Brachinus vigilans Chaudoir, 1876

Akhil, S. V., Divya, M. & Sabu, K. Thomas, 2020, Bombardier beetles of genus Brachinus Weber, 1801 (Carabidae: Brachininae Brachinini) from India, Zootaxa 4816 (4), pp. 576-600 : 594

Brachinus vigilans Chaudoir, 1876

Fig. 3c

Brachinus vigilans Chaudoir, 1876: 68 ; Bates, 1891: cccxxxvi; Andrewes, 1930a: 53.

Type locality. India: North India, coll. Dr. Bacon.

Type depository. MNHN .

Specimen examined (n=1). Syntype labelled “‘Ind.or.bor’, coll. Dr. Bacon, det. Chaudoir.

Description. Length 7.5 mm. Head, pronotum, first two antennal segments, scutellum, region around scutellum and sutural line dark reddish yellow; antennal segments 3–11 dark reddish brown; legs pale reddish yellow; eyes greyish black; lateral margin of pronotum dark brown; elytra brownish black.

Head stout, wider than long, rough, punctated, pubescent; eyes moderately protruding; antennae short, segments stout, not reaching the middle of elytra, antennal segment 3 shorter than segment 1.

Pronotum broad, wider than long, rough, matt, punctated, pubescent; disc with apical margin outwardly sinuate, lateral region of apical margin projecting slightly forward, basal margin straight; disc laterally with anterior threefourths convex, posterior fourth divergent, hind angle blunt, obtuse, projecting laterally; median groove shallow, not reaching the apical and basal margins; lateral bead broad.

Elytra convex, matt, punctated, densely pubescent, with golden brown short setae; base narrowed, humerus rounded; apex without re-entrant angle; scutellum long, pointed; striations moderate, shallow, narrow, intervals broad, both striations and intervals covered by setae; sutural line narrow, widest at base, narrowing suddenly after the tip of scutellum, extending till apex.

Distribution. INDIA: Jharkhand: Tetara; Maharashtra: Nagpur; Tamil Nadu: Chennai.

Figures

FIGURE 3. Dorsal habitus of Indian Brachinus species (cont.): a) B. stevensi Andrewes, 1924 (holotype, BMNH); b) B. suturellus Chaudoir, 1876 (syntype, MNHN); c) B. vigilans Chaudoir, 1876 (syntype, MNHN)