Key to the subgroups of the Lachesilla andra species group (males only)

1 Claspers well developed and not fused to body of hypandrium but separated from it by a distinct line or attached to it at their base by membrane (see García Aldrete, 1974, Fig. 7). Phallosome a single stem forked posteriorly, each tine bilobed or trilobed at its apex................................................................................................................. Subgroup I

-. Claspers, when present, completely fused to body of hypandrium with no line of separation; claspers often greatly reduced or absent (see Fig. 6 and García Aldrete, 2000, Figs. 3, 10). Phallosome not as above; if a single stem forked posteriorly, then each tine terminating in a spearhead-like structure; otherwise, phallosome either two rods fused only at base, or two separate rods ................................................................................................................................. 2

2 Phallosome a single stem forked in posterior half; each tine terminating in a spearhead-like structure..... Subgroup II

-. Phallosome of two separate rods, or the two rods fused only at base........................................................................... 3

3 Hypandrium extended posteriorly as two lateral lobes (Fig. 6); claspers either absent or represented (?) by a small process on or near the tip of each lateral hypandrial lobe.......................................................................... Subgroup III

-. Hypandrium terminating as two rounded lobes not extending posterior to hypandrial midpoint; claspers represented by a pair of diagonal lines across hypandrium, converging at posterior hypandrial midpoint and a small cone or spike-like projection at their point of convergence.................................................................................... Subgroup IV