Key to Lepidocyrtoides species from Brazil

1 Head dorsally with 6 sutural mac (S0–3, S5–6), M1 mac present; anterior postlabial chaetae smooth (Figs 21B, E); Th II with 10 or more posterior mac; Abd I–III with 1, 4, 2 central mac, respectively (Figs 22A, C–D, 23A)..................................................................................... L. tapuia (Arlé & Guimarães, 1980) comb. nov.

- Head dorsally with 3 or less sutural mac, M1 mac absent; anterior postlabial chaetae ciliate (Figs 5D, 16B, E); Th II with 5 or less posterior mac; Abd I–III with 0, 3, 1 central mac, respectively (Figs 13, 14A, 27, 28A)...........................2

2 Head without Pp5 mac; anterior postlabial region without spine-like mic (Figs 5D, 6A); Th II with 1 posterior mes (p3); Abd I without mac; manubrial plate with 4 blunt mac (Figs 7A, C, 10G)........................ L. caeruleomaculatus sp. nov.

- Head Pp5 mac present; anterior postlabial region with spine-like mic (Figs. 12D–E); Th II with 4 or more posterior mac; Abd I with at least 1+1 (m5) mac; manubrial plate with 2 blunt mac (Figs 13A, C, 15H, 29G).............................3

3 Basomedian labial field devoid of R chaeta; Th II with 5 posterior mac (Figs 26D, 27A)......................................................................................... L. villasboasi (Arlé & Guimarães, 1981) comb. nov.

- Basomedian labial field with R chaeta ciliate; Th II with 4 posterior mac (Figs 16E, 17A)............................4

4 Body of adults completely dark blue and Ant yellowish (Fig. 1B); trochanteral organ with about 98 spine-like chaetae; unguiculus III acuminate; dorsal dens without proximal mac and with two rows of unilaterally ciliate chaetae (Figs 15D–E, H)...................................................................................... L. colormutatus sp. nov.

- Body dark blue between Th III and Abd IV (Fig. 1E); trochanteral organ with about 27 spine-like chaetae; unguiculus III truncate; dorsal dens with 1 modified proximal mac and without rows of unilaterally ciliate chaetae (Figs 19D–E, I)........................................................................................... L. bicolorangelus sp. nov.