Syneches latus, Yang & Grootaert, 2004

Yang, Ding & Grootaert, Patrick, 2004, Revision Of The Species Of Syneches From Guangdong (Diptera: Empidoidea: Hybotinae), Raffles Bulletin of Zoology 52 (2), pp. 347-350 : 348-349

Syneches latus , new species

( Figs. 3, 4 )

Material examined. – Holotype - male, Guangdong: Yingde, Shimentai National Forest Park, 28 Mar.2003, coll. Ding Yang ( CAU).

Diagnosis. – Antenna brownish-yellow with brownish first flagellomere. Palpus brownish-yellow. Wing grayish. Hairs on abdomen mostly long and pale.

Description. – Male – Body length 5.6 mm, wing length 5.4 mm.

Head black with gray pollen. Eyes contiguous on frons for a long distance, dark brown with enlarged upper facets dark yellow. Hairs and bristles on head black; ocellar tubercle distinct, with 2 oc and 10 hairs, oc little longer than hairs. Antenna brownish yellow, first flagellomere brownish; scape without hairs; pedicel with circlet of subapical hairs; first flagellomere nearly quadrate with 1 dorsal hair; arista brownish, indistinctly pubescent except tip thin and bare. Proboscis brownish yellow; palpus brownish-yellow with 2 long ventral hairs.

Thorax black with gray pollen. Hairs and bristles on thorax

black; h absent, 2 strong npl subequal in length, mesonotum with short hairs except mid-posterior area with long hairs and with one transverse row of 3 prescutellar bristles, 1 long psa; scutellum with long marginal hairs (of which 6 hairs are bristle-like). Legs yellow; coxae and trochanters black; fore and mid femora with basal 1/3 brown, hind femur with extreme base brown; tarsomere 5 black. Hairs and bristles on legs black. Fore femur 1.1 times as wide as mid femur; hind femur 1.1 times as wide as mid femur, with one row of 7-8 long thin av distinctly longer than thickness of hind femur (of which only 4 av are stronger). Fore tibia apically with 4 bristles. Mid tibia with 1 ad at base and one row of 6-7 posterior bristles, apically with 4 long bristles. Hind tibia with 1 long ad and some long posterior hairs, apically with 4-5 bristles including 1-2 long brownish yellow pd. Wing grayish; stigma long and dark brown; veins dark brown, R 4+5 and M 1 convergent apically. Squama brownish with pale hairs. Halter brown.

Abdomen curved downward, black with gray pollen. Hairs on abdomen mostly long and pale. Male genitalia ( Figs. 3, 4 ): tergal lobe nearly uniformly wide in lateral view, with outer apical margin obliquely subtruncate, and with short acute upper apical corner; hypandrium with slightly wide apical portion, and its apical margin weakly incised medially with 2 weak spines on each side; aedeagus rounded apically, with curved subapical lateral process.

Female. – Unknown.

Distribution. – China (Guangdong).

Etymology. – The species is named by the hypandrium wide apically.

Remarks. – The new species is similar to Syneches acutatus Saigusa & Yang, 2002 , from Henan, but can be separated from the latter by the antenna brownish-yellow with the first flagellomere brownish, hairs on the abdomen mostly long and pale, and the hypandrium wide apically with a weak midapical incision. In S. acutatus , the antenna is wholly yellow, the hairs on the abdomen are black, and the hypandrium is narrow apically with a distinct mid-apical incision ( Saigusa & Yang, 2002).

Figures

Figs. 3, 4. Syneches latus, new species (male). 3. genitalia, lateral view; 4. hypandrium and aedeagus, ventral view.