Helcystogramma albilepidotum, Li & Zhen, 2011
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Helcystogramma albilepidotum sp. nov.
One male, 2 females, same data as for holotype except dated 7–9 August 2004; 1 female, 30 June 1980, 5 females, 14–16, 24 August 1980, coll. Youqiao Liu, other same data as for holotype ( IZCAS) GoogleMaps .
Helcystogramma albilepidotum sp. nov. can be separated from other members of the trijunctum group by the forewing with a white scale tuft at end of cell. It is similar to H. angustum sp. nov. in the female genitalia, but differs from the latter in the broad uncus with median width about half of basal width, the gnathos not dilated distally, and the culcitula semicircular in the male genitalia.
Adult ( Figure 9C View Figure 9 ). Wingspan 15.0–16.0 mm. Head brown to dark brown. Antenna with scape dark brown on dorsal surface, white on ventral surface; flagellum yellowishbrown on dorsal surface, pale ochreous on ventral surface. Labial palpus dorsally with long scales on distal three-quarters of second segment and on middle of third segment; second segment about twice length of diameter of eye, third segment about half length of second; pale greyish-brown to greyish-brown, third segment yellow apically. Thorax and tegula dark brown; without hair pencil arising from mesothoracic anepisternum. Forewing slightly narrowed basally, broadened distally before narrowly pointed apex, termen truncate; ground colour dark yellowish-brown, with scattered dark brown scales; black scale tufts at middle of cell and at middle of fold, the latter larger, white scale tuft at end of cell; narrow dark brown fascia from costal four-fifths length to before tornus, arched outward slightly; fringe dark brown. Hindwing and fringe pale grey. Fore- and midlegs dark brown on outer surface, ochreous on inner surface; hindleg with femur and tibia dark brown on outer surface, greyish-yellow on inner surface, tarsus yellow, and tinged with dark brown on outer surface. Abdomen dark brown, yellow to greyish-yellow apically.
Uncus slightly narrowed from base, with a small triangular process posteriorly, median width about half of basal width; about one-quarter length of valva ( Figure 13A View Figure 13 ). Gnathos slightly narrowed before apex, slightly longer than one-quarter length of valva; culcitula semicircular. Valva narrow at base, bluntly rounded at apex, dorsal and ventral margins almost parallel, slightly longer than tegumen–uncus complex; ventral free lobe slightly arched, with sparse long setae. Vinculum with lobes slightly protruding on inner margin, distal half abruptly narrowed. Saccus broad and short, bluntly rounded anteriorly. Aedeagus with distal two-thirds slightly tapering to rounded apex. Eighth tergite nearly quadrate ( Figure 10L View Figure 10 ).
Anterior apophyses about one-fifth length of posterior apophyses, basal third triangular, distal two-thirds slender ( Figure 15C View Figure 15 ). Antrum nearly semicircular, slightly sclerotized laterally. Ductus bursae slightly widened toward corpus bursae, about 2.5 times length of anterior apophyses, distal third more or less sclerotized on dorsal surface. Corpus bursae irregularly shaped, densely spined on inner surface except anterior quarter, right margin slightly concave at anterior one-fifth length; accessory bursa arising from middle near anterior margin of corpus bursae.
The specific name is derived from the Latin albus, meaning white, and lepidotus, meaning scaled, referring to the white scale tuft at end of cell on forewing.
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