614 Annals of the South African Museum. 



Generally squat species, with the head short, mandibles thick and 

 armed with 5 or 6 teeth. Head not truncate. Partially terrestial 

 and partially arboreal. 



12. Sub-genus MYRMOSPHINCTA, Forel. 



Type C. cinerascens F. Thorax excised between the mesonotum 

 and the epinotum, but not marginate, especially the epinotum. Head 

 simple. 



13. Sub-genus MYRMEPOMIS, Forel. 



Type C. fulvopilosus De Geer. Large species. Pronotum of § major 

 with dentate or angular shoulders. Thorax not excised. Epinotum 

 not dentate. * 



These divisions are not entirely natural and will no doubt undergo 

 revision from time to time, but they are of use in facilitating the 

 study of this very large genus. In the case of some species, it 

 depends on the degree of importance which one is inclined to attach 

 to each of two or more characters whether the species be placed in 

 this sub-genus or that. For instance, C. Dofleini Forel is included 

 in the sub-genus Myrmosphincta by Dr. Forel, on account of .the 

 structure of the epinotum. But the degree of difference, even inclu- 

 ding the epinotum, which this species shows to G. Mayri (sub-gen. 

 Orthonotomyrmex) is slight, or at least of a lower degree of value in 

 classification than the points of resemblance. I have therefore pre- 

 ferred to place it in the sub-genus Orthonotomyrmex. Moreover, C. 

 scalaris Forel, our other representative of the sub-genus Myrmosphincta, 

 is a totally different looking insect, and to place it and Dofleini 

 together is but to enhance the artificial character of these sub-genera. 



Sub-genus CAMPONOTUS, Mayr, s. str. 

 For characters see table of sub-genera. 



We have but one species in this sub-genus, C. belligerum Santschi. 

 It bears a close resemblance to C. maculatus, from which it may be 

 distinguished by the structure of the clypeus and mandibles and the 

 dorsum of epinotum. From the type of the subgenus, C. herculeanus 



* We have only one species, with several races and varieties, all of which 

 may be recognised by the presence of a thick and oblique pilosity on the abdo- 

 men, composed of blunt quill-like hairs or bristles, nearly always hiding the 

 colour and sculpture of the integument. 



