STEPHENS'S VIREO 249 



western Washington (Ozette Lake) ; and Vancouver Island, British 

 Cokimbia (Victoria and San Josef). 



The range as outlined includes all the North American races of the 

 Hutton's vireo, of which four are recognized. The Vancouver vireo 

 (F. h. insulans) is found on Vancouver Island and possibly the 

 adjacent mainland; the typical race (F. A. huttoni) breeds west of 

 the Cascades in Washington and Oregon and west of the Sierras in 

 California to about latitude 30° in northwestern Baja California; 

 Stephens's vireo (F. h. stephensi) breeds from soutlieastern Arizona 

 to southwestern Texas, south to northern Nayarit and Tamaulipas; 

 Frazar's vireo (F. h. cognatus) breeds in the Cape district of Lower 

 California. Other races are resident in Mexico and Central America. 



Though there seems to be some seasonal movement of individual 

 Hutton's vireos, no definite migratory movement can be distinguished. 



Egg dates. — Arizona: 10 records, May 10 to June 24; 6 records, 

 May 28 to June 9. 



California: 57 records, February 22 to June 20; 2-1 records, April 

 24 to May 26, indicating the height of the season. 



Washington : 12 records, May 2 to June 26 ; 9 records, June 4 to 23. 



Lower California : 1 record. May 10. 



VIREO HUTTONI STEPHENSI Brewster 



STEPHENS'S VIREO 

 HABITS 



This pale southwestern subspecies is found in southern Arizona, 

 New Mexico, central western Texas, and southward to Tamaulipas 

 and the northern part of the Mexican Plateau during the breeding 

 season at least. 



William Brewster (1882) described this race and named it in honor 

 of Frank Stephens, who collected and sent him a series of five speci- 

 mens including the type. The wing of stephensi is decidedly longer 

 than that of typical huttoni and its coloration is much lighter and 

 duller. In comparing the two races, he states that whereas huttoni 

 is "olive-green above and olivaceous-yellowish beneath," with "no 

 clear white anywhere"; stephensi is "grayish-ash above with no de- 

 cided olive-green excepting on the rump and tail. Beneath brownish- 

 white, untinged with yellowish excepting on the sides and crissum. 

 Wing-bands pure white and nearly confluent." 



Mr. Stephens found it "not uncommon in scrub-oaks" (Brewster, 

 1882) in the Chiricahua and Santa Eita Mountains in Arizona, and 

 near Fort Bayard in New Mexico, where it seemed to be confined to 

 the mountain ranges. Mrs. Bailey (1928) reports it in the Animas 

 Mountains, N. Mex., from 5,800 to 8,100 feet. 



843290 — 50 17 



