1.-THE ANTS COLLECTED BY THE AMERICAN MUSEUM COSGO EXPEDITION

Wm Wheeler
unpublished
Dorylinm WORKER ASD SOLDIER.-Clypeus as a rule very short and not limited by sutures. Frontal earinae vertical, not covering the insertions of the antennae. Antennae inserted near the mouth and close t o each other, often less than 12-jointed. Palpi a t most 3-jointed, in Leptanilla only one-jointed. Ocelli and eyes often absent (without exception in all African genera). Suturee of the thorax more or less vestigial; mesono-tum touching the epinotom on the dorsal face, without interposed
more » ... m. Spurs of the tibiae pectinate or rudimentary. Postpetiole not always separated by a constriction from the third segment; however, in Eciton, Bnictus, and Leptanilla, narrowed into the second joint of a two-jointed pedicel. Sting developed. FEhiALE.-Permanently apterous, with the abdomen much enlarged and swollen; very different morphologically from the worker. Clypeus as in the worker. Frontal carinz more or less separated. Antennae 10-t o 12-jointed. No ocelli; eyes not more developed than in the worker; female blind when the worker is so. Segmentation of the thorax more or less rudimentary; no traces of wings or a rudiment left at the tegulae (Dorylus). Postpetiole never separated from the third segment, the pedicel always composed of one segment. Gaster long and voluminous. Mandibles developed , as a rule large; in Leptanilla very short. Antennae 13-jointed; scape long, in Leptanalla only slightly longer than the second joint. Eyes and ocelli well developed. Thorax with normal segmentation, winged. Postpetiole and pedicel much as in the female. Genitalia completely retractile (Dorylini and Ecitini) or exserted and not retractile (Leptanillini) ; subgenital lamina split or furcate; eerci absent. LARVB more or less cylindrical, with short hairs, without hooked setae; mandibles small, slender, falcate.
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