. The Biological bulletin. Biology; Zoology; Marine biology. 200 WILLIAM MORTON WHEELER. habit but live on insect food. The clypeal and mandibular am- mochaetae are smaller than in the palearctic species. There are no hairs on the mentum, but the gular bristles are long, arcuately inserted, rather stiff, directed downward and but little curved. The development of these, as well as that of the cly- peal and mandibular ammochsetae varies directly as the aridity of. Fig. II. Myrmecocystus melliger orbiceps sp. nov. the region inhabited by the ants. Thus M. mexicanus var. horti- deorum McCook (Fig
. The Biological bulletin. Biology; Zoology; Marine biology. 200 WILLIAM MORTON WHEELER. habit but live on insect food. The clypeal and mandibular am- mochaetae are smaller than in the palearctic species. There are no hairs on the mentum, but the gular bristles are long, arcuately inserted, rather stiff, directed downward and but little curved. The development of these, as well as that of the cly- peal and mandibular ammochsetae varies directly as the aridity of. Fig. II. Myrmecocystus melliger orbiceps sp. nov. the region inhabited by the ants. Thus M. mexicanus var. horti- deorum McCook (Fig. 10) which lives on the high plains in com- paratively humid regions, has very poorly developed clypeal and mandibular bristles and the gular ammochaetae are rather short. In M. melliger orbiceps subsp. nov. (Fig. n) which inhabits'the drier regions of central and western Texas, all of the bristles are. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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