. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Fauna and Stratigraphy of the Series. 333 are differences, too, from the genotype T. tijpica in the number of branches of R, M, and Cu. From Samaroblatta it differs in the shorter and narrower humeral area, in that the distal portion of R probably reached the apex. In other points it approaches fairly closely to this genus, especially in the possession of intercalated ridges and a cross-venation. The difference in branching of R, M, and Cu is not of great moment; Tillyard has pointed out th
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Fauna and Stratigraphy of the Series. 333 are differences, too, from the genotype T. tijpica in the number of branches of R, M, and Cu. From Samaroblatta it differs in the shorter and narrower humeral area, in that the distal portion of R probably reached the apex. In other points it approaches fairly closely to this genus, especially in the possession of intercalated ridges and a cross-venation. The difference in branching of R, M, and Cu is not of great moment; Tillyard has pointed out that not only different individuals of the same species of Cockroach, but also even the right and left tegmina of the same individual, show considerable differences in this Fig. 3. Striatotegmen africanum, Htn. Venation of tegmen. From Austroblatta, with which it agrees in size, it differs in the smaller humeral area, the pronounced bending of R, and the pre- sence of intercalated veins. In general characters it agrees closely with Mesoblattula from the Lias of Mecklenburg. It shows the same reduced subcosta; the hu- meral area shorter than the anal, the same strongly double-curved radius, and the same general features of M and Cu As in Meso- Uatiula there are intercalated ridges, and evidence of occasional cross-venation (cf. M. geinitziana). Unfortunately the anal area is unknown in the genus Mesoblattula. Our form differs from this genus in that the anterior branch of the medial is apparently not forked; in this it differs also from Mesoblattopsis, Liadoblattina, Rhipidoblat- tina and Caloblaitina, and apparently agrees with Mesollatlina. It agrees also with Mesoblattina in the reduced humeral area and the simple subcosta; but the area covered by the radius is larger in the South African form, the radius is more strongly curved, and there are fewer primary branches. The tegrnen, too, is somewhat broader. Two genera of this family have been described from the "Rh
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