Genera and Species of Blattide. 167 
punctate; eyes very close together; antennee and labrum 
castaneous, maxillary paipi rufo-testaceous ; ocelli not visible. 
Pronotum above with disk rugose, punctate and anteriorly 
tuberculate ; anteriorly obtusely carinate, anterior margin 
reflected slightly, lateral bands anteriorly deflected down- 
wards, but not so much as in Bantua ferox; the channel 
between the disk and the lateral bands wide and shallow; 
posteriorly the lateral bands are produced as in Pilema 
dentata, Sauss. & Zehnt.; posterior margin dentate. Meso- 
and metanotum cribrate-punctate, with smooth interspaces 
and a median carina, posterior angles slightly produced. 
Abdomen not wider than thorax, obsoletely punctate above 
and beneath; an anterior zone on each tergite and sternite 
impunctate ; supra-anal lamina trapezoidal. Cerci and legs 
castaneous. 
Total length 28 mm.; pronotum 8°5 x 8:9 mm. 
Mombasa (1 @ ). 
‘l'ype in the British Museum. 
‘The species is in its pronotal structure intermediate between 
Bantua ferox and typical Pilema. 
Genus CyrToTria, Stal. 
Stenopilema, Sauss. Ann. Mus. Civ. COUUNES xxxv. p. 87 (1895) ; Sauss. 
& Zehnt. Rev. Suisse Zool. iii. p. 25 (1895). 
Lhysanoblatta, Kirby, Ann. & Mag, Nat. Hist. (7) xii. p. 880 (1903). 
The type of the genus is C. gibbicollis, Stal, and this species 
is undoubtedly congenerie with the species included in Steno- 
pilema by de Saussure and Zehntner. Thysanoblatta was 
founded on a species characterized by an erect pubescence, 
but otherwise differing in smail details only from typical 
species of Stenopilema ; and | have no hesitation in sinking 
it as a synonym of Cyrtotria, ‘There has been an excessive 
multiplication of genera in this subfamily of Blattide, and 
much contusion has resulted therefrom. 
‘The species of Cyrtotria are very difficult to identify from 
descriptions, for it 1s not easy to express in writing the subtle 
differences in the form of the pronotum presented by the 
different species. I have examined nearly all the types, and 
have drawn up a synoptical key to the species, which, 
together with the figures, will I hope render the determination 
of the species easier than heretofore. 
‘L'wo species of the genus, C. latipennis, Kirby, and C. palli- 
cornts, Kirby, present a remarkable modification of the 
pronotum, which appears to have been overlooked by the 
deseriber. ‘The disk of the pronotum on each side is perfo- 
