“This singular and handsome Jay, I first met with near San Miguel, in July, 1852, where I observed a party of some twenty or thirty specimens flitting through the cedars along the roadside. They were mostly young birds, and constantly alighted on the ground, for the purpose, as I ascertained, of capturing lizards, which they killed with great readiness and devoured. “Since that time, I have frequently observed this bird in the winter only, in the neighborhood of Fort Webster, and always in flocks of about forty or fifty; indeed I am not sure that I have not repeatedly fallen in with the same flock, and it may not therefore be as abundant as I am inclined to suppose. Here they evince an exceeding wariness and are very difficult to approach; I have chased a flock for hours without succeeding in getting within gun-shot. “Almost invariably a flock alights near the summit of a hill, and passes down its side rapidly, all the birds keeping quite near to each other, and individuals frequently alighting on the ground, when their attention is attracted by their favorite food. They appear to be very social and keep up a continued twittering note. I have occasionally seen them flying in close flocks, high in the air, and apparently passing from one mountain or hill to another. “This bird, so far as I have seen, is exclusively a mountain species, as I have never observed it in the plains or the bottom lands, which are the usual haunts of its relatives, Steller’s and the California Jay. It differs, however, from them in many respects, and is the only species of these birds that I have never met with singly or in parties of half-a-dozen individuals only. I have always seen it in large flocks. Its food appears to be exclusively reptiles.” C. B. R. Kennerly, M. D., a young naturalist of great promise, who was attached as Zoologist to Lieut. Whipple’s party, for surveying a route for a railroad to the Pacific Ocean, brought fine specimens of the bird now before us, in the large and highly interesting collection of birds made by him in the countries traversed by the expedition. To Dr. Kennerly we are indebted for the following notice of this species: “During the march of our party from the Rio Grande to the Sierra Madre, we saw this bird nearly every day. At that season, which was November, large flocks were constantly found in the vicinity of the running streams, which on being frightened from the low bushes, circled around, loudly uttering their peculiar cry, and rising higher and higher, until they reached the summit of some tree on the rocky hills. When settled, they continued their discordant notes, which somewhat resemble some of those of the common Cat-bird (_Mimus felivox_).”