Macrocheilus immanis Andrewes, 1920

Zhao, Danyang & Tian, Mingyi, 2012, Taxonomic notes on the Macrocheilus Hope (Coleoptera, Carabidae, Helluonini) from Oriental Region, with description of one new species from the Philippines, ZooKeys 228, pp. 77-100 : 82-84

Macrocheilus immanis Andrewes, 1920 Figs 3, 11, 19, 27, 28, 45

Macrocheilus immanis Andrewes 1920: 498. Csiki 1932: 1574; Jedlička 1963: 469; Lorenz 2005: 512. Type locality: Myanmar (Taung-ngu), deposited in NHML.

Diagnosis.

Length 24.7 mm, width 8.3 mm. Labrum (Fig. 3) elongate, three pairs of equidistant setae on upper surface near margin; ligula thickened, apex slightly narrowed, slightly emarginate in middle of front margin, deeply depressed near apex to form a median channel, with five pairs of setae along sides, hollowed out above with a median carina; mentum (Fig. 11) with both tooth and lobes stout, tooth shorter than lobes, contracted after middle, irregularly setose on ventral surface on basal half; maxillary palpomere 4 (Fig. 19) dilated, densely setose; labial palpomere 4 dilated, palpomere 3 not dilated inwards. Elytal spots nearly square, large, near the middle, cover intervals 2-7.

Male genitalia. Median lobe of aedeagus strongly dilated and stout, strongly sinuate near paramere, straight towards apex, apical lamera elongate and narrowed at apex (Figs 27-28).

Remarks.

This species is similar to Macrocheilus niger and Macrocheilus asteriscus in having anterior setae of labrum obviously on upper surface, but differs from the other two species by the large and almost square elytral spots and stout median tooth of mentum.

Materials examined.

1 male, the holotype, labeled "Toungoo; Type; Macrochilus immanis , Type, Andr., H. E. Andrewes det.; Macrochilus immanis Andrewes, 1920", deposited in NHML.

Distribution.

Myanmar.