. Collected papers on ants. Ants. 1907.] Wheeler, Fungus-gromng Ants of North Av^erica. 743 2. Atta (Mcellerius) versicolor Pergande. This ant is unquestionably a ^Mexican species which enters the United States only along its southwestern frontier where it inhabits the arroyo bottoms in the most arid regions. I have observed the tj^ical form of the species only in two localities, at Tucson, Arizona, and at Yucca in the same state, a few miles east of the Californian boundary. At Tucson several colonies were found in an arroyo near the Carnegie Desert Botanical Labora-. Fif<. 17. One of tlie
. Collected papers on ants. Ants. 1907.] Wheeler, Fungus-gromng Ants of North Av^erica. 743 2. Atta (Mcellerius) versicolor Pergande. This ant is unquestionably a ^Mexican species which enters the United States only along its southwestern frontier where it inhabits the arroyo bottoms in the most arid regions. I have observed the tj^ical form of the species only in two localities, at Tucson, Arizona, and at Yucca in the same state, a few miles east of the Californian boundary. At Tucson several colonies were found in an arroyo near the Carnegie Desert Botanical Labora-. Fif<. 17. One of tlie critlers ol tlie gioiiij leiJiesented in the ijrecedinf; ligure, about i natural size, showing the difference between the pellets brought up bj' the ants and the surround- ing soil. (Photograph by the author.) tory where the soil was probably .somewhat moist at a depth of .several feet, but where the surface was very hard and dry and covered with typical desert ]ilants such as the retama (Parkinsonia), the small acacia known as "cat- claw" or "una de gato" {Acacia grce/gi), the Mexican grease-wood {CoviUora Iridentata), the ocotillo {Fourpiicra .splendenfi) and .several cacti (Opiiniia). At Yucca the ants occur in similar arroyos bordered with the beautiful pod- willows {Chilopsis mlir/)ia) in the midst of a very hot, dry desert, studded. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wheeler, William Morton, 1865-1937.
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Keywords: ., bo, bookcentury1900, bookdecade1900, booksubjectants, bookyear1905
