Paraclius adligatus Becker, 1922

Zhang, Lili, Yang, Ding & Grootaert, Patrick, 2007, Paraclius (Diptera: Dolichopodidae: Dolichopodinae) Of Singapore, With New Species From Mangroves, Raffles Bulletin of Zoology 55 (1), pp. 49-62 : 50-51

Paraclius adligatus Becker, 1922

( Figs. 1–4 )

Paraclius adligatus Becker, 1922: 13 (type locality: Taiwan).

Material examined. – SINGAPORE: 2 males, 2 females, Nee Soon , 19 Apr.2005, swamp forest, sweep netting (25070, coll. PG, det. LZ, Si721, ZRC) ; 4 males, Clementi Woods , 15 Mar.2005, park, sweep netting (25014, coll. PG, det. LZ, Si453) ; 1 male, 1 female, Nee Soon , 4 Dec.2002, swamp forest, sweep netting (22054, coll. PG, det. LZ, Si304) .

CHINA: 1 male, Hainan: Baihe , 2 Mar.1959 (coll. Gentao Jin, det. LZ) .

The male type conserved in the Hungarian Natural History Museum is presumed to be lost (L. Papp pers. comm.). The other syntypic material are females.

Diagnosis. – Antenna black, first flagellomere twice as long as wide; arista with basal segment 0.25 times as long as apical segment. All coxae and femora black. Apex of hind tibia and entire hind tarsus black. Mid and hind femora with black ventral bristles (shorter than femur is wide). Female with first flagellomere 1.1 times as long as wide.

Description. – Male: Body length 4.0– 4.1 mm, wing length 3.9–4.0 mm.

Head metallic green with pale grey pollen. Face narrowing downward, distinctly narrower than first flagellomere. Upper postocular bristles black, mid and lower postocular bristles (including posteroventral hairs) pale. Antenna ( Fig. 2 ) black, first flagellomere twice as long as wide; arista black, apicodorsal, with short basal segment and microscopic pubescence. Proboscis brown with black hairs, palpus black with black hairs and black apical bristle.

Thorax metallic green with pale grey pollen. Hairs and bristles black. Six strong dc, 7 pairs of acr; scutellum with 6 bristles (lateral pair longest). Propleuron with 1 black bristle on lower part. Legs largely yellow, with all coxae and femora black. All hairs and bristles black. Fore tarsus from tip of tarsomere 1 onward brown; mid tarsus from tip of tarsomere 1 onward black; apical third of hind tibia and hind tarsus black. Mid and hind coxae each with 1 exterior bristle. Mid and hind femora each with 1 ad preapical bristle. Mid and hind femora with short ventral bristles (less than half width of femur). Fore tibia with 3 ad and 3 pd, apically with 3 short bristles; mid tibia with 4 ad, 3 pad, 1 av and 2 pv, apically with 5 bristles; hind tibia with 4 ad and 4 pd, apically with 3 bristles. Mid tarsomere 1 with 1 v near base. Relative lengths of tibia and 5 tarsomeres LI 1.5: 0.65: 0.3: 0.25: 0.15: 0.15; LII 2.1: 0.9: 0.65: 0.5: 0.3:0.2; LIII 2.55: 0.75: 1.0: 0.8: 0.5: 0.3. Wing ( Fig. 1 ) hyaline, veins brown, R 4+5 and M distinctly convergent; CuAx ratio 1.0. Squama yellow with black hairs. Halter yellow.

Abdomen metallic green with pale grey pollen. Hairs and bristles black. Male genitalia ( Fig. 3–4 ): Epandrium longer than wide, lateral epandrial lobe finger-like with 3 apical bristles; cercus somewhat long oval; hypandrium straight.

Female: Body length 4.0– 4.3 mm, wing length 3.1–3.3 mm. Similar to male, except first flagellomere as long as wide, and the arista with shorter basal segment.

Distribution and bionomics. – China ( Taiwan, Hainan), Pakistan, Singapore. P. adligatus is found in swampy areas and in the rainwater drains in parks in Singapore. It seems to be a freshwater species.

Figures

Figs. 1–4. Paraclius adligatus Becker: 1, wing; 2, antenna; 3, cercus; 4, male genitalia. Legend: el – epandrial lobe; hy – hypandrium; sur – surstylus.