Alurnus, Fabricius, 1775

Staines, C. L., 2013, A review of the genus Alurnus Fabricius, 1775 (Coleoptera: Chrysomelidae: Cassidinae), Insecta Mundi 2013 (291), pp. 1-34 : 3

Key to the species of Alurnus

1.

— Pronotum setose (at least laterally) ................................................................................................. 2 Pronotum glabrous ............................................................................................................................. 9

2(1).

— Elytra distinctly costate ( Fig. 4, 5, 12) ............................................................................................ 3 Elytra not distinctly costate ( Fig. 1-3, 6-11, 13-22) ........................................................................ 5 3(2).

— Vertex of head setose; each elytron with 6 costae; head, antenna, pronotum, scutellum, legs, and venter black; elytra yellowish-brown at base, dark red apically; total length 33- 28 mm; Colombia, Ecuador; Fig. 6......................................................................................... A. costalis Rosenberg

Vertex of head not setose; each elytron with 4 or 5 costae ............................................................ 4 4(3).

—

Elytral interspaces finely punctate; front of head rugose; head, pronotum, scutellum, and legs black; elytra yellow with suture, four costae, and basal margin black; total length 33 mm; Colombia; Fig. 5................................................................... A. chapuisi Uhmann and Jolivet

Elytral interspaces moderately punctate; front of head not rugose; head, antennae, pronotum, scutellum, venter, and legs black; elytra yellow with large blue-red spot on apical half; total length 24-30 mm; Ecuador; Fig. 12................................................................ A. horni Uhmann

5(2).

—

Vertex of head setose; head, antennae, pronotum, scutellum, venter (epipleuron may be pale), and legs black; elytra dark blue-black with yellowish-brown markings: basal spot from scutellum to humerus, oblique transverse band from lateral margin below humerus to suture, band on apical quarter; total length 25 mm; Bolivia, Peru; Fig. 16.................... A. obliquus Uhmann

Vertex of head not setose.................................................................................................................... 6

6(5).

—

Sutural angle of elytra with small tooth .......................................................................................... 7

Sutural angle of elytra without small tooth; head, antennae, scutellum, legs, and venter (except abdominal sterna laterally) black; pronotum yellow with disc black from base to apex; elytra yellow with black humeral vitta, apical margin black, suture black, and black spot on disc after middle; some specimens with large black spot on apical half of elytra; total length 19-22 mm; Ecuador; Fig. 15a, 15b....................................................................... A. mutabilis Waterhouse

7(6).

—

Vertex of head rugose; head, antennae, scutellum, legs, and venter (except apical third of last abdominal sternite) bluish-black; pronotum reddish with apical and basal margins black; elytra yellow with black sutural vitta, black submarginal vitta, black oblique humeral vitta and black macula near end of humeral vitta; total length 20-24 mm; Brazil, Colombia, Venezuela; Fig. 14......................................................................................................................... A. lansbergei Sallé

Vertex of head punctate ...................................................................................................................... 8

8(7).

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