Key to North American Dolichoderus Species

The following key to North American Dolichoderus species is modified from Johnson (1989 ).

1

 * Dorsum of pronotum and mesonotum approximately equal in sculptural development (Fig. 1c) and both surfaces largely opaque; erect hairs on head, upper thoracic surface (Fig. 2c) and scapes. . . . . . Dolichoderus plagiatus


 * Dorsum of pronotum, though granulate or punctate, smoother than the mesonotum, its surface opaque or shining; erect hairs may or may not occur on body and scapes . . . . . 2

2
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 * In dorsal view, the propodeum's width and length approximately equal (Fig. 1b); erect hairs absent from upper surface of alitrunk or confined to anterior of pronotum; body concolored in black. . . . . Dolichoderus taschenbergi


 * In dorsal view, the propodeum's length exceeds its width; erect hairs may or may not occur on upper surface of alitrunk; body concolored or bicolored . . . . . 3

3
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 * No erect hairs on upper surface of alitrunk (Fig. la); the concave declivous face of propodeum sculptured with fine vertical striations; body bicolored. . . . . . Dolichoderus mariae


 * Several erect hairs occur over the length of the alitrunk; the concave, declivous face of propodeum smooth or granulate,; mature adults bicolored or concolored in dark brown or orange. . . . . Dolichoderus pustulatus