G50 Mr. R. Shelford on the Studies of the Blattidae. 



Theganopteryx obscura, Shelf. 



Theganopteryx obscura, Shelford, Rev. Zool. Afric. i, 

 fasc. 2, p. 199 (1911). 



£ . Uniform tlavo-testaceous. Head castaneous, antennae fuscous ; 

 eyes piceous, their distance apart on vertex of head nearly equal to 

 1st antennal joint. Pronotum posteriorly produced very obtusely. 

 Tegmina with 23 costals, radial and anterior ulnar veins simple, 

 7 discoidal sectors. Wings faintly suffused with ochreous, media- 

 stinal vein simple, 15 costals, medio-discal area in middle about 

 four times broader than medio-ulnar area, crossed by about 15 

 transverse venules, ulnar bifurcate, the rami joining at their apices, 

 a prominent triangular apical area. Scent-gland openings on the 

 2nd and 7th abdominal tergites ; supra-anal lamina trigonal, sur- 

 passed by the subgenital lamina which is produced, symmetrical, 

 posteriorly emarginate and furnished with 2 minute styles. Cerci 

 short, sub-acuminate, situated close together at base. 



$. Tegmina with the discoidal field and the disc of the abdomen 

 beneath castaneous, supra-anal lamina triangular, cerci longer and 

 more slender. 



Total length ($) 11-1 mm., (?) 11-5 mm.; length of body (£) 

 10 mm., (?) 8-5 mm. ; length of tegmina {<$) 9-1 mm., ($) 9*1 

 mm. ; pronotum 3 mm. x 3*5 mm. 



Hob. Congo State, West of Kambove, 3,500'-4,50fk 

 (S. A. Neave) (British Mus.), S.E. Katanga (S. A. Neave } 

 (British Mus., Oxford Mus.), Kapema-Kipaila {Sheffield 

 Neave) (Musee du Congo) ; N.E. Rhodesia, Serenje Dis- 

 trict (S. A. Neave) (British Mus.), Chisinga plateau (Oxford 

 Mus., types) ; Portuguese E. Africa, Kurumadzi River 

 (0. F. Swynnerton, Oxford Mus.). 



Theganopteryx gambiensis, Shelf. (Plate LXXIX, fig. 4.) 



Theganopteryx gamliensis, Shelford, Trans. Ent. Soc. 

 London, 1906, p. 236. 



<$ . Head castaneous ; antennae fuscous, ciliate. Pronotum cas- 

 taneous, anteriorly and laterally margined with testaceous. Tegmina 

 and wings exceeding the apex of the abdomen. Tegmina fiavo- 

 hyaline, outwardly margined with hyaline, 10 costals the last two 

 ramose, radial vein simple, anterior ulnar 3-ramose, 8 discoidal 

 sectors. Wings with anterior part faintly suffused with castaneous, 

 mediastinal vein 4-ramose, radial vein simple, 8-9 costals, slightly 

 incrassated, ulnar vein bifurcate, the rami reuniting at apex, not 



