1954] 
Gregg — Distribution of Myrmoteras 
25 
Holotype: a, single worker in the collection of the Zoolo- 
gisch Museum en Laboratorium, Bogor (formerly Buiten- 
zorg), Indonesia. 
Type locality: Island of Sipora, in the Mentawai Arche- 
pelago off the west coast of Sumatra. The specimen was 
collected by H. H. Karny, ^22g, on October 31, 1924. 
The following key has been modified from Creighton 
(1930) and Wheeler (1933), and includes the diagnostic 
features for the eight known species of the genus. 
Key to the species of Myrmoteras 
1. Frontal furrow well developed, extending back to the 
median ocellus 2 
Frontal furrow absent or represented only by an ob- 
solete impression which does not extend beyond the 
anterior third of the head 6 
2. Head opaque, completely coriaceous, except the occipital 
fold. Length 3.9 mm ivilliamsi 
Head smooth and shining; sculpture if present consist- 
ing of striae on the frons and clypeus 3 
3. Head entirely smooth. Female : length 4 mm bakeri 
Frons, or frons and clypeus striate 4 
4. Mandibles 14-toothed; denticles between apical and pen- 
ultimate teeth not well developed. Female: length 
4.5 mm donisthorpei 
Mandibles 9 or 10-toothed; denticles between apical and 
penultimate teeth well developed 5 
5. Mandibles 9-toothed; frons and clypeus striate. Length 
5.3 mm binghami 
Mandibles 10-toothed; frons striate, clypeus smooth. 
Length 3.6 mm karnyi 
6. Head completely smooth and very shining. Length 5- 
5.6 mm mjoebergi 
Head subopaque, finely and feebly coriaceous 7 
7. Mandibles with a pair of denticles between the apical 
and penultimate teeth ; meso- and epinotum opaque. 
Len^h 6 mm kemneri 
Mandibles without denticles between the apical and 
penultimate teeth ; meso- and epinotum shining. 
Length 6.9 mm barbouri 
