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Published online by Cambridge University Press: 31 May 2012
Yellowish, slender faintly villous; face yellow; between the antennæ and a little above, a longitudinal median line, connected with a transversal one on the epistom, all black; palpi equal, pale, the apical joint of maxillary and this of labial, which is very little thickened in the basal half, somewhat brownish; antennæ longer than head and prothorax, in the male fuscous annulated with luteous, especially before the tip, which is clavate; shorter, more clavate in female; the two basal joints brown, shining; vertex elevated, rounded, yellowish with two blackish dots; prothorax little longer than broad, yellowish, with two dorsal black lines, ending on the anterior transversal sulcus; sometimes a darker spot in front of the lines; on each side and nearly below a black band connected with the lateral one of the thorax; two black maculose bands including yellow spots on the thorax; two black maculose bands including yellow spots on the thorax; mesothorax before wings black, with yellow spots; abdomen of male much longer than wings, faintly villous yellow, with a fine black median line, apical part blackish, yellow on articulation and some lateral marks; appendages less than half the length of last segment, cylindrical, yellowish, brown at abse, densely clothed with black hairs; below and between them a small triangular yellow plate;