Helcystogramma flavifuscum, Li & Zhen, 2011

Li, H. H. & Zhen, H., 2011, Review of the genus Helcystogramma Zeller (Lepidoptera: Gelechiidae: Dichomeridinae) from China, Journal of Natural History 45 (17 - 18), pp. 1035-1087 : 1061-1062

The perelegans group

This species group is characterized by the presence of the ocellus ( Figure 4A ), the antenna not ciliate, the labial palpus and the forewing with metallic lustre, the termen slightly concave below apex, the mesothorax without hair pencil from anepisternum; the eighth tergite concave anteriorly, the uncus long, narrowed mesially, deeply and triangularly concave on anterior margin, the gnathos slender and long, acute apically, the valva dilated distally, its ventral free lobe stout, parallel sided, straight at apex, the vinculum with lobes at right angle with margin distally, sharp apically, the saccus short triangular ( Figure 16C ), and the aedeagus shorter than valva, club-shaped distally, roundly dilated apically in the male genitalia. The perelegans group contains H. perelegans ( Omelko et Omelko, 1993) and H. flavifuscum sp. nov. in China, occurring in the middle and southern parts of China (Figure 1).

Remarks

This species group is similar to the hibisci group. It can be separated from the latter by the presence of the ocellus; the longer uncus deeply and triangularly concave on anterior margin, and the aedeagus shorter than valva, roundly dilated apically.

Figures

Figure 4. Head of Helcystogramma spp. (A) Ocellus of H. perelegans (Omelko and Omelko); (B–D) labial palpus: (B) H. brevinodium sp. nov. holotype male; (C) H. rectangulum sp. nov. paratype male; (D) H. angustum sp. nov. paratype male.

Figure 16. Saccus of Helcystogramma spp. (A) H. lutatella (Herrich-Schäffer); (B) H. imagibicuneum sp. nov.; (C) H. perelegans (Omelko et Omelko); (D) H. flavilineolella Ponomarenko; (E) H. angustum sp. nov.; (F) saccal region of Dichomeris okadai (Moriuti).