Bactrocera (Zeugodacus) scutellata (Hendel)

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 : 11

Bactrocera (Zeugodacus) scutellata (Hendel)

Dacus scutellatus Hendel, 1912: 20 , holotype male in DEI.

Dacus trivittatus – Matsumura, 1916: 411 (misident., see Shiraki, 1933: 82).

Dacus (Chaetodacus) bezzii Miyake, 1919: 146 .

Zeugodacus scutellatus – Shiraki, 1933: 82.

Dacus (Zeugodacus) scutellatus – Hardy, 1977: 59; Tseng et al., 1992:74; Wang, 1996: 71.

Bactrocera (Zeugodacus) scutellata – Liang et al., 1993: 138; Norrbom et al., 1998: 103.

Material examined. – BHUTAN: 1 male (19 Jul.2000) , 1 male (16 Aug.2000), Rimchu trap No. 1, coll. C. Dorji; 2 males, Rimchu trap No. 1, 23 Jul.2000, coll. C. Dorji et al. All specimens attracted to cue lure. Specimens in NPPC and QDPI .

Diagnosis. – A large species; face fulvous with a pair of medium sized circular black spots; postpronotal lobes and notopleura yellow; scutum shining black; lateral and medial postsutural vittae present; mesopleural stripe reaching midway between anterior margin of notopleuron and anterior npl. seta; scutellum yellow with a black apical spot; wing with a narrow fuscous costal band confluent with R 2+3 and remaining narrow beyond apex of this vein before expanding across apex of R 4+5, a broad fuscous cubital streak, pale fuscous along dm-cu crossvein; cells bc and c colourless; microtrichia in outer corner of cell c only; abdominal terga III-V each with a dark fuscous to black ‘T’ pattern.

Attractant. – Cue lure.

Distribution. – Distributed across subtropical southeast Asia. New record for Bhutan.

Hosts. – Flowers of species in the Family Cucurbitaceae (see Allwood et al., 1999).

Remarks. – Bactrocera (Zeugodacus) scutellata (Hendel) is a large species readily distinguished by the shining black scutum, lateral and medial postsutural vittae broader than in B. scutellaris (Bezzi) , face with circular black spots, scutellum yellow with a black apical spot, femora entirely fulvous, 4 sc. setae, wing with a strong supernumerary lobe and broad cubital streak, costal band confluent with R 2+3 and remaining narrow beyond apex of R 2+3 before widening gradually across apex of R 4+5, abdominal terga III-V each with a separate general ‘T’ pattern. As for B. diversa (Coquillett) and B. scutellaris , B. scutellata attacks flowers of some Cucurbitaceae species so may have pest status but no quarantine significance for export trade.