J Monograph of the Formiciclae of South Africa. 167 



BB. Anterior wings with one closed cubital cell. 



C. Head not cordiform in the $ and ? . 



D. Frontal carinae close together ; thorax unarmed, without sutures or 

 dorsal impressions in the £ Melissotarsini, Emery. 



DD. Frontal carinae more or less distant. 



E. Antennae 7-jointed, without a distinct club in the § and ? ; 13-jointed 

 in the $ . Epinotum armed, abdomen cordiform in the $ . 



JHyrmicarini, Forel. 

 EE. Antennae with more than 7 joints in the § an d ? . 



F. Antennal fossa delimited oh the inner side only by the frontal carinae ; 

 antennae generally 12- or 13-jointed in the <? . 



G. Anterior wings with the radial cell largely incomplete ; the cubital 

 joins the radial, but does not go beyond it ; the brachial unites with 

 the medial ; $ generally apterous . . Cardioconclylini, Emery. 



GG. Anterior wings with the radial cell variable ; the cubital unites with 

 the radial by a veinlet ; the cubital more or less long (Solenopsis type) ; 

 in some genera and groups (a large number of Cremastogaster and 

 Monomorium and some smaller genera allied to them) the cubital vein 

 shortens so much as to disappear (Formica type). 

 H. The 2nd joint of the petiole articulates with the upper surface of the 

 abdomen ...... Cremastogastrini, Forel. 



HH, The 2nd joint of the petiole articulates with the basal apex of the 

 abdomen. 



a. Characters negative, genera which cannot be placed within any of the 

 others ; radial cell generally closed. Mayrian furrows generally distinct 

 in the $ . - . . . . Myrmecinini, Ashmead. 



b. Thorax of the £ usually short ; promesonotum large ; epinotum with 

 the dorsixm very short or obsolete, the spines situated very low ; in 

 Meranoplus the mesonotum projects beyond the epinotum. Antennae 

 9 to 12-jointed in the § and $ , and usually more or less retractile into 

 a scrobe. Mayrian furrows well defined in the S, which has the 

 antennae 13-jointed ..... Meranoplini, Emery. 



c. Antennae 11 to 12-jointed in the £ and $ , more rarely 7 to 10, usually 

 with a 2 or 3-jointed club ; antennae in the $ 12 or 13-jointed, rarely 11 ; 

 anterior wings with the radial cell always open. Mayrian furrows 

 indistinct in the $ (except Monomorium) . . Solenopsidini, Forel. 



d. Antennae in the $ and ? 9 to 11-jointed, with a club usually of 2 

 joints ; wings with radial cell always closed and with a large discoidal. 

 Mayrian furrows absent .... Pheidologetini, Emery. 



GGG. Cubital vein of the anterior wing united with the radial, or is connected 

 with it by a very short veinlet (Formica type). 



e. Antennae in the £ and $ 12-jointed, without a club; 1st joint of the 

 petiole elongate, abdomen small and pyriform, thorax unarmed, without 

 sutures or clear impressions on the dorsum. Antennae 13-jointed in the 

 S , the scape very short ; anterior wings with the radial cell closed. 



Ocymyrmicini, Emery. 



f. Antennae in the $ and $ 11 or 12-jointed, club of 2 or 3 joints ; antennae 

 in the c? of more than 10 joints ; epinotum generally armed. 



Leptothoracini, Emery. 



