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Thread: Pelopidas agna or mathias female?

  1. #1
    Join Date
    Dec 2016
    Location
    Thailand
    Posts
    495

    Default Pelopidas agna or mathias female?

    This is somewhat similar to a post of other's from yesterday, which pointed to the difference between females of P. agna and mathias, as in the placement of the 1b spot. Unfortunately the 1b spot is not visible on this individual, although there's a good underside shot of both wings.
    Kimura states that the forewing spots on agna are larger, though this is not particularly obvious on specimens on Yutaka.

    My feeling is that this is agna, but would appreciate some comments or confirmation.
    Photographed October, Nan province, forest at 425 metres.
    With thanks.

    b8265 Bengal Swift (Pelopidas agna agna) 425 m - Huai Rong 01.JPG

    b8265 Bengal Swift (Pelopidas agna agna) 425 m - Huai Rong 02.JPG

  2. #2
    Join Date
    Nov 2010
    Location
    Malaysia
    Posts
    5,693

    Default

    Pelopidas assamensis.

    Large species.
    FW & HW spots are white or whitish.
    FW spots large, the two cellspots large. oblong. very close or joined.
    Antennal shaft with a prominent white band behind the club.
    https://www.ifoundbutterflies.org/#!...das-assamensis


    Small species.

    P. mathias ;Underside uneven shaded paler especially in the marginal zones.
    Male with FW spots 2 & 3 large, quadrate.
    https://4.bp.blogspot.com/-vqr7KmROf...perside_01.jpg
    https://3.bp.blogspot.com/-NQjrfm7_w...enedict_01.jpg
    https://www.butterflycircle.com/chec...hee%20Ming.jpg

    P. agna: Underside even/ uniformly brown.
    Male with FW spots 2 & 3 often rather narrow.
    https://www.ifoundbutterflies.org/me...oman_ag262.jpg
    https://www.butterflycircle.com/chec...Horace-Tan.jpg
    https://www.butterflycircle.com/chec...SwiftF-KSK.jpg



    TL Seow: Cheers.

  3. #3
    Join Date
    Dec 2016
    Location
    Thailand
    Posts
    495

    Default

    Many thanks for the details and clarification.

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