Genera and Species of Blattidee. 161 
radial vein bifurcate from near base, costal veins absent, 
anterior ulnar simple, posterior ulnar simple or bifurcate, anal 
field much reduced, anal vein straight, oblique, one axillary 
vein. Wings similar in size, texture, and pubescence to the 
tegmina; posterior part of the wing reduced to a small lobe, 
not pubescent, with one obsolescent axillary vein; radial 
vein simple, no costal veins ; median vein bifurcate from near 
base, its anterior branch bifurcating near apex; ulnar vein 
bifurcate. Vena spuria present in both tegmina and wings. 
Supra-anal lamina subquadrate, posterior border arcuately 
emarginate. Subgenital lamina rounded, slightly irregular, 
without styles. Cerci elongate, nine-jointed, apical joint 
acuminate. Legs slender, long; tibix sparsely spined, the 
spines on the posterior pair biseriately arranged ; femora with 
genicular spines; tarsal claws minute, without arolia; no 
pulvilli; posterior metatarsus longer than the remaining 
joints. 
Cardax wiley, sp.n. (Pl. IX. figs. 3-7.) 
3. Fusco-hyaline ; tegmina with a slight iridescent sheen ; 
legs testaceous. Front tibie with four apical spines, other- 
wise unarmed ; mid tibize with two spines near the base and 
three apical spines ; hind tibiz with four spines along the 
outer border and three apical spines. 
Total length 5°9 mm.; length of body 3:8 mm.; length 
of tegmina 5 mm.; greatest breadth of tegmina 2 mm. 
Peradeniya, Ceylon (A. Walley); several specimens. 
Type in the British Museum; co-type in the Oxford Museum. 
This is certainly one of the most remarkable cockroaches 
known. In general appearance it is far more like a small 
Neuropterous insect than like an Orthopteron, an effect 
brought about by the similar texture and pubescence of the 
tegmina and wings; this is a feature shown, to a limited 
extent, by the genus Homopteroidea, mihi, but by no other 
genera in the family. In the subfamily Corydiina the poste- 
rior part of the wing does not fold up in a fan-like manner, but 
merely doubles under the anterior part, which leads in some 
instances to a reduction in size of the posterior part, so that 
it becomes equal in size or even smaller than the anterior 
part. In Cardaw the reduction has proceeded so far that the 
posterior part of the wing is represented merely by a small 
functionless lobe ; and it is interesting to note that, correlated 
with this reduction, is a parallel reduction of the anal field of 
the tegmina. The anterior part of the wings is relatively 
much larger than is usual in Blattide. The venation of the 
Ann. & Mag. N. Hist. Ser.-8. Vol. i. Tt 
