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80 THE CONDOR VoL. VII ern Arizona, where I have never seen them in anything like the large numbers occurring in California. Junco p. palliatus. Arizona Junco. A few seen, none below 6ooo feet. Some juveniles were secured. Amphispiza b. deserticola. Black-throated Sparrow. Very common every- where along the foothills and out on the mesa. Full grown juveniles were secured. Aimophila r. scotti. Scott Sparrow. Fairly common on the rock-strewn foothills. Pipilo m. megalonyx. Spurred Towhee. Quite common; seen mostly along the canyons. Pipilo f. mesoleucus. Canyon Towbee. Fairly common in the lower parts of the mountains. I found one nest containing young just hatched, but full grown juveniles were also seen. Zamelodia melanocephala. Black-headed Grosbeak. Seen in the higher parts of the range, but not very abundantly. Some birds were also seen in the lower foothills, where they certainly were not breeding. Piranga hepatica. Hepatic Tanager. A few seen in the higher parts of the mountains. Adults and juvenile? were secured. Piranga r. cooperi. Cooper Tanager. Fairly common, most of the birds seen being in the deep, wooded, ravines below the mountains. I found myself continu- ally comparing the avifauna of the Santa Ritas with that of the Huachuca Moun- tains, where I had been collecting earlier in the season, and was surprised at find- ing many species breeding in the one range and not in the other, though the mountains present much the same general appearance, and at the nearest point cannot be much over twenty miles apart. The Cooper tanager, though an exceed- ingly ?are migrant in the Huachucas, was breeding quite commonly in the Santa Ritas, and it was the same with many other species. mostly those generally found in the lowlands. Phainopepla nitens. Phainopepla. One of the commonest birds in the lower parts of the mountains, where both adults and juveniles were seen. This is an- other species that I have not known to breed in the Huachucas. Lanius 1. excubitorides. White-romped Shrike. Not seen in the canyons but frequently met with out on the mesa. On June 2i I found a nest with five eggs in a scraggly little mesquite bush, perfectly unsheltered and unbidden. As I exam- ined the eggs, both birds sat on the bush, almost within arm's reach, with mouths open, suffering froul the heat too much to care what happened. The sun was blaz- i11g down so fiercely that had the nest not been low enough down to see into, I should certainly not have investigated its contents, even had it been a much great- er rarity; and as I did not care for the eggs, [ sat in the shade of the brush for a moment, to see the female slip onto the nest immediately. Vireo g. swainsoni. Western Warbling Vireo. On June 2 3 Mr. Stephens se- cured an adult female of this species. On dissection it did not have any appear- ance of being a breeding bird: and as I have never found the species breeding any where in southern Arizona, I believe that this was nothing more than a straggler, which, for some reason, had failed to go to its breeding grounds. Vireo s. plumbeus. Plumbeous Vireo. Seen on various occasions in the high- er parts of the mountains. Vireo h. stephensi. Stephens Vireo. Seen in the oaks of the lower parts of the range. Although in California huttoni is' found quite commonly in the willow regions of the lowlands, its Arizona prototype, slephensi appears to be a bird of the mountains exclusively, and I have never observed it anywhere in thelower valleys.