206 Annals of the South African Museum. 



(39). 40. Second node about as long as wide. 



(44). 41. Second node sub-globose ; seen in profile, highest at or near the 



middle. 

 (43). 42. Eyes separated from the base of the mandibles by a distance equal to 



twice the length of the eye. First node feebly convex below 2 mm. 



long ...... Leimbachi, Forel. 



(42). 43. Eyes separated from the base of the mandibles by a distance not 



greater than the length of the eye. First node strongly convex below 



1"4 mm. long . . (Braunsi, Mayr), var. shilohensis, Forel. 



(41). 44. Second node not sub-globose, wider in front than behind ; seen in 



profile, highest in front. 

 (46). 45. First node distinctly higher than long. 1'6-1"9 mm. long. 



Arnoldi, Forel. 

 (45). 46. First node longer than, or as long as high. 

 (48). 47. First node not higher than the 2nd. l - 6-l'8 mm. long. 



(Oscaris, Forel), var. nuptialis, Forel. 

 (47). 48. First node higher than the 2nd. 

 (50). 49. Node of 1st joint of petiole very little longer than the peduncle; seen 



in profile, the dorsum and declivity of epinotum are fairly clearly 



delimited, the declivity sub-vertical . . Schultzei, Forel. 



(49). 50. Node of 1st joint almost twice as long as its peduncle ; seen in profile, 



the dorsum of the epinotum merges very gradually into the declivity, 



which is very oblique (Oscaris, Forel), race springvalense, Forel. 



M. afrtjm, Andre. (Plate V, figs. 58, 58a, 586, 58c.) 

 Ann. Mus. Civ., Genoa, vol. 21, p. 540, £ , 1884. 



9' . 4" 2 mm. Black, mandibles castaneous, flagellum and tarsi 

 brownish red. Pubescence short and very scanty. Anterior margin 

 of clypeus, petiole and margins of abdominal segments with a few 

 long yellowish hairs. Head, thorax and petiole densely and finely 

 reticulate, but appearing granulate when seen under a low magnifica- 

 tion. Abdomen microscopically rugulose or reticulate. The whole 

 body dull. Mandibles shining, striate and coarsely punctured, and 

 armed with 4 sharp teeth. Side of clypeus longitudinally striate. 

 Legs slightly shining. 



Head a little longer than wide, as wide in front as behind, sides 

 moderately convex, posterior angles slightly rounded but prominent, 

 the occipital margin almost straight. Eyes flat, situated a little in 

 front of the middle of the sides. Clypeus raised in the middle, 

 obtusely carinate on each side of the raised area, the carinae ending 

 anteriorly in blunt points, and converging posteriorly between the 

 frontal carinae. Frontal ' carinae short, sub-parallel. Scape long, 

 extending back just beyond the occipital margin ; 1st joint of flagellum 

 as long as the 2nd and 3rd together, 4th joint as long as wide, all the 



