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164 THE CONDOR Vol. XIX long period as on Sept.ember 26 I flushed a parent from its nest containing four young with eyes not yet opened. On that same date there were birds of the year about, which retained only traces of the spotting en the breast indicative 6f the juvenile plumage. The adults, however, were just beginning to acquire new body and tail feathers when I left. Pipilo maculatus montanus. Mountain Towhee. Fairly common above 6500 feet. Young, barely able to fly, were taken September 10. Guiraca caerulea lazula. Western Blue Grosbeak. A conspicuous breeding species along the Limpia up to 6000 feet. Young able to fly only a few feet were found Septem- ber 20. Departs by October 1. Spiza americana. Diekcissel. A lone bird, perching in a low oak near the ranch house on Limpia Ranch, was secured on September 16. Piranga hepatica hepatica. Hepatic Tanager. Not less attractive and far more abundant than either of its two relatives occurring in these same mountains. This spe- cies characterizes the lower edge of the pine zone. Its center of abundance was the site of the old government saw mill at 7000 feet altitude. The number of individuals present at times suggested that they were, perhaps, transients from the Guadaloupe Mountains to the northwestward. On the last visit .I paid to its haunts, September 6, it was still in evidence, but in diminished numbers. I recall seeing no males alive that had mixed plumage, and in the series taken there are none. It is possible that the immature birds had departed from the region before my first meeting with the species. Piranga r-b?a cooperi. Cooper Tanager. Fairly numerous among the cotton- woods at the mouth of Limpia Canyon and occasionally ascending along the course of that stream to 6000 feet. An adult male taken September 20 had completed the molt into the fall plumage. This was the last record for the species. Lanivireo solitarius cassini. Cassin Vireo. The heavy arborescent growth made possible by the spring on the hill slope above Highland Springs Ranch was a haven for several species of vireos. On October 6 a bird, noticeably different from the prevailing form (ptumbeus) was secured. It was identified as cassini by the Biological Survey. Vi?eo huttoni stephensi. Stephens Vireo. In the situation given for the preced- ing I found a few individuals of this small vireo on October 5 and 6. Dend?oica aestiva sonorana. Sonora Yellow Warbler. A tolerably numerous tran- sient along the lower course of the Limpia from September 4 to 16. It favored thickets composed of desert willow and walnut. Dendroica townsendi. Townsend Warbler. By far the most abundant member er the warbler family over the entire mountains during my stay. IcteHa virens Iongicauda. Long-tailed Chat. Due to constant moisture, a vigor- ous composite undergrowth covered the ground under much of the area of the cotton- wood groves. Here Chats and Yellowthroats were at home. I shot an example of the former on September 20 with most of the feathers of the head and throat In sheaths and almost minus a tail. Mimus polyglottos leucopterus. Western Mockingbird. Occasionally ventured by way of the Limpia Canyon up to an altitude of 5700 feet, but not abundant even about Fort Davis. Toxostoma curvirostre curvirost?e. Curved-billed Thrasher. Considerable inter- est is attached to the finding of this thrasher in the Davis Mountains owing to its alti- tudinal range. It was observed daily about the buildings at Limpia Ranch, its favorite retreat being the woodpiles and nearby vegetable gardens. Aside from this, I met with it only where patches of riopal (opuntia) grew. This cactus ascends nearly to 6000 feet and the Curve-bill does likewise. Adults were in ragged condition, with new body feath- ers a,:ppearing in patches, in September and early October. Th?yomanes bewicki eremophilus. Desert Wren. Common throughout the oak re- gions. Its actions and notes were not distinguishable from the other forms of this genus. Sitta ca?olinensis nelsonh Rocky Mountain Nuthatch. Another oak zone frequent- er, likewise abundant. Occasionally enters the pines. Molt completed in September. Baeolophus atHcHstatus atricHstatus. Black-crested Titmouse. Often found with the nuthatches, but descending to a lower altitude. Penthestes gambeli gambeli. Mountain Chickadee. Rather plentiful resident of the pine zone. While not shy it appeared to me as a more active bird than P. catolinen. sis agilis of central Texas; also pessessing more penetrating call notes.