Nepalomyia negrobovi, Grootaert, 2013

Grootaert, Patrick, 2013, New Nepalomyia Hollis (Diptera: Dolichopodidae) From Singapore And South Malaysia, Raffles Bulletin of Zoology 61 (1), pp. 103-116 : 113-114

Nepalomyia negrobovi , new species

( Figs. 28–33 )

Material examined. — Holotype male, SINGAPORE: Nee Soon , 5 Apr.2005, swamp forest, Mal 2, (MS name: Si 501; reg. 25047, Si 901, coll. P. Grootaert).

Paratypes: 1 male, Nee Soon , 5 Apr.2005, swamp forest, Mal 2, (reg. 25047, Si 901, coll. PG) ; 3 males, Sime Forest , 13 May 2005, forest, Mal 2, (reg. 25130, Si 941, coll. PG) ; 1 male, Nee Soon , 3 Dec.2005, swamp forest, Mal 2, (reg. 25437, Si 1322, coll. PG) ; 3 males, Sime Forest , 3 Jun.2005, forest, Mal 2, (reg. 25135, on pin, coll. PG) ; 1 male, Sime Forest , 6 May 2005, forest, Mal 2, (reg. 25128, coll. PG) .

Etymology. — The present species is dedicated to Prof. Oleg Negrobov (Voronesh) in honour of his life-long work on dolichopodid taxonomy.

Diagnosis. — Small species with triangular third antennal segment 1.5 times as long as wide. Face grey dusted. All coxae brown. Tip of aedeagus globular, black.

Male: Body length: 1.8 mm; wing length: 1.5 mm.

Head. Vertex brownish black, surpassing level of upper eye margin. Occiput concave. Face brown, grey dusted, parallelsided, as wide as base of third antennal segment. Clypeus very feebly bulging out. Palpus dark brown, with a black apical bristle. Rostrum yellowish brown. Ocellar tubercle prominent. 2 strong black ocellars, 2 postverticals, nearly as long as the postocellars, but less strong; 2 tiny postocellars. Postocular bristles uniseriate, black. Antenna brown, but basal segments darker than third segment. Second segment with a circle of short marginal bristles and with 1 or 2 long dorsal bristles. Third segment elongate triangular ( Fig. 28 ), 1.5 times as long as wide. Arista 3.8 times as long as third segment.

Thorax brown, not shining, pleurae hardly lighter coloured. A shallow prescutellar flattened area. Postscutellum with a median mound. Acr biseriate, long, half as long as dc. 5 dc (growing longer posteriad). 1 long humeral and 1 only slightly shorter posthumeral, 1 short presutural, 2 long postsutural; 1 very long pre-alar; 1 very long post alar, 2 short notopleurals; scutellum with 2 strong marginals with a short hair at side. 1 long black propleural bristle, just above coxa.

Legs yellow, but all coxae brown, including fore coxae. Bristles and hairs black. Fore coxa anteriorly with short hairs ending in 4 long bristles near tip of coxa. Fore femur without bristles, bearing only 2 very short, hair like preapical pv. Fore tibia with short preapical ventral bristle. Mid coxa with numerous anterior bristles and 1 long black bristle below middle. Mid femur with a strong anterior preapical, no posterior preapical. Mid tibia: 2 strong ad, 2 weaker pd; 3 strong bristles in apical crown. Mid tarsomeres with a pair of short apical bristles. Hind coxa with a black exterior bristle, half as long as the one mid coxa. Hind femur with an anterior preapical; no posterior preapical and no other bristles. Hind tibia with a short dorsal bristle just beyond middle and a short anterodorsal preapical. No real apical crown of bristles, only a distinct ventral bristle. Posterodorsal comb short ( Fig. 29 ), with a short, black denticle below. First segment of hind tarsus more than half as long as second segment. All hind tarsomeres with short apical bristles. All claws minute, symmetrical.

Wing faintly brownish tinged with brown veins. Joint of R 2+3 and R 4+5 a little swollen. Apical part of M 3+4 about 2–2.5 times as long as tp. Anal vein distinct at base, gradually fading. Squama brown with fan of long, black cilia. Halter with brownish knob and stalk.

Abdomen brown. Hairs and bristles on terga short. Marginals on first tergite as long as tergite is wide; marginals on following tergites only half as long as tergites are wide. Sterna pale brownish with only sternite 4 having distinct marginals. Genital capsule ( Fig. 30 ) globular, dark brown. Cerci short, with a strong, yellowish bristle near tip. Surstyli elongate, brown in contrast to paler cerci; less than half as long as genital capsule is long. Hypandrium ( Fig. 31 ) yellow, furcate. Aedeagus ( Figs. 31, 32 ) brownish, but tip dorsally darkened. A long pale, epandrial bristle present, inserted on a short tubercle; with a short bristle at base.

Female: unknown.

Remarks. — N. negrobovi , new species is the only species in Singapore with all coxae brownish. It is easily recognised in the male sex by the black globular tip of the aedeagus.

Figures

Figs. 28–33. Nepalomyia negrobovi, new species: 28, antenna with detail of tip; 29, hind basitarsus; 30, genital capsule; 31, tip of aedeagus; 32, appendages on tip of aedeagus; 33, tip of cerci.