334 Annals of the South African Museum. 



9 . Similar to the $ but larger ; forewing with one closed cubital 

 cell, the radial cell open. 



$ . Antennae 10-jointed; 2nd joint of flagelluni very long, 3rd 

 joint short, shorter than the 1st. Mayrian furrows present. Nodes 

 of petiole not so wide as in the $ , the 1st joint subpedunculate. 



This subgenus is distributed throughout the Ethiopian and Indo- 

 malayan regions. One species, T. striatidem, Emery, has become 

 almost cosmopolitan, and is often found in hothouses in temperate 

 countries. The ants of this subgenus are rather timid insects, 

 generally feigning death when touched. The nests are made in the 

 ground. One species, T. Araoldi, Forel, is more frecpuently found in 

 the nests of other ants, apparently in plesiobiotic or cleptobiotic 

 association. 



Key to the £ $ of Triglyphothrix. 



(4) 1. Yellow or reddish-yellow species. 



(3) 2. Thorax dull, very closely and finely punctured; hairs simple. 



Arnold!, Forel. 

 (2) 3. Thorax coarsely reticulate and shining between the reticulations. 



auropunctatus , Forel, var. fusciventris, Forel. 

 (1) 4. Black or brownish species. 



(6) 5. Epinotum with long spines, as long as the interval between their 



bases ...... Constanciae, Arnold. 



(5) 6. Epinotum armed only with small teeth. 



(8) 7. Second node of petiole at least two and a quarter times wider than 



long ....... Marleyi, Forel. 



(7) 8. Second node of petiole not more than twice as wide as long. 

 (10) 9. Thorax irregularly reticulate, brownish ; larger species, 33 mm. 



Inezulae, Forel. 



(9) 10. Thorax strongly and evenly reticulate, piceous ; smaller species, 



26 mm. ...... Ilepburni, Arnold. 



Microps, Mayr, and Trimeni, Emery, are not known to me in nature, 

 and are not included in the above key. Judging by the descriptions 

 Hepburni appears to differ from Trimeni by its larger size and by the 

 1st node of the petiole, which is clearly wider than long ; microps is 

 apparently allied to auropunctatus, but has much smaller eyes. 



T. AUROPTJNCTATTTS, Forel. 



Schultze, Eeise Sud-Afrika, vol. 4, p. 20, $ , $ , 1910. 

 " ^ . 2T-2 - 6 mm. Mandibles strongly striated, punctured, with 3 



