552 Annals of the South African Museum. 



A. Antennae 11-jointed in the $, 12-jointed in the <$ . Gizzard longer 



Tribe Plagiolepidini, Forel. 



B. Antennae 9- or 10-jointed in the $ , 10- or H-jointed in the $ . Gizzard 

 shorter ...... Tribe Myrmelachistini, Forel. 



The Eucamponotinae contains five tribes, three of which are 

 represented in our region, and distinguished as follows : 



A. Antennae 12-jointed in the £, 13-jointed in the $. Calyx of gizzard 

 slightly curved or recurved. Antennae inserted at the sides of the frontal 

 area .....'. Tribe Prenolepidini, Forel. 



B. Gizzard long and narrow, the calyx straight. Antennae inserted somewhat 

 behind the frontal area, but near the ends of the frontal carina 



Tribe Oecophyllini, Forel. 



C. Gizzard as in B. Antennae inserted at the sides of the frontal carinae, far 

 from the clypeus and the frontal area . i Tribe Camponotini, Forel. 



Key to the Genera of Camponotinae, $ £ . 



(2) 1. Antennae 9- jointed .... ■ Aphomomyrmex, Emery. 

 (1) 2. Antennae with 11 or 12 joints. 



(6) 3. Antennae 11-jointed. 



(5) 4. Epinotum and petiole more or less bidentate or bispinose 



Acantholepis, Mayr. 

 (4) 5. Epinotum unarmed . . . . . Plagiolepis, Mayr. 



(3) 6. Antennae 12-jointed 



(8) 7. Maxillary palpi 5-jointed. Antennae inserted behind the frontal area 



but near the anterior ends of the frontal carinae Oecophylla, Smith. 



(7) 8. Maxillary palpi 6-jointed. 



(10) 9. Antennae inserted at the sides of the frontal area, close to the posterior 



margin of the clypeus .... Prenolepis, Mayr. 



(9) 10. Antennae inserted at the sides of the frontal carinae, some distance 



from the frontal area and clypeus. 

 (12) 11. ^ 5 polymorphic. Petiole not spinose or dentate. Shoulders of the 

 pronotum very rarely dentate or sharply angular, never spinose in 

 S. African species .... Camponotus, Mayr. 



(11) 12. 5 ? monomorphic. Petiole nearly always spinose or dentate. Shoulders 



of pronotum often spinose, at least dentate . . Polyrachis, Smith. 



Section MESOCAMPONOTINAE, Forel. 

 Tribe MYRMELACHISTINI, Forel. 



Genus APHOMOMYKMEX, Emery. 

 Ann. Soc. Ent. Belg., vol. 43, p. 493, 1899. 



Characters. 

 " ^ . Head short. Antennae 9-jointed (or less ?), the 1st joint of 

 the flagellum longer than the 2nd, the following joints gradually 



