. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Records and Descriptions of Acrididae from South West Africa. 47 and irregular, parallel in front of the first sulcus, divergent behind it, obsolescent in metazona. Median carina very distinct throughout, linear. The typical sulcus well developed, the other two feeble. Hind angle obtuse, rounded. Elytra reaching the hind knees, broad. Venation (fig. 2) very like that in P. cephalica, Bol. (see Uvarov, , fig. 1a), but the externo- median area narrowed apically, the interradial area narrower. Hind
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Records and Descriptions of Acrididae from South West Africa. 47 and irregular, parallel in front of the first sulcus, divergent behind it, obsolescent in metazona. Median carina very distinct throughout, linear. The typical sulcus well developed, the other two feeble. Hind angle obtuse, rounded. Elytra reaching the hind knees, broad. Venation (fig. 2) very like that in P. cephalica, Bol. (see Uvarov, , fig. 1a), but the externo- median area narrowed apically, the interradial area narrower. Hind femora relatively short and thick. The two inner spurs of hind tibiae not very difierent in size. Coloration as in P. cephalica. Antennae blackish. Apical joint of maxillary palpi blackish-brown. Pronotum with a broad pale median stripe, included between two irregular blackish lines. Elytra slightly infumate throughout, more distinctly so in the apical part ;. Fig. 2.—Prostethophyma crassicornis, sp. n., (^. Antenna, palpi, and elytron. scapular area with a pale yellowish streak in the basal part ; basal portions of radial veins blackish. Wings rather broadly infumate at the apex. Hind femora orange coloured, with three grey spots above ; knees broadly blackened all over ; hind tibiae orange. Length of body, 16-5 ; pronotum, 4; elytra, 13 ; hind femur, 10 mm. A single male from Kaross, South West Africa, February 1925 (South African Museum). The structure of the head in this species is very remarkable, since there are no foveolae of the vertex, which are more or less developed in other species of the genus. This is due obviously to the unusual narrowness of the vertex, and there is no reason to suggest that P. crassicornis should be removed from the genus. Indeed, P. platypternoides has the foveolae only faintly indicated by a series of punctures, and occupies in this respect a position intermediate between other congeners and P. crassicornis. Other interesting features of th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
