi beldingi, 

 the females being more like the latter than are the males, which are but slightly 

 different from Geothlypis beldingi goldmani. As a whole the Comondu birds 

 are certainly referable to the northern race. The species has apparently not 

 been found between Comondu and La Paz, Lower California, but Geotlilypis 

 beldingi beldingi probably ranges northward at least two-thirds of the way to 

 Comondu. 



The type of Geotlilypis beldingi is an adult male without date, taken at 

 San Jose del Cabo, in the Cape San Lucas region of Lower California. It is 

 very richly colored above and below, and is similar to most of the series of the 

 southern race examined; hence this name must apply to the Cape San Lucas 

 form. 



There is some individual variation in Geothlypis beldingi goldmani in the 

 extent of the yellow on the lower parts ; also of that on the crown : in two adult 

 males there is no yellow to speak of on the crown behind the black mask ; and 

 these specimens, with their pale grayish or whitish crown bands, look very 

 much like some forms of Geotlilypis trichas, though their large size, more richly 

 yellowish upper parts, and greater amount of concealed yellow on the occiput 

 and on the whitish post-ocular region separate them at sight from all the forms 

 of Geothlypis trichas. 



The present new subspecies seems to be chiefly resident, inhabiting a re- 

 stricted area in Lower California, as the only evidence of its occurrence in the 

 Cape San Lucas region is an apparently immature female (No. 89807, U. S. Nat, 

 Mus.), taken at San Jose del Cabo by Mr. L. Belding on January 21, 1883. 



Detailed measurements, in millimeters, of the adult specimens examined in 

 the present connection are given below. 



i Geothlypis beldingi Ridgway, Proc. U. S. Nat. Mus., v, September 11, 1882, p. 344. 

 measurements in millimeters of specimens OF Geothlypis beldingi goldmani collected 







BY E. W. 



NELSON AND E. A 



. GOLDMAN 







U. S. Nat. 

 Mus. No. 



Sex 



Locality 



Date (1905) 



Wing: 



Tail 



Exposed 

 culmen 



Tarsus 



Middle toe 

 without claw 



196026 1 



$ 



San Ignacio, Low- 

 er California 



Oct. 7 



64.0 



65.5 



14.0 



25.0 



16.0 



196028 



6 



< < < < 



< < 



61.5 



64.0 



12.5 



23.5 



15.5 



196027 



& 



< i c < 



< < 



63.5 



65.0 



13.5 



24.8 



15.3 



196030 



6 



< < < < 



Oct. 8 



65.5 



68.0 



13.3 



23.0 



15.7 



196031 



6 



< < < < 



< < 



63.5 



66.0 



14.3 



23.5 



15.0 



196032 



$ 



Comondu, Lower 

 California. 



Nov. 8 



65.0 



70.0 



13.0 



25.0 



17.0 



196034 



6 



c < < < 



Nov. 9 



62.0 



64.0 



13.5 



23.8 



16.0 



196029 



? 



San Ignacio, Low- 

 er California 



Oct. 7 



59.5 



60.0 



13.2 



23.0 



15.2 



196033 



? 



Comondu, Lower 

 California 



Nov. 8 



63.5 



65.5 



13.0 



21.5 



14.0 



196035 



$ 



< < < < 



Nov. 9 



59.0 



61.0 



13.5 



22.3 



14.0 



iType. 

















Washington, D. C., Sept. 28, 1927. 



