Bactrocera (Bactrocera) vishnu Drew and Hancock

Drew, R. A. I., Romig, M. C. & Dorji, C., 2007, Records Of Dacine Fruit Flies And New Species Of Dacus (Diptera: Tephritidae) In Bhutan, Raffles Bulletin of Zoology 55 (1), pp. 1-21 : 6

Bactrocera (Bactrocera) vishnu Drew and Hancock

Bactrocera (Bactrocera) vishnu Drew & Hancock, 1994: 65 ; Norrbom et al., 1998: 96. Holotype male in BMNH.

Material examined. – BHUTAN: 1 male, Rimchu 1, 24 May.2000, coll. C. Dorji ; 1 male, Rimchu 1, 14 Jun.2000, coll. Nado ; 1 male, Rimchu 1, 21 Jun.2000, coll. Nado et al.; 1 male, Rimchu 2, 10 May.2000, coll. B.S. Fletcher ; 1 male, Rimchu 2, 16 Aug.2000, coll. C. Dorji ; 1 male, Lingmethang , 700 m, mango tree, 9 Jun.2001, coll. Brian Fletcher. All specimens attracted to cue lure. Specimens in NPPC and QDPI.

Diagnosis. – Face fulvous with a pair of large oval black spots; scutum almost entirely black, postpronotal lobes and notopleura yellow, mesopleural stripe reaching midway between anterior margin of notopleuron and anterior npl. seta dorsally, a pair of moderately broad parallel sided lateral postsutural vittae ending at or just behind ia. seta, medial postsutural vitta absent; setae: sc. 2; prsc. 2; ia. 1; p.sa. 1; a.sa. 1; mpl. 1; npl. 2; scp. 4; scutellum yellow except for narrow black basal band; legs with femora fulvous except for a large oval black spot on outer apical surfaces of fore femora, fore and mid tibiae fulvous tending dark fuscous basally, hind tibiae dark fuscous, tarsi with all segments entirely fulvous; wings with cells bc and c colourless, microtrichia in outer corner of cell c only, narrow fuscous costal band just overlapping R 2+3 and remaining narrow to end just beyond extremity of R 4+5, a narrow fuscous cubital streak confined to cell cup, supernumerary lobe weak; abdominal terga III-V dark orange-brown except for dull black across anterior 1/2 of tergum III and expanding to cover lateral margins and anterolateral corners of terga IV and V dark fuscous to dull black.

Attractant. – Cue lure.

Distribution. – Southern India. New record for Bhutan.

Hosts. – No known record.

Remarks. – This species is a non pest member of the dorsalis complex and is distinct in having a large oval preapical black spot on the fore femora, a narrow medial longitudinal dark band on abdominal terga III-V and fuscous shining spots on tergum V (see Drew & Hancock, 1994).