108 Annals of the South African Museum. 



almost vertical, transversely striated, and has the lateral margins 

 raised. The node of the petiole is higher than the epinotum, vertical 

 in front and behind, rounded above, the sides convex. Seen from 

 above, it is a little wider than long, concave, and angulate on each 

 side of the base. The ventral lamella is produced into a large trun- 

 cated projection pointing forwards. First abdominal segment cam- 

 paniform, as long as the 2nd segment, the constriction between them 

 strong. The dorsum of the epinotum at the apex is more or less 

 impressed in the middle, and the apex of the declivity has an obtuse 

 median carina. 



? 6"7 mm., excluding the mandibles. Similar to the £ , 

 but larger and winged. The head is less deeply emarginate 

 posteriorly ; the meso- and metanotum longitudinally striate ; the 

 mesonotum is widest in front, wider than long, and as long as the 

 pronotum. Dorsum of epinotum short, not longer than the pro- 

 notum. The abdominal segments are wider than in the $ . For the 

 rest, as in the $ . 



S. Ehodesia. (S.A.M., E.M., G.A. colls.) 



Genus ODONTOMACHUS, Latreille. 



Hist. Nat. Crust. Insect., vol. 13, p. 257, 1805. 



Characters. 

 $ . Antennal hollows confluent behind the frontal carinae, and 

 separated by two raised, rounded ridges from the deep and oblique 

 post-ocular hollows. The upper tooth of the mandible is generally 

 blunt, the apical and sub-apical usually acute. The internal margin 

 of the mandible more or less strongly denticulate. Node of petiole 

 spined above, the spine pointing backwards. 

 ? . Winged, with larger eyes, and with ocelli. 

 $ . Mandibles very small. Antennae very long, scape very short; 

 Its joint of flagellum wider than long. Node of petiole pointed above 

 but not spined. Abdominal constriction moderately distinct. Pygidium 

 spined. 



0. haematoda, Linn. 

 Syst. Nat. (Ed. 10), vol. 1, p. 582, $ , 1758. 

 De Geer (Formica maxillosa), Mem. Hist. Ins., vol. 3, p. 601, 

 ? , 1773. F. Smith, Cat. Hymen. Brit. Mus., vol. 6, p. 76, 

 <? , 1858. ? 

 £ . 9 - 5 mm., excluding the mandibles. Head and mandibles dark 

 castaneous brown, thorax and petiole more or less castaneous, 



