Sensilla placodea
In the mandibular palpus, the SP (♀ = 2.65 ± 0.14 μm, ♂ = 1.27 ± 0.05 μm, t = 9.20, P < 0.01) was significantly wider basally in females than in males. The basal width of the SP of the mandibular palpus was significantly wider in females than in males, but the length of the SP of the labial palpus was significantly longer in males than in females (Table 5). The number of SP in females was much greater than that in males in the mandibular palpus (♀ = 21.20 ± 1.02, ♂ = 12.40 ± 0.24, t = 8.39, P < 0.01) (Figs. 3).