Mr. R. Shelford's Studies of the Blattidae. 319 



11. G. centitrio, Dohrn. 



Gyna centurio, Dohrn, Stettin Ent. Zeit., xlix, p. 129 

 (1888). 



A very distinct species on account of the opaque testa- 

 ceous or flavous macula in the mediastinal field of the 

 tegmina. 



Kamerun (Stettin Mus., type ; Oxford Mus.). 



12. G. sculpturata, sp. n. 



(J. Testaceous, tlie pigment evenly distributed. Eyes almost 

 touching on vertex ; a castaneous band between the ocelli. Antennae 

 piceous, 4-6 joints beyond the middle and 4 joints immediatelj^ 

 before the apex ochreous. Pronotum more strongly produced 

 posteriorly than usual, the process transversely striate, its apex and 

 border very narrowly piceous, disc with the usual lyrate marking. 

 Tegmina rather narrow, with variable jiiceous mottlings in the anal 

 field and at the apex, usually a piceous macula in the middle of the 

 disc, a line along the mediastinal vein at base and the anal vein 

 piceous, mediastinal area and costal margin beneath castaneous. 

 Wings hyaline, with the marginal field flavid, becoming castaneous 

 at apex, ulnar vein with 12 rami, 7 being incomplete. Abdomen 

 above and beneath and the legs flavo-testaceous. Supra-anal lamina 

 sub -bilobate, considerably exceeding the sub-genital lamina which is 

 small and asymmetrical, styles slender. Cerci small, 11 -jointed. 



5 , Similar, but much larger. Tegmina unicolorous, abdomen 

 beneath and legs rufo-castaneous. Distance of eyes apart rather less 

 than length of 1st antennal joint. Supra-anal lamina bilobed, ex- 

 ceeding the sub-genital lamina which is ample, produced, with sinuate 

 margins. 



(J. Total length 26 mm.; length of body 19 mm. ; length of 

 tegmina 19 mm. ; pronotum 6-2 mm. x 7"6 mm. 



$ . Total length 39 mm. ; length of body 33 mm. ; length of 

 tegmina 33 mm. ; pronotum 12 mm. x 13 mm. 



Kamerun (Berlin Mus., $ type ; Deutsches Entom. Nat. 

 Mus. ; coll. Bolivar) ; Benin (Oxford Mus., $ type) ; Togo 

 (Berlin Mus.). 



13. G. aetola, sp. n. 



(J . Eyes touching on vertex of head. Frons castaneous and con- 

 cave, vertex striate ; antennae castaneous at base, remainder fuscous. 

 Pronotum striate posteriorly and anteriorly, with the usual lyrate 

 marking on disc. Tegmina rufo-testaceous, mottled, a piceous spot 



