Key to Microledrida species (males) (in part based on Kramer, 1983)

1. Vertex green with three incomplete red stripes (Fig. 15A)...................................... Microledrida virida

– Vertex mainly brown or orange-brown (e.g. Fig. 2C), without distinctive pale green and red colouration................ 2

2. Face unicolourous, entirely darkly mottled, shaded with brownish, or all pale (e.g., Fig. 10C)........................ 3

– Face with middle portion transversely pale, upper and (to a lesser extent) lower portions darker (Figs. 9C, 14C).......... 5

3. Anal tube strongly asymmetrical: right lateral side apically with a distinctive anteroventrally directed appendage, left lateral side apically somewhat downcurved (fig. 11A-B).......................................... Microledrida asperata

– Anal tube symmetrical, right lateral side without distinctive anteroventrally directed appendage....................... 4

4. Anal tube in left lateral view comparatively short, its apical portion broadly blunt (Kramer 1983, fig. 55); phallotheca in lateral view with distally projecting process on ventral margin......................................... Microledrida flava

– Anal tube in left lateral view elongated, its apical portion irregularly oval (Kramer 1983, fig. 68); phallotheca in lateral view without distally projecting process on ventral margin......................................... Microledrida fuscata

5. Phallotheca with two relatively slender apical spines and one thicker spine near the middle on the left lateral or ventral side 6

– Phallotheca with two relatively slender apical spines, lacking a thicker spine near the middle (Caldwell & Martorell 1951, fig. 3a); Puerto Rico, Dominican Republic ...................................................... Microledrida arida

6. Vertex with irregular orange stripes (Fig. 14A), anal tube relatively long, in lateral view apically deflexed (Kramer 1983, fig. 52), strong spine near the middle of phallotheca positioned at its left lateral side (Kramer 1983, fig. 53); USA: Texas; Mexico: Nuevo León ........................................................................... Microledrida olor

– Vertex without orange stripes (Fig. 2C), anal tube short, in lateral view with a straight apex (Fig. 5C), strong spine near the middle of phallotheca positioned at its ventral side (Figs. 6B, 7B); Curaçao .............. Microledrida malpaisa sp. nov.