144 PACIFIC COAST AVIFAUNA No. 11 
438 (633a, part) Vireo belli pusillus Coues 
CaLiroRNIA Least VIREO 
Synonyms—Vireo belli; Vireo pusillus; Vireo pusillus albatus. 
Status—Common summer visitant to suitable parts of the Lower Sonoran 
zone of southern California chiefly west of the desert divides, and north, entirely 
east of the central coast region, through the San Joaquin and Sacramento val- 
leys to Marysville (Belding, Proc. U. S. Nat. Mus., 1, 1879, p. 410). Casual in mi- 
eration to Redwood City, San Mateo County (Littlejohn, Condor, xiv, 1912, p. 
41). Most numerous in the lowlands of the San Diegan district. Recorded also 
from a few points east of the desert divide: Mohave River (J. G. Cooper, Proce. 
Calif. Acad. Sci., u, 1861, p. 122; Mus. Vert. Zool.) ; Death Valley, and Owens 
Valley north to Bishop Creek (A. K. Fisher, N. Amer. Fauna no. 7, 1893, p. 116). 
It is possible that these desert occurrences may really be of birds referable to the 
race arizonae, but material is lacking for determining this point. 
439 (633a, part) Vireo belli arizonae Ridgway 
ArizONA Least VIREO 
Status—Common summer visitant along the valley of the lower Colorado 
River, from below Yuma at least to The Needles (J. Grinnell, Univ. Calif. Publ. 
Zool., x1, 1914, p. 189). 
440 (634) Vireo vicinior Coues 
Gray VIREO 
Synonym—Vireo vicimor californicus. 
Status—Summer visitant to certain portions of the Upper Sonoran chapar- 
ral belt of extreme southern California: Campo (F. Stephens, Bull. Nutt. Orn. 
Club, mt, 1878, p. 42), Cajon Pass (Morcom, Ridgw. Orn. Club, bull. no. 2, 1887, 
p. 51), Riverside (F. Stephens, Auk, vi, 1890, p. 159), Julian (Belding, Land 
Bds. Pae. Dist., 1890, p. 204). Also, as ascertained by the field collectors of the 
Museum of Vertebrate Zoology in the summer of 1908, common and breeding in 
the Adenostoma sparsifolium belt along the west and south sides of the San Ja- 
cinto Mountains and thence east along the Santa Rosa Mountains (J. Grinnell 
and Swarth, Univ. Calif. Publ. Zool., x, 1913, pp. 291-297). Recorded in migra- 
tion from Mecca, Riverside County (Van Rossem, Condor, xi, 1911, p. 137) ; 
also casual (?) northeast to near Bodfish, Kern County, one specimen, June 16, 
1911 (no. 20679, Mus. Vert. Zool.). 
441 (636) Mniotilta varia (Linnaeus) 
BLACK-AND-WHITE WARBLER 
Status—Rare migrant; four instances, each of the capture of a single spe- 
cimen: Farallon Islands, May 28, 1887 (W. E. Bryant, Proc. Calif. Acad. Sci., 
2nd ser., 1, 1888, p. 48); Pasadena, October 8, 1895 (Gaylord, Nidologist, m1, 
1896, p. 106) ; Carmel River, Monterey County, September 8, 1901 (Emerson, 
Condor, m1, 1901, p. 145) ; and Watsonville, September 24, 1903 (Hunter, Con- 
dor, v1, 1904, p. 25). : 
