Basiflagellum

Antennae of first instar larvae comprised a smooth four-segmented basiflagellum and a seven-segmented, sensilla-rich distiflagellum. Lengthening of the basiflagellum was achieved by the addition of two annuli per moult, generated by division of the basal annulus (meriston).

Morphologically, the antennae (Figs. 2, 3) (the average length, n = 4 for both species) in L. occidentalis are shorter (12.22 mm) in comparison to L. zonatus (15.67 mm). In L. occidentalis (Fig. 3a,c,e,g), the length of the particular segments is approximately: scape (2.61 mm), pedicel (3.86 mm), basiflagellum (2.60 mm), distiflagellum (3.14 mm).