new Species of Blattidae. 9 



surpassed by the subgenital lamina, which is trapezoidal and 

 furnished with two slender styles. Cerci slender. Legs 

 castaneous. 



Total length 6*2-7 mm.; length of tegmina 5-5'6 mm. ; 

 pronotum 1*8 x 2*5 mm. 



Lower Ogowe, between Lambarene and the sea (E. Ilaug, 

 1901). Two examples. 



Type in the Paris Museum. 



Allied to II. minutissima, de Geer, but distinguished inter 

 alia by the obsolescent venation. 



Genus Nymphrytria, nov. 



Form semiglobular. Antennae extremely short, incrassated ; 

 the first joint elongate, equal to one-quarter of the total 

 length of the antennae, the second and third joints as long as 

 broad, the remaining joints transverse. Frons above the 

 clypeus bullate. Body fringed with long stiff hairs. Pro- 

 notum anteriorly produced strongly, completely covering the 

 head, posterior margin convex. Posterior angles of seventh 

 abdominal tergite acutely produced. Cerci minute, hidden, 

 unjointed. Posterior tibiae subquadrangular, the spines on 

 the outer aspect biseriately arranged, those on the inner 

 aspect uniseriately arranged ; the spines serrated and grooved. 

 Tarsi slender, fimbriate, without pulvilli and without claws. 



Nymphrytria mirabilis, sp. n. (PI. I. fig. 4.) 



? . Pale testaceous, tibial spines castaneous. Antennae 

 with 32 joints. Eyes wide apart. Hairs fringing the body 

 testaceous. Pronotum finely granulate and with a few 

 minute hairs ; disc with two transverse impressions and a 

 faintly impressed median line. Meso- and metanotum and 

 the first three abdominal tergites smooth, nitid. Abdominal 

 tergites 1-6 finely granulate in the middle. Supra-anal 

 lamina rounded, margin entire, surpassing the subgenital 

 lamina, which is semiorbiculai', its posterior margin indented 

 on either side, the tuberculiform cerci visible in the notches. 

 Femora and tibiae short and robust, tarsi slender. Femora 

 armed on both margins beneath with a few minute spines, 

 the spines at the apical angles arranged in little groups of 3 

 or 4; no genicular spines. Front tibiae very short, with 8 

 apical spines and 1 free spine, the longest spine not equal to 

 the length of the first tarsal joint ; mid tibiae with 7 spines 

 on the outer aspect, biseriately arranged, 5 apical spines, no 

 spines on the inner aspect, the longest apical spine equal in 

 length to the tibia, but not so long as the first tarsal joint; 



