Morgenia rubricornis Sjoestedt, 1913 Figs 2, 10, 14, 20, 28, 35, 36

Morgenia rubricornis Sjöstedt, 1913. Ark. Zool. 8 (6): 4.

Morgenia rubricornis Type locality: Mukimbungu (Democratic Republic of the Congo) (NHRS Stockholm).

Material examined.

Central African Republic, Dzanga-Ndoki National Park, (light) 22.X.2008 (light), P. Annoyer (1♂); same data 24.II.2012 (light), P. Annoyer (1♂); 31.I.-29.II.2012 (11♂, 1♀) (light), Sangha2012 team ; Gabon, Lope National Park Res. Station, Ogooue-Ivindo 28-31.III.2014 (light), (2♂, BOLD LopeORT14-617 and -673) (light), ecotrop 2014 team ; Ivory Coast, Korhogo, Kogo 21.VII.2014 (1♂) (light), P. Moretto; Man Mt. Tonkoui (1200 m) 28.VI-1.VII.2014, 18-20.VI.2015 (2♂) (light), P. Moretto; Touba, Biémasso 10-11.VII.2013 (1♂) (light), P. Moretto; Taei National Park , Res. Station 20.III.2017 (light), B. Massa (1♂) (BMPC) .

Distribution.

M. rubricornis was known only from the type locality; however, it has also been found in Central African Republic, Gabon and Ivory Coast (see material examined). Thus, its distribution probably covers central and western tropical Africa.

Remarks.

According to Sjöstedt (1913), M. rubricornis was the largest species of the genus known at that time. He also reported measurements of the length and width of the tegmina (39.0 and 12.0) of the holotype; even if his values are much higher than those of specimens measured by us, the ratio length/width of the tegmina (3.25) lies within the variability observed in this taxon (Table 1). The male of this species is easily identifiable by its dark spot in the left tegmen; it has a larger base and a narrower tip than that of M. hamuligera (compare Figs 9, 10, 14). The mirror of the right tegmen is smaller than in M. hamuligera (Fig. 10). Antennal segments are generally reddish (from this character the name Morgenia rubricornis). The pattern of the costal area of the tegmina has regularly spaced crossveins (Fig. 10). The inner ventral spur of the mid tibiae is short, more or less directed upwards and reaches the middle of the first tarsal article; its length is about 4.5-5.0% of the tibia length. On the outer ventral margin of the mid tibiae, three close short spines are present (Fig. 28). The stridulatory file is 2.2 mm long, arched and composed of ca. 60 dense and evenly spaced teeth in the proximal part, followed by ca. 50 widely spaced teeth in the distal part (Fig. 20). The subgenital plate of the male in ventral view is very similar to that of M. hamuligera, while, in the lateral view, it appears more upwards bent (compare Figs 35-36 with 37-38).