276 Annals of the South African Museum. 



(30) 31. First node above, one and a half times as wide behind as in front; 

 epinotal spines shorter than the interval between their bases. 



setuliferum, race cluna, Forel. 

 (29) 32. Pubescent hairs simple, not scale-like. 



(34) 33. Epinotal spines very long, as long as the dorsum of the epinotum. 



Joffrei, Forel. 

 (33) 34. Epinotal spines shorter, not as long as the dorsum of the epinotum. 



(42) 35. Epinotal spines distinctly longer than they are wide at the base. 



(39) 36. Pronotum finely striated, not reticulate. 



(38) 37. Dorsal face of 1st node distinctly longer than wide ; dark yellowish- 

 red ....... Popovici, Forel. 



(37) 38. Dorsal face of 1st node as wide as, or a little wider than long ; pale 

 ochreous . . capensis, Mayr., and var. Braunsi, Forel. 



(36) 39. Pronotum reticulate or sparsely rugose. 



(41) 40. Pronotum merely rugose, joining the mesonotum in a curve. 



Grassi, Emery. 



(40) 41. Pronotum with very strong and wide reticulations, its junction with 



the mesonotum angular. .... guineense, Fab. 



(35) 42. Epinotal spines not longer than they are wide at the base. 



(52) 43. Larger species, not less than 35 mm. long. 



(47) 44. No trace of a scrobe. 



(46) 45. Epinotal spines (teeth) longer than the episternal ; scapes not nearly 

 reaching the occipital margin . solidum, Emery, var. signata, Forel. 



(45) 46. Epinotal teeth not longer than the episternal ; scapes almost reach- 

 ing back as far as the occipital margin . . Jaurtsi, Forel. 



(44) 47. A more or less distinct demi-scrobe present. 



(51) 48. Dorsal profile of thorax feebly convex or straight; epinotal teeth 

 distinct. 



(50) 49. Larger species, 5 mm. or more ; 1st segment of petiole with the ped- 

 uncle less than half as long as the node . simulator, Arnold. 



(49) 50. Smaller species, 3"5 mm. ; peduncle of 1st segment as long as the node. 



lobulicorne, Santschi. 



(48) 51. Dorsal profile of the thorax strongly angulated at the pro-mesonotal 



junction ; epinotal teeth almost obsolete. 



Emeryi, Mayr, race cristulatum, Forel. 



(43) 52. Smaller species, less than 35 mm. long. 

 (54) 53. Abdomen dull, closely and finely punctured. 



semi-reticulatum, Arnold. 



(53) 54. Abdomen shining, not closely puncttired, or only at the extreme base. 

 (64) 55. Epinotal teeth fairly large, at least distinctly larger and longer than 



the episternal. 



(57) 56. Colour entirely black .... oculatum, Forel. 

 (56) 57. Colour more or less yellow or yellowish-red. 



(59) 58. Second node of petiole as wide as long; a trace of a scrobe present. 



simillimum, Smith, var. shilohensis, Forel. 



(58) 59. Second node wider than long. 



(61) 60. Sculpture fine ; no trace of a scrobe ; 2*2 mm. long. 



pusillum, Emery, var. mossamedensis, Forel. 



(60) 61. Sculpture coarse. 



