Key to US Technomyrmex species

Key to workers of Technomyrmex known from the United States, based on Bolton (2007).

1

 * With head in profile the dorsum behind the level of the posterior margin of the eye with one or two pairs of setae => Technomyrmex difficilis
 * With head in profile the dorsum behind the level of the posterior margin of the eye without setae => Technomyrmex vitiensis