PACIFIC COAST AVIFAUNA. 



[No. 4 



crown patch is much more narrow than in bairdi. The red occipital 

 patch in the female is usually almost square in shape. 



Following is a table of measurements of ten specimens of Melanerpes 

 fonnicivorus aculeatus from Southern Arizona : 



* Collection of F. Stephens. 



Asyndesmus torquatus (Wilson). Lewis Woodpecker. 



Of irregular occurrence in this region, in 1902 I found them fairly 

 common when I arrived in the mountains at the end of March, and they 

 remained so until about the first of May. They did not venture into the 

 canyons at any time, but remained in the groves of live oaks extending 

 along the base of the mountains. The following year they did not put 

 in an appearance at all, in fact this is the only year that I have seen them 

 in the Huachucas. 



Centurus uropygialis Baird. Gila Woodpecker. 



Although the Gila Woodpecker is a common resident all along the 

 valley of the San Pedro River, in the Huachuca Mountains it is of rare 

 and very irregular occurrence. This woodpecker does not seem to mi- 

 grate south from this region to any extent, but after the breeding season 

 it spreads out over a greater area, and wanders to places it does not 

 frequent during the summer. A such times it occasionally strays up into- 

 the Huachucas, but I doubt very much if any breed in the range. I saw 

 one on August 30, 1902, and secured a female on March 9, 1903. One or 

 two others were seen about the latter date but none later than March" 15 r 

 ajl were right at the base of the mountains at an altitude of about 4500. 



Colaptes cafer collaris (Vigors). Red-shafted Flicker. 



A common resident throughout the mountains, but during the 

 breeding season restricted to rather a higher altitude than at other times. 

 They seldom breed below 5500 feet and from there on up become more 

 and more abundant as the summit is approached. They begin to lay the 

 first week in May and the full grown juveniles are tolerable abundant 

 by the third week in July. 



Antrostomus vociferus macromystax (Wagler). Stephens Whip-poor- 

 will. 



A fairly abundant summer resident, occurring principally between 

 5000 and 8000 feet ; they may occasionally occur at a little higher eleva- 

 tion, but I have never seen any below the lowest altitude given. In 1903 

 the first I saw was on April 28, and soon after their notes could be heard 

 every evening, usually from some thickly wooded hillside, near the bot- 

 tom of the canyon. The birds themselves were but seldom seen and I 

 never observed any alight on a road o-r trail, as their near relative the 



