FIGURES 21–31 in Taxonomy and Natural History of the Crematogaster (Decacrema) - group (Hymenoptera: Formicidae) in Madagascar

FIGURES 21–31. Key to Malagasy Decacrema. 21 a: petiole with erect setae; 21 b: postpetiole distinctly bilobed and with erect setae; 22: promesonotum in lateral view flat; 23: promesonotum in lateral view convex; 24: subpetiolar process as acute tooth; 25: subpetiolar process as broad protuberance; 26: subpetiolar process as angular dent; 27: subpetiolar process absent; 28: mesonotum a: not raised in respect to pronotum b: postero-laterally angular, 29: mesonotum rounded postero-laterally; 30: mesonotum a: raised in respect to pronotum b: postero-laterally angular; 31: promesonotal suture a: complete b: incomplete.