Phyllomyza sinensis, Xi & Yang, 2015

Xi, Yuqiang & Yang, Ding, 2015, Phyllomyza (Diptera: Milichiidae) newly found in Tibet with descriptions of two new species, Florida Entomologist 98 (2), pp. 495-498 : 498

Phyllomyza sinensis sp. nov. (Figs. 5–8)

DIAGNOSIS

Gena narrowed, approximately one-tenth of eye height. Palpus very long, about 0.7 mm, longer than head height (Fig. 5). Surstylus with upper blade of bifurcated tip extremely swollen and lower one slightly sharp at tip (Figs. 7 and 8).

DESCRIPTION

Male. Body length 1.5–1.7 mm; wing length 1.6–1.8 mm.

Head blackish brown with grayish microtomentum; orbital plates subglossy blackish brown with microtomentum; ocellar triangle darkish brown without microtomentum; lunule strap-shaped, darkish gray with black margin. Posterior eye margin ventrally divergent from head margin; eye 1.4 times as high as long, gena approximately one-tenth of eye height. Setae and setulae on head black; ocellar triangle with 2 long ocellar setae and 3 short setae; frons with 3 orbital and 2 frontal setae on brown orbital stripe without microtomentum, orbital setae lateroclinate and frontal setae medioclinate, 3 interfrontal setae; postocellar setae cruciate. Lunule with 2 setae. Vibrissal angle relatively blunt; vibrissa strong, located at level of lower eye margin. Antenna darkish brown with microtomentum; pedicel with short, black setulae at middle and margin, setulae at margin longer than others, longest one about 2.5 times than others; 1st flagellomere with pubescence, irregularly rectangular; arista 3 times as long as 1st flagellomere, darkish brown, distinctly pubescent. Proboscis very short, folded, blackish brown, margin with sparse black setulae. Palpus very long, slightly curved at basal 1/3, about 0.7 mm, 9 times longer than wide; darkish brown with short, dense black setulae, margin with sparse short setae.

Thorax darkish brown with grey microtomentum, except mesonotum glossy darkish brown with sparse black microtomentum; scutellum darkish brown with gray microtomentum. Setae and setulae on thorax black; 1 h, 2 dc, 1 prsc, 2 npl, 1 prs, 1 pos, 1 sa, 1 ia, 2 pa, 1 kepsts (setulae at forward position); scutellum 1.5 times wider than long, with pair of asc and bsc, asc 2.5 times longer than bsc. Legs slen- der; coxae and femora darkish brown, tibiae darkish brown except fore tibia darkish yellow, tarsi yellowish. Setae and setulae on legs black. Mid tibia with 1 black preapical dorsal seta. Wing hyaline; veins brown; Sc strong; M 1 between r-m and dm-cu longer than dm-cu. Calypter yellowish with dense darkish brown microtrichae, margin with brownish setulae. Knob of halter darkish brown, stalk brown.

Abdomen darkish brown with gray microtomentum. Setae and setulae on abdomen black; T2–T5 with setae at posterior 3/4, marginal setae longer than others; sternites with sparse black setulae. Posteromedial triangular projection of T1 into T2 weak; S2 generally horseshoe-shaped, apical margin blunt; S3 vertically rectangular; S4 trapezoid, apical margin slightly wider than basal margin; S5 irregularly trapezoid, narrowed, apical margin slightly wider than basal margin.

Male genitalia (Figs. 7 and 8). Epandrium with strong setae at middle; surstylus with upper blade of bifurcated tip extremely swollen and lower one slightly sharp at tip; cercus arched with short sparse setae, without ventral appendix.

Female. Unknown.

TYPE MATERIAL

HOLOTYPE Ƌ, CHINA: Tibet, Medog (29°14'33.46 " N, 95°10’29.69 " E), Beibeng , 700 m, 30-VII-2012, W. L. Li ( CAU) . PARATYPES: 1 Ƌ, Tibet, Medog (29°14'33.46 " N, 95°10'29.69 " E), Beibeng , 700 m, 30-VII-2012 ,

X. K. Li ( CAU); 1 Ƌ, Tibet, Medog (29°14'32.06 " N, 95°10'30.36 " E), Beibeng , 1,100 m, 17-IX-2013, G. Yao ( CAU) .

DISTRIBUTION

China (Tibet).

REMARKS

This new species is similar to P. proceripalpis Iwasa from Japan, but it can be separated from the latter by the palpus approximately 2.5 times longer than the greatest horizontal length of the eye and the surstylus with the upper blade of the bifurcated tip extremely swollen and the lower one slightly sharp at tip. In P. proceripalpis , the palpus is approximately 2 times longer than the greatest horizontal length of the eye; the upper blade of the bifurcated tip of the surstylus is promi- nently swollen and the lower one slender ( Iwasa 2003).

ETYMOLOGY

The species name refers to the type locality China .