. Ants; their structure, development and behavior. ies,in which I have seen evidence of the founding of colonies by isolatedfemales, would comprise nearly all of our common ants. I have ob-served it in members of all the subfamilies except the Dorylinae. Eventhe Ponerinae, which I at one time supposed to be an exception, con-form to the general rule, for I have found isolated females of Odon-tomachus darns and h&matodes in the act of establishing their formi-caries. During May, 1895, I observed an unusually striking case ofcolony formation by queens of the Californian harvester ( /in/oiioinyr-


. Ants; their structure, development and behavior. ies,in which I have seen evidence of the founding of colonies by isolatedfemales, would comprise nearly all of our common ants. I have ob-served it in members of all the subfamilies except the Dorylinae. Eventhe Ponerinae, which I at one time supposed to be an exception, con-form to the general rule, for I have found isolated females of Odon-tomachus darns and h&matodes in the act of establishing their formi-caries. During May, 1895, I observed an unusually striking case ofcolony formation by queens of the Californian harvester ( / ctilifoniicus) on the edge of the Mojave Desert. This recalls the THE HABITS OF ANTS IN GENERAL. 189 above cited observation of Lincecum on the Texan harvester. I ar-rived at Needles, California, May 23, a day or two after the nuptialflight of P. californicits. This was proved by the thousands of isolatedfemales of this species, in the act of establishing their country in which I observed them was the sandy bottom on the. FIG. 105. Caniponotits pennsylvanicus queen with incipient colony in abandonedcocoon of Rhagiinn Uncutnni under pine bark, slightly enlarged. (Original.; right bank of the Colorado River and the adjacent low escarpment ofthe desert. The latter is interrupted by numerous short draws,which are more or less sandy like the river bottom into which theyopen. The surface of the escarpment, however, is very hard andstony, but it, too, is furrowed by very small draws, often only a fewinches wide and containing sand washed from the surrounding sur-faces by the winter showers. After their nuptial flight myriads ofPogonomyrmex females had rained down over the whole hot, drycountry for a distance of at least three miles to the south and as manyto the west of the Needles. After losing her wings, each female soughtout the regions of pure sand, avoiding the hard surfaces, and set towork digging a hole. The earth was brought out to one side of the 190 j.\


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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectants, bookyear1910