Pheropsophus bimaculatus,

Venugopal, Akhil S. & Thomas, Sabu K., 2019, Bombardier beetles of the genus Pheropsophus Solier 1833 (Carabidae: Brachininae: Brachinini) from Indian subcontinent, Zootaxa 4608 (1), pp. 65-89: 68-70

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Pheropsophus bimaculatus


Pheropsophus bimaculatus  ( LINNAEUS, 1771)

( Fig. 1 CView FIGURE 1, 5 CView FIGURE 5)

Ssp. Pheropsophus bimaculatus posticalis ARROW, 1901  Carabus bimaculatus Linnaeus, 1771: 532  ; Fabricius, 1775: 243; Olivier, 1795: 65; Dejean, 1821: 3; 1825: 299; Hope, 1838:

100; Motschulsky, 1855: 55; Redtenbacher, 1844: 5; Chaudoir, 1876: 34; Bates, 1886: 200; Andrewes, 1919: 120; 1921a:

153; 1923(1924b): 460; 1930: 271. Ssp. Pheropsophus bimaculatus posticalis Arrow, 1901: 204  ; Andrewes, 1919: 198; 1930: 271.

Specimens examined (n=51): Holotype, labelled “ bimaculatus  ”, type in LSUK

Other specimens examined: 43 exs., India: Kerala: Nilambur , 28.II.2016, Hand picking (under stones), coll. S.V. Akhil  ; 3 exs., India: Kerala: Palakkad , 26.XI.2017, Hand picking (paddy field), coll. M. Divya  ; 4 exs., India: Tamil Nadu: Coimbatore  .

Description. Length: 15.8–17.5 mm; TW: 6.2–7.3 mm

Colour: Head yellow; pronotum disc and lateral margin brownish black, with a yellowish spot, oblong, more or less large, placed on each side along the lateral margin; elytra black with yellow spots; antennae, legs yellow; antennal segments 1–4 of lighter shade; underside of body blackish brown; eyes brownish.

Head: With a dark spot somewhat elongated towards the apex extending to the pronotum; two weak longitudinal impressions between the antennae; antennae about half the length of the body; eyes not protruding.

Pronotum: Subcordiform; contracted posteriorly; apical and basal margins straight; hind angles right angled, not protruding; median furrow distinct; a few scattered deep punctures on disc.

Elytra: Nearly twice as wide as pronotum; enlarged towards apex, straight truncated at apex; striations wide, rounded, intervals flat; humeral spot rounded; transverse band rounded with weakly serrated edges; apical yellow band narrow, extends anteriorly along each striation.

Geographical distribution. INDIA: Tamil Nadu: Anaimalai Hills, Kodaikanal, Thirunelveli, Chennai, Coimbatore, Ramanathapuram, Chengalpattu, Madurai, Thiruchirapalli ( Andrewes 1930); Pondicherry ( Andrewes 1930); Kerala: Travancore ( Andrewes 1930), Nilambur (New record), Palakkad (New record); Karnataka: Mysore: Chikkabellapura ( Andrewes 1930); Maharashtra: Pune ( Andrewes 1930); SRI LANKA: Kitugalle ( Bates 1886). Udagama ( Andrewes 1930). Weligama ( Andrewes 1930). Colombo ( Andrewes 1930). Elephant pass ( Andrewes 1930). Avisawella ( Andrewes 1930).

Remarks. In the subspecies P. bimaculatus posticalis  the elytral transverse band has united with the humeral spot and covers two-thirds of the elytra, the posterior third of elytra, the sutural line (expanded below the scutellum) and two vestiges below the humerus are black.