TWO NEW SPECIES OF EXOTIC ANTS 1 
By Robert E. Gregg 
Department of Biology, University of Colorado 
The new forms described below were sent to me through 
the generosity of Dr. William L. Brown, Jr., and belong 
to the collections of the Museum of Comparative Zoology. 
I am indebted to Dr. Brown not only for the opportunity 
of describing and figuring these specimens, but for check- 
ing references and for comparing them with related species 
of ants in the Wheeler Collection. 
Stictoponera posteropsis n. sp. 
Female. Length, 5.25 mm., cephalic index, .80. 
Head, excluding the mandibles, considerably longer than 
broad, the widest portion about midway between the mandi- 
bular insertions and the posterior corners ; sides somewhat 
convex anterior to the eyes. Occipital border deeply and 
broadly concave, with sharp, upturned margin, and pro- 
duced at the angles into pronounced occipital lobes which 
project upward. Clypeus rounded, convex, and with an- 
terior margin entire. Frontal carinae remote, parallel, and 
possessing well developed lateral lobes covering the inser- 
tions of the antennae. Eyes very convex, almost hemispheri- 
cal, set far back on the head in depressions just anterior to 
the occipital lobes; ocelli also far posterior on the head. 
Antennae 12-segmented ; scapes long, nearly straight, in- 
creasing slightly in diameter toward the tips, and slightly 
surpassing the occipital lobes. Funiculi not clubbed, but 
segments gradually increasing in size, the terminal seg- 
ment equal in length to the two preceding. Mandibles tri- 
angular; external border sinuate, basal border convex, and 
apical or masticatory border without teeth or denticles. 
Thorax in profile strongly convex, promesonotal suture, 
meso-metanotal and the meta-epinotal sutures distinct, de- 
1 Published with a grant from the Museum of Comparative Zoology 
at Harvard College. 
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