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.