A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 
nobilis Clark picta Smith cephalotes Clark chaset Forel pilosula Smith 
° g 
naa 
FIG. 1. 
Kery To Groups 
1. External borders of mandibles concave .. . 37 
2. Head and thorax with wae more or less obsolete 
EE as 12 
1. Mandibles broad, one- fourth shorter than 
head, furnished with short, broad teeth. 
Scapes extend to posterior sixth of head, 
as long as mandibles .. .. .. .. .. .. .. aberrans Forel 
13. Head and thorax striate-rugose .. .. .. .. .. 21 
2. Mandibles one-sixth shorter than head, 
broadest at basal third, teeth longer and 
sharper. Scapes extend to posterior sixth 
of head, one-fifth shorter than mandibles .. picta Smith 
85 
