Sumba exilis, Popov †, George B., Fishpool, Lincoln D. C. & Rowell, C. Hugh F., 2019

Popov †, George B., Fishpool, Lincoln D. C. & Rowell, C. Hugh F., 2019, A review of the Acridinae s. str. (Orthoptera: Acridoidea: Acrididae) of eastern Africa with taxonomic changes and description of new taxa, Journal of Orthoptera Research 28 (2), pp. 37-105 : 49-50

Sumba exilis sp. n. Figs 65A, 77A, 82-85, 88A

Material.

-Holotype male, CAMEROON: Scarp at Ngaoundéré, 23-27.Xl.1980, Jago and Popov; l male, 1 female paratypes, same data. UGANDA: l female, Mbarara, 1.1934, Johnston (NHMUK).

Description.

-Head and thorax coarsely sculptured in ridged shiny callosities and intervening furrows (Figs 82-83). Antennae moderately widened in basal third, cylindrical apically, in males slightly longer and in female shorter than combined length of head and pronotum. Head acute, face oblique, straight to weakly concave in profile; frontal ridge with well-defined margins, fastigial constriction marked. Fastigium longer than wide in both sexes, margins and medial carinula linear and distinct, arcuate sulcus in mid position (Figs 82-83). Dorsum of pronotum regularly tectiform, hind angle broadly rounded, carinae low but distinct; only typical and second sulci distinct; metazona/prozona ratio 2:3. Mesosternal lobes in both sexes weakly transverse, interspace longer than broad; metasternal interspace closed. Tegmina narrow, tapering and down-curved apically; venation and reticulation sparse, intercalary vein absent (Fig. 77A). External genital structures unspecialized, as in S. roseipennis . Phallic structures exceptionally small. Coloration in shades of light brown and stramineous, paler dorsally. Hind wings hyaline. Hind legs color of body; tibial spines black tipped. Table 4 gives morphometric data for exilis .

Distribution.

-Known to date only from CAMEROON and UGANDA. Quite possibly, the real distribution may be less disjunct than this suggests.

Discussion.

-Similar in size to S. roseipennis , but more slender build, sculpturing of dorsum of pronotum and colorless wings.