616 Mr. R. Shelford on the Studies of the Blattidae. 



the specimen I recognised its identity with a long series 

 of the same species in the Genoa Museum collection, then 

 in my hands, which came from West Africa, and I have 

 no doubt that Brunner's type was taken, as were many 

 other species in the Stettin Museum described by the 

 same author, in Old Calabar. The genus being a critical 

 one I made a very careful examination of the type and 

 of the Genoa specimens, and in course of time arrived at 

 the conclusion that the genus was far more limited in 

 scope and in its geographical distribution than had 

 been supposed by the authors who followed Brunner. 

 Thcganopteryx is in fact confined, so far as our present 

 knowledge goes, to Tropical Africa. The majority of 

 species which by other authors as well as by myself have 

 been referred to this genus belong in reality to the almost 

 cosmopolitan genus Hcmithyrsoccra, Sauss., but for the 

 Malagasy species of Tlicganoptcryx. I have recently erected 

 the new genus Evihegmiopteryx. In the following revision 

 I have thought it advisable to describe at some length 

 every species of the genus, it is certainly convenient to 

 have under one cover a complete conspectus of a genus. 



Genus Theganopteryx, Br. 



Theganopteryx, Brunner v. Wattenwyl, Nouv. Syst. d. 

 Blatt, p. 53 (1865) ; Saussure, Mem. Soc. Sc. Phys. Nat. 

 Geneve, xx, p. 229 (1869) ; Saussure and Zehntner, Biol. 

 Centr.-Amer. Orth., i, p. 16 (1893). 



Sexes similar. Antennae setaceous. Pronotum trapezoidal. 

 Tegimna extending beyond the apex of the abdomen ; costals 

 regular, radial vein simple, discoidal sectors longitudinal, anterior 

 ulnar usually simple, posterior ulnar multiramose. Wings fully 

 developed ; mediastinal vein 3- 5 -ramose, rarely simple, costals 

 regular, incrassated, radial vein simple, ulnar vein simple or 

 bifurcate running close to the vena dividens, the interspace seldom 

 crossed by transverse venules, its apex bent up and frequently 

 failing to reach outer margin of wing impinging on the boundary 

 of the apical triangle, medio-discal area 3-4 times broader in the 

 middle than the medio-ulnar area. Triangular apical area well- 

 defined, prominent, clearly marked off from rest of wing. Supra- 

 anal lamina variable but typically trigonal. Sub-genital lamina 

 ( (J ) more or less asymmetrical. Femora moderately armed beneath ; 

 front femora on the anterior margin beneath armed according to 



