Bactrocera (Zeugodacus) assamensis White, 1999

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 : 8

Bactrocera (Zeugodacus) assamensis White

Bactrocera (Zeugodacus) assamensis White , in White & Evenhuis, 1999: 522. Holotype female in BMNH.

Material examined. – BHUTAN: 1 male, Rimchu trap No. 1, 7 Jun.2000, coll. C. Dorji et al.; 1 male, Rimchu trap No. 1, 14 Jun.2000, coll. Nado & Tshomo ; 1 male, Rimchu trap No. 1, 5 Oct.2000, coll. C. Dorji ; 1 male, Rimchu trap No. 2, 10 May.2000, coll. B.S. Fletcher ; 1 male, Rimchu trap No. 3, 4 May.2000, coll. B.S. Fletcher ; 1 male, Tsirang, 17 Jun.2000, coll. T.D. & S.D .; 1 male (10 May.2000), 1 male (17 May.2000), Lumitshawa, coll. C. Dorji; 2 males, Namling 14 km, 7 Jun.2001, coll. Brian Fletcher. All specimens attracted to cue lure. Specimens in NPPC and QDPI .

Diagnosis. – A large species; face fulvous with a pair of medium sized elongate oval black spots; postpronotal lobes yellow with inner margins narrowly black; notopleura either entirely dark fuscous to black or dark fuscous to black with small apical yellow spots; scutum shining black; narrow lateral postsutural vittae present; very short and narrow medial postsutural vitta present; mesopleural stripe reaching midway between anterior margin of notopleuron and anterior npl. seta dorsally; scutellum yellow with a broad medial longitudinal dark fuscous to black band or in some specimens a broad apical dark fuscous to black spot; wing with a narrow dark fuscous costal band extremely narrow or absent beyond apex of R 2+3 and widening into a distinct spot across apex of R 4+5 and a narrow fuscous cubital streak; a small diffuse fuscous spot around CuA 1 at hind margin of wing; cells bc and c colourless; microtrichia in outer corner of cell c only; abdominal terga III-V mostly dark fuscous to black with small red-brown spots posterocentrally on terga III and IV either side of a narrow medial longitudinal black band and redbrown across posterior margin of tergum V.

Attractant. – Cue lure.

Distribution. – Assam. New record for Bhutan.

Hosts. – No known record.

Remarks. – Bactrocera (Zeugodacus) assamensis White is similar to Bactrocera (Zeugodacus) biguttata (Bezzi) , Bactrocera (Zeugodacus) freidbergi White and Bactrocera (Zeugodacus) tappanus (Shiraki) in having two sc. setae and dark coloured notopleura. It differs from B. freidbergi in having dark patterns on the scutellum, from B. tappanus in having abdominal terga III-V mostly dark fuscous to black and femora uniformly black around apices, and from B. biguttata in having a medial longitudinal dark band on the scutellum, microtrichia on cell br of wing and cubital streak present. It is not a pest species.