Key to the males of Loneuroides

(the male of L. tamaensis n. sp. is not known)

1. Central sclerite of hypandrium with short central process, widely concave posteriorly, with a pair of elongate, slender lateral processes and, ventrally of the latter, a pair of short lateral processes............................ L. rionegroensis n. sp.

- Central sclerite of hypandrium with one median posterior process, flanked by a pair of lateral processes................ 2

2. Epiproct with mesal bulge near anterior border, bearing short spines............................................. 3

- Epiproct with mesal bulge vestigial, represented by a line with row of spines, or mesal bulge adjacent to anterior border.... 5

3. Central sclerite of hypandrium with median process slender, posteriorly straight; lateral processes with an outer bulge, inner border with a slender, sclerotized band........................................................ L. ledesmai n. sp.

- Central sclerite of hypandrium with median process stout, obtusely concave posteriorly; lateral processes blunt ended or pointed.............................................................................................. 4

4. Hypandrium as in Fig. 12; phallosome with anterior pair of endophallic sclerites bow shaped, dilated and pointed at both ends; transverse endophallic sclerite stout, V shaped............................................. L. colombianus n. sp.

- Hypandrium as in Fig. 29; phallosome with anterior pair of endophallic sclerites bow shaped, distal halves more slender than above, club-shaped; transverse endophallic sclerite M shaped, side arms slender, anteriorly concave, with an acute, pointed posterior process.................................................................... L. santanderinus n. sp.

5. Central sclerite of hypandrium with lateral processes stout, blunt ended, bearing distally a slender, sclerotized apophysis. Transverse endophallic sclerite M shaped............................................ L. venezolanus García Aldrete

- Central sclerite of hypandrium with lateral processes slender, distally acuminate, bulged on outer border. Transverse endophallic sclerite broadly V shaped............................................................. L. bretanaensis n. sp.