324 Mr. R. Slielford's Studies of the Blattidae. 



Africa" (British Mus., type of scripta ; Oxford Mus., Bo7'- 

 mans example)', Lake N'gami {Castelnau), {Qxitish Mus., 

 type of consjncua ; Oxford Mus.) ; S. W. Africa, Amboland 

 (G. ScU7iz), (Senckenberg Mus.) ; German S.W. Africa, 

 Otjosondu (Berlin Mus., type ot stridulans). 



21. G. aiirivillii, Borg. 



Gyna cmrivillii, Borg, Bib. Svensk. Vet.-Akad. 

 'Handl, xxviii, Afd. 4, No. 10, p. 20, W. II, f. 5 (1902). 



This is very close to the preceding species, but the eyes in the 

 (J are closer together and in both sexes the tegmina have no 

 rufescent macula on the disc of the tegmina, there is however a 

 consj^icuous piceous spot l^etween the radial and mediastinal veins 

 which is reduced or absent in caffronmi. The fusing of the lyrate 

 markings on the vertex is a variable character. 



$. Total length 27 mm.; length of body 23 mm.; length of 

 tegmina 24 mm. ; pronotum 8-4 mm. x 9"4 mm. 



Kamerun (Stockholm Mus., type ; Berlin Mus.). 



22. G. hyalina, sp. n. 



2 . Clear testaceo-hyalino, head and antennae, abdomen and legs 

 rufo-castaneous. Eyes close together on vertex (less than 1 mm. 

 apart). Pronotum anteriorly and posteriorly faintly striate, lyrate 

 markings on disc castaneous and fused together. Tegmina moder- 

 ately broad, immaculate, mediastinal field at base, mediastinal and 

 anal veins castaneous. Wings with costal margin suffused with 

 flavid, ulnar vein with 17 rami, 11 being incomplete. Supra-anal 

 lamina deeply bilobate, sub-genital lamina of the usual form. 

 Formula of apical spines of the femora, f , J, \ ; no genicular spine 

 on front femora. 



Total length 24 mm. ; length of body 17*8 mm.*; length of 

 tegmina 20 mm. ; pronotum 6'9 mm. x 8 mm. 



Congo Free State, Iringui (Musee du Congo); Vic- 

 toria Nyanza, Bugala, Sesse Archipelago {E. Bay on), 

 (Genoa Mus.). 



Readily distinguished by the peculiar hyaline appear- 

 ance of the pronotum and tegmina ; also by the approxi- 

 mation of the eyes, an unusual feature in the females of 

 this grenus. 



