FIGURES 12–19 in Taxonomy and Natural History of the Crematogaster (Decacrema) - group (Hymenoptera: Formicidae) in Madagascar

FIGURES 12–19. Key to the 'subgenera' present in Madagascar. 12: petiole in dorsal view rectangular; 13: petiole in dorsal view ovo–rectangular; 14: dorso–lateral margins of mesonotum carinate; 15: dorso-lateral margins of mesonotum angular; 16 a: petiole slender (in dorsal view) and b: petiolar stalk narrow (in lateral view); 17 a: petiole flared (in dorsal view) and b: petiolar tooth absent (in lateral view); 18: mandibles with a single apical tooth, sickle-shaped; 19: mandibles with 5 teeth, broad (this type of mandibles also often with 4 teeth).