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KEYS
       Current keys to the Ecitoninae are often clumsy and for numerous reasons difficult to use. Our goal is to produce all new keys which will hopefully do away with at least some of the deficiencies of those previously available. However for the time being, until these keys are completed, the keys here are mostly those that have been utilized in the past based on those by Borgmeier and Watkins. New keys will replace these as they are completed. The keys will for the most part employ terminology which is consistent with usage current to formicid systematics.
KEY TO THE GENERA OF ECITONINAE
Workers
1 Petiole two-segmented (fig. 8) 2
-- Petiole one-segmented (fig. 9) Cheliomyrmex
2 (1) Tarsal claws conspicuously dentate (Fig.10) 3
-- Tarsal claws simple, edentate (fig.11) Neivamyrmex
3 (2) Flagellum slender, apical width of scape less than one-third its length (Plate 19)
4
-- Flagellum robust, apical width of scape more than one-third its length (Plate 53, fig.2)
Nomamyrmex
4 (3) Propodeum with teeth or lamellae (fig 14); soldier subcaste with falcate mandibles (Plate 19, fig.15 -21, 23) (except E. rapax) (Plate 19, fig. 22 )


Eciton

--
        
Propodeum without teeth or lamellae (fig. 24); soldier subcaste without falcate mandibles (fig. 25-)
Labidus

Males
1 Flagellum much longer than MHW 2
-- Flagellum only slightly longer than MHW Cheliomyrmex
2 (1) Legs long, apex of metafemur reaching or surpassing posterior margin of second gastral segment
3
-- Legs short, apex of metafemur not reaching posterior margin of second gastral segment
Neivamyrmex
3 (2) Apex of sagitta with setae (fig. 26) 4
-- Apex of sagitta without setae (fig. 27) Nomamyrmex
4 (3) Gastral terga with lateral clusters of long setae Eciton
-- Gastral terga without lateral setae clusters Labidus
 

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Date of this version 25, December 2001
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by Gordon C. & Roy R. Snelling