1970] 
Brown, Gotwald & Levieux - — Ants 
269 
thick-squamiform, with a free steep, flat anterior face, but attached 
over nearly its entire posterior face to the next gastric segment 
(postpetiole). This petiole is an axially-compressed version of the 
usual amblyoponine pattern. Gaster not unusually long, tapering 
gradually toward apex; genitalia not distinct, and represented in 
Fig. 19 only as a rough approximation. The integument, as far 
as it is developed, seems relatively smooth and featureless overall, 
though, as mentioned above, the punctulation is apparently rather 
dense. 
Pupae, worker, queen and male, enclosed in white cocoons, about 
2.0 to 2.6 mm long in the small form and 3. 1-3.5 mm in the large 
form, with conspicuous black meconial spot at one end. 
Larvae to be described separately by George C. and Jeanette 
Wheeler in a paper accompanying this one. 
The type nest and 3 additional samples all came from the vicinity 
of Lamto Field Station of the University of Abidjan, south-central 
Cote d’Ivoire. Lamto is off the main highway 50 km or so south 
of Toumodi, the nearest town of any size. The holotype and some 
paratypes are deposited in the Musee Nationale d’Histoire Naturelle, 
Paris. Other paratypes are placed in the Museum of Comparative 
Zoology at Harvard University, the British Museum (Natural 
History), the Museum d’Histoire Naturelle of Geneva, Switzerland, 
and elsewhere. 
Bionomics 
So far, Apomyrma stygia has been found only in the vicinity of 
Lamto. This is a region where savanna of the “Guinean” type inter- 
digitates with the gallery forest of the Bandama River and its 
tributaries. A. stygia, which almost certainly is completely subter- 
ranean (except possibly for nuptial flight or promenade), is found 
here only by digging in the soil of the gallery forest and the “un- 
burned” savanna. Unburned savanna has been spared the passage 
of fire for at least 6 years, with the result that thick vegetation 
renders the microclimate at the surface similar to that of the humus 
level in the gallery forest. Up to the present, extensive digging in 
Figures 8-12, Apomyrma stygia sp. n., small form, antenna and mouth- 
parts of queen. Fig. 8, antenna. Fig. 9, labrum, external view. Fig. 10, 
right mandible, dorsal view. Fig. 11, left maxilla, external view; the 
maxillary comb has been drawn as seen through the transparent galea. 
Fig. 12, labium with left labial palpus, lateral view. 
