Helina shii 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 : 1572-1575

Helina shii Xue , sp. nov.

( Figure 8A–H )

Type material

Holotype. One male ( Museum of Hebei University), China, Kowloon HongBa, Sichuan Province, 29°13' N, 102°02' E, altitude 2150 m, 25 April 2008, M.F. Shi.

Paratypes. One male (Museum of Hebei University ), same data as holotype .

Etymology

The specific name is based on the name of the collector, Mr Shi Mingfu, with thanks for providing this specimen.

Distribution

China, Sichuan Province, Kowloon HongBa.

Remarks

This new species is similar to H. plumipostitibia Feng and Xue, 2002a , but differs from it as follows: hairs of eyes slightly sparse; fr 5 pairs on lower two-fifths of frons; parafacial slightly broader than antenna width; lateral surface and ventral lateral margin scutellum with black hairs; mid tibia except for p in medial, with 1–2 pv; tergite 2 without coupled small patches, sternite 5 thinner and longer; cercus subsquare in posterior view, lateral margin straight, outer protuberance distinct, broader in profile view; surstylus shorter.

Description (based on holotype)

Male. Body length 9.6–9.8 mm.

Head. Eyes with sparse and median long ciliae; frons equal to or larger than anterior ocellus in width; fronto-orbital plates adjoin in medial part, triangle in lower half; frontal vitta black; fr 5 pairs on lower two-fifths of frons, among the setae with short hairs, without ors; inner and outer vertical setae thin, shorter than ocellar seta; frontoorbital plate and parafacial with copper grey pruinosity, parafacial slightly broader than antenna width; antenna black; length of postpedicel about 3.0 times longer than its width; arista plumose, the longest hairs about 1.0–1.2 times as long as the width of postpedicel; lunule orange; epistoma not protruding; anterior margin of gena with 3– 4 rows of upcurved setae; genal height about two-sevenths of eye height; genal and postgena setulae black; dorsal part of occiput with hairs; prementum with pruinosity, length about 2.5 times as long as height; labella large, length about twice as long as the height of prementum; palpus black, longer than the prementum.

Thorax. Ground-colour black, with orange grey pruinosity; scutum with four black vittae, inner vitta reaching the middle of postsutural area of scutum, the middle pale pruinose vita about 1.5 times as broad as the inner vitta; acr 0+1, prst acr 6–7 rows, dc 2+4, ial 0+2, pra about one-half length of posterior notopleural seta, posterior notopleural seta with many short hairs around base, without outer posthumeral setae; lateral surface and ventral lateral margin of scutellum with black hairs; basisternum of prosternum, proepisternum hollow in centre, anepimeron and katepimeron all bare; lower the posterior spiracle of meron with many short hairs; katepisternal setae 2+2; anterior and posterior spiracles large and dark brown.

Wing. Slightly transparent and orange, basicosta yellow; costal spine absent; ventral surface of costa with hairs, other veins bare; Sc bow-shaped; cross-vein r-m clouded, anterior part of r-m slightly curved outward; R 4+5 and M diverging in distal part; calypters yellowish, lower calypter tongue-shaped protruding, haltere yellow.

Legs. Completely black; fore tibia with 1 median p; mid femur without distinct av, with 4–5 strong pv in basal half; mid tibia without ad, p 4–5, with 1–2 pv in medial part; hind femur with 3–4 av in apical one-quarter, without pv; hind tibia slightly curved in medial part, with 1 lodging av row (about 7–8) and 1 row of lodging pv (about 7–8) in apical two-fifths, most of them about 1.2–1.3 times as long as the diameter of hind femur, without pv in apical part, ad 4, without pd; tarsi longer than tibiae, claws and pulvilli developed, subequal to or longer than tarsomere 5 length.

Abdomen. Oval in dorsal view, ground-colour black, with grey pruinosity; tergites 3–5 each with 1 median and dark orange vitta, both sides with distinct shifting patches; tergites 3 and 4 each with a pair of large and black brown patches; posterior marginal setae of each tergite and discal setae of tergite 5 all strong; sternite 1 with hairs, terminalia smaller.

Female. Frons about one-third of head in width; frontal triangle reaching the anterior margin of frons; frontal vitta about 4.0 times as broad as frons; fr 4, upper orbital setae 2, inner vertical seta slightly strong, longer than ocellar seta, ciliae of eye slightly short; genal height about one-third of eye height; mid tibia with 2 p, slightly short; hind tibia with 2–3 av in apical half, ad 3–4, without distinct pv, other external characteristics same to male.

Figures

Figure 8. Helina shii 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; (E) female, sternites 1–5 in ventral view; (F) female,ovipositor in dorsal view; (G) female, ovipositor in ventral view; (H) female, spermatheca. Scale bars: A, E–G, 1 mm; B, 0.5 mm; C, D, H, 0.2 mm.