5© PACIFIC COAST AVIFAUNA. [No. 4 



about llic middle of March they became more abuiuhmt, thoui;h not a 

 common bird at any time, and soon after the middle of the month were 

 already in pairs. Upon their first arival they were found mostly in the 

 live oaks near the base of the mountains, but the breeding; range seems 

 to lie between 5000 and 7500 feet. Durinc: the breeding; season these 

 vireos were very quiet and incons])icuous. and were most easily over- 

 looked ; hut afler the middle of Aug'ust they be,q^an to api)ear in con- 

 siderable numbers, and were more abundant at this time than at any 

 other. Specimens taken the middle of August are in the midst of the 

 moidt. hut some secured the first week in September ha\'e nearly com- 

 pletetl the change. Birds taken at this time are generally rather darker 

 and more olivaceous than spring- sijecimens, with more greenish-yellow 

 on the edges of the wing and tail feathers. /Vside from these seasonal 

 dilTerences the series of specimens 1 secured here shows very ilttle 

 variation in color, and I took none which approach luiftoiii very closely; 

 but T have a male specimen of hiitfoui taken at Los Angeles on Decem- 

 ber 6th. i8()8. which is almost indistinguishable from autunnial examples 

 of sfcf^lu'iisi \ bi'ing (|uite as pale in coloration, but having rather more 

 greenish-yellow streakings on the sides and flanks than is the case with 

 that race. The bill is also of the larger size which distinguishes the 

 coast race. 



Vireo pusillus Cones. I>east Vireo. 



This species must be of very rare occurrence in these momitains. 

 for the only occasion on wdiich I met with it was on April 8. 1902. when 

 H single bird was seen, but not seciu'ed. in a live-oak at the base of the 

 mountains. /Mong the San Pedro l\i\er it is a connnon migrant, and 

 breeds fairly abundantlv in suitable places. 



Helminthophila luciae (Cooper). Lucy Warbler. 



l'^\>m April 8th to T2th. u;o2, I found this species in very limited 

 numbers, in companx with riri^iiiiac. i^uttiiralis and liitcsccns, in some 

 live-oaks at the mouth of the canyon 1 was camped in. This is the only 

 occasion on which 1 ha\e found it in the lluachucas. though in the lower 

 valleys of this region it is an exceedingly abundant summer resident. 

 .\long the San I'edro River it breeds in great abundance, and (). W. 

 IToward and !•". C. Willard have both informed me that in this region 

 tlu" nest is trctpienth pl.iced in some lu^le or deiiression in the steep 

 sides t>t the "washes"' and "draws" which intersect the couutrv ilraiuing 

 to the river. 



Helminthophila virginiae (I'aird). \ irginia Warbler. 



This sjiecies proved to be very abundant during the spring migra- 

 tion, particularly in the lower parts of the mountains; but the most of 

 them seem to go farther north, and but few, compared with the luunbers 

 seen in April and the early part of May, remained through tlie summer 

 \o breed. The earliest arri\al noted was on .\pril loth and soon after 

 thev were quite abundant, mostlv in the oik region below 3000 feet, 

 remaining so throughout .\pril and up to the first week in May. at which 

 time the migrating birds had about all passed on. .Ml that were seen 

 after that 1 took to be breeding birds, for they graduallv moved to a 

 higher altitude. (6000 to 8coo feel) and were nearly all in pairs. About 

 the middle of .\pril, i()02. 1 found a few rlri^iiiiac. together with other 

 migrating warblers, in the willows along the San Pedro River, some 

 fiileen miles frcnu the mountains. riirouchont the summer thev were 



