42 
Psyche 
[June 
by the heavy granulate sculpture of the head, for in the 
latter species the head, according to previous authors, is 
very smooth and shining. From barbouri (6.9 mm.), it 
may be separated by its much smaller size, by the pos- 
session of two distinct denticles between the last and the 
penultimate mandibular teeth, and by the presence of 
more or less longitudinal rather than transverse rugae on 
the mesonotum. 
In the published keys to the species of Myrmoteras 
(Creighton, 1930; Wheeler, 1933; Gregg, 1954), the Ceylon 
specimens run easily to M. kemneri. Despite their ap- 
parent close relationship to this species, consideration of 
the structural details and size of kemneri (6 mm.), and 
the wide distributional gap between the two, make it quite 
evident they represent different species. Although the 
Fig. 1. Myrmoteras ceylonica sp. nov. A. Right mandible. B. 
Profile of thorax and petiole. 
author has not seen a specimen of kemneri, a study of the 
description and the figures given by Wheeler enable me 
to provide the following comparisons. The antennal scape 
in ceylonica surpasses the occipital corner by a distance 
equal to a little less than one-half its total length, while 
in kemneri the scape surpasses the corner by an amount 
equal to a little more than one-half its total length. Mandi- 
bular teeth in ceylonica number 11, not counting the 
minute ante-apical denticles, whereas there are 10 in 
