Sensilla trichodea
Sensilla trichodea also occur in a small number in adult mandibular palps but only in one subtype, ST II. The length of female mandibular palpus ST II was significantly greater than that of males; female mandibular palpus segment 2 (♀ = 15.40 ± 0.81, ♂ = 7.80 ± 0.66, t= 7.25, P < 0.01), segment 3 (♀ = 25.40 ± 1.50, ♂ = 7.80 ± 0.37, t = 11.36, P < 0.01) and segment 4 (♀ = 53.80 ± 7.45, ♂ = 17.60 ± 0.68, t = 4.84, P< 0.01) were significantly more numerous in ST II (Fig. 5).