Bactrocera (Zeugodacus) biguttata (Bezzi)

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 : 9

Bactrocera (Zeugodacus) biguttata (Bezzi)

Chaetodacus biguttatus Bezzi, 1916: 111 , holotype in ZSI. Bactrocera (Bactrocera) biguttatus – Hardy, 1977: 49. Bactrocera (Zeugodacus) biguttata – Norrbom et al., 1998: 102.

Material examined. – BHUTAN: 1 male, Tsirang, Darachu , 30 May.2001, coll. Brian Fletcher ; 4 males, Namling 7 km, 9 Jun.2001, coll. Brian Fletcher. All specimens attracted to cue lure. Specimens in NPPC and QDPI .

Diagnosis. – A unique medium to large sized species; face fulvous with a pair of medium sized oval black spots; postpronotal lobes yellow with crescent shaped black markings on inner surfaces; notopleura shining black; scutum entirely shining black; very narrow lateral and medial postsutural vittae present; mesopleural stripe reaching midway between anterior margin of notopleuron and anterior npl. seta dorsally; scutellum shining black with small anterolateral yellow corners; wing with a narrow fuscous costal band absent or almost absent beyond apex of R 2+3 and a dark fuscous spot across apex of R 4+5; cubital streak reduced to pale fuscous within cell cup; cells bc and c colourless; cells bc and c entirely devoid of microtrichia; abdominal terga III-V shining black with at most small red-brown spots on posterior margins of terga III and IV either side of a medial longitudinal black band and narrow red-brown band across posterior margin of tergum V.

Attractant. – Cue lure.

Distribution. – Northern India. New record for Bhutan.

Hosts. – No known record.

Remarks. – Bactrocera (Zeugodacus) biguttata (Bezzi) is similar to Bactrocera (Zeugodacus) assamensis White in possessing dark coloured notopleura, dark markings on the scutellum and femora and abdominal terga III-V mostly black. It differs from B. assamensis in having the scutellum almost entirely shining black, cell br colourless and devoid of microtrichia, a crescent shaped black marking on inner margins of postpronotal lobes and the cubital streak reduced to pale fuscous within cell cup. It is not a pest species.