Mr. R. Shelford's Studies of the Blattidae. 325 



23. G. colini, Rochebr. 



Gyna colini, Rocliebrune, Bull. soc. philomath., ser. 7, 

 vii, p. 176 (1883). 



The description is useless for purposes of identification, 

 and I cannot obtain the type. 



Senegambia. 



Genus Pseudogyna, nov. 



Allied to Oi/na, Br., but differs as follows : — pronotum posteriorly 

 less strongly produced ; tegmina and wings not exceeding apex of 

 abdomen ; cerci very short and obscurely articulated ; posterior 

 metatarsus very long, considerably exceeding the succeeding joints, 

 biseriately spined beneath. 



The genus is intermediate between Gyjia and Fhena- 

 cisma. 



P. intermedia, sp. n. 



5. Head piceous, genae and mouth -parts testaceous. Eyes rather 

 wide apart. Pronotum testaceous with a discoidal piceous lyrate 

 marking, posteriorly produced but much less so than in Gyna and 

 Phenacisma. Tegmina not quite extending to apex of abdomen, 

 castaneous, mediastinal field testaceous, venation well marked, 

 mediastinal vein piceous. Wings of equal length with tegmina, 

 anterior part .semi-coriaceous, posterior part slightly reduced, ulnar 

 vein ramose. Abdomen mottled with testaceous and piceous ; supra- 

 anal lamina quadrate, apex emargiuate ; sub-genital lamina semi- 

 orbicular, ample. Legs castaneous. 



Length 25 mm. ; length of tegmina 19*5 mm. ; pronotum 7'1 mm. 

 X 10 mm. 



N.E. Rhodesia, Hills near Fort Jameson, 4,000-5,000 ft. 

 (/S'. A. Neavc), (Oxford Mus.). 



In colouring the species is very like the next. 



Genus Phenacisma, Karsch. 



Phenacisma semialata, sp. n. (PI. IX, fig. 38.) 



5 Allied to P. 2)eltata, Karsch, but smaller and less convex, 

 tegmina coriaceous not semi-corneous, more rounded at apex, anal 

 vein well marked, wings larger. Head piceous, a band between the 



