Helina subfloscula Xue, 2014

Xue, Wanqi & Sun, Hongkui, 2014, Diagnosis and key for the Helina annosa-group (Diptera: Muscidae) from China, with descriptions of nine new species, Journal of Natural History 49 (25), pp. 1549-1583 : 1576-1578

Helina subfloscula Xue , sp. nov.

( Figure 9A–D )

Type material

Holotype. One male ( IESNU), China, Mount Jiajin , Sichuan Province, 30°20' N, 102° 25' E, altitude 4000–4100 m, 4 August 2008, L. Chang.

Paratypes. Nine males ( IESNU), Mount Jiajin, Sichuan Province, 30°20' N, 102° 25' E, altitude 4000–4100 m, 4 August 2008, L. Chang; One male ( IESNU), China, Mount Balang, Sichuan Province, 30°39' N, 104°04' E, altitude 4300–4600 m, 3 August 2008, J.Y. Liu .

Etymology

The specific name is based on the similarity of the new species to H. floscula Feng and Xue, 2003 .

Distribution

China, Sichuan Province, Mount Jiajin, Mount Balang.

Remarks

This new species is similar to H. floscula Feng and Xue, 2003 , but differs from it as follows. Mid tibia with 1 ad; hind tibia with 1 pd in sub-basal part; sternite 5 longer; cercus sub-square in posterior view, not triangle; outer protuberance distinct, anterior margin of inner protuberance intumescent in profile view.

Description (based on holotype)

Male. Body length 6.5–7.8 mm.

Head. Eyes with long ciliae; frons broad, slightly narrower than the distance between outer margin of posterior ocellus; frontal vitta slightly broader than frons width; 6 pairs of fr on lower three-fifths of frons, without ors; fronto-orbital plate, parafacial and gena with grey pruinosity; parafacia about 1.5 times as broad as postpedicel; antenna black, the length of postpedicel about 2.5 times as long as its width; arista plumose, the longest hairs subequal to the width of postpedicel; epistoma not protruding; vibrissal angle situated behind frontal angle; genal height about one-third of eye height; genal and postgena setulae black; anterior margin of gena with 2 rows of upcurved subvibrissal setula; proboscis short; length of prementum about 2.5 times as long as height; palpus black, longer than prementum.

Thorax. Ground-colour black, with grey pruinosity; scutum with four black vittae, inner vitta reaching scutoscutellar suture, the median pruinose vitta subequal to the width of inner vitta; acr 6–8 rows, only a pair of acr distinct near scutoscutellar suture, acr 0+1, dc 2+4, ial 0+2, pra absent; notopleuron with hairs; colour of scutellum the same as thorax, lateral and lower surfaces of scutellum bare, basisternum of prosternum, katepimeron all bare; lower the posterior spiracle of meron with hairs; katepisternal setae 2+2.

Wing. Slightly with a brown colour, wing-base brown, basicosta orange yellow; costal short, Sc bow-shaped, R 4+5 and M straight, cross-veins r-m and dm-cu distinctly clouded; calypters yellow, haltere dark orange.

Legs. Completely black; fore tibia without median p; mid femur av hair-like, 1 row of pectinate and truncated pv in basal two-fifths; mid tibia with 1 ad, 4–5 p in apical two-thirds, the longest about one-quarter of the diameter of mid tibia; hind femur with distinct av row in apical one-third, without pv; hind tibia with 9–10 pectinate av in apical two-thirds, ad 3–4, 3 of them strong, the longest about one-third length of

hind tibia, 1 row of pectinate p (about 7–8) in apical three-fifths; tarsi longer than tibiae, claws and pulvilli developed.

Abdomen. Ground-colour black, oval in dorsal view; both sides of abdomen with silver grey pruinosity, dorsal surface with orange pruinosity; tergites 2–5 each with a pair of large black patches; tergites 3 and 4 lateral patches minority and slightly confluent; tergite 5 patches minority and indistinct; sternite 1 with hairs.

Female. Unknown.

Figures

Figure 9. Helina subfloscula Xue, sp. nov. (A) Male, abdomen in dorsal view; (B) male, sternite 5 in ventral view; (C) male, cerci in posterior view; (D) male, terminalia in profile. Scale bars: A, 1 mm; B–D, 0.5 mm.