A Monograph of the Formicidae of South Africa. 551 



wider at the apex, two and a-half times wider than long, hardly twice 

 as wide as long in acanthobia. First segment of petiole wider than 

 long, hearing below a fairly acute triangular tooth pointing down- 

 wards. 



Durban (C. B. Cooper). (G.A. coll.) 



All these races and varieties of G. Liengmei are, in my opinion, 

 closely related, and it is most probable that when we have much more 

 extensive material than is now at our disposal, it will be found that 

 they will all be connected together by minute gradations whereby the 

 limits of the present known forms will be entirely obscured. 



Sub-family CAMPONOTINAE. 



Characters. 



Gizzard with a 4-sepaled calyx separated from the cavity of the crop 

 by circular muscles. (In the Dolichoderinae there is either no calyx 

 or it is enclosed within the cavity of the crop.) 



Petiole 1- jointed, variously shaped. 



The poison gland forms a flat or oval cushion ; the poison vesicle 

 large and elliptical ; no true sting present; only a vestige of it is 

 present, acting as a support for the orifice of the poison vesicle. 



Pupae usually enclosed in cocoons. 



The following subdivisions of the sub-family have been instituted by 

 Dr. Forel (Mem. Soc. Ent. Belg., vol. 20, p. 87 et sea., 1912) : 



Section I. PEOCAMPONOTINAE. 



Calyx of gizzard greatly shortened. The 4 sepals strongly divergent and 

 chitinised from their base upwards. They are very short and strongly 

 recurved at their ends. Mandibles inserted very close together, linear, 

 porrect, longer than the head. No frontal carinae present. Antennae 

 inserted far behind the posterior margin of the clypcus, in an isolated 

 antennal socket . . . Genus Myrmoteras, Forel (not African). 



Section II. MESOCAMPONOTINAE. 



Calyx of gizzard reflected. Including the following S. African genera : Apho- 

 momyrmex, Plagiolepis and Acantholcpis. 



Section III. EUCAMPONOTINAE. 

 Calyx of gizzard straight or slightly curved, but never reflected. Including 

 the following S. African genera : Occophylla, Prenolepis, Camponotus and 

 Polyrachis. 



The Mesocamponotinae contains three tribes, of which two are 

 represented in our region, distinguished as follows : 



