Mr. R. Shelford’s Studies of the Blattide. 265 
5. Abdomen with transverse 
testaceous band above . . melana, Wlk. 
5’, Abdomen with longitudinal 
vitte below. . . . . .. tristicaa, Stal. 
III. Some NEW BLATTIDZ FROM SARAWAK, BORNEO, 
IN THE Hope DEPARTMENT, OXFORD UNIVERSITY 
MUSEUM. 
Mr. J. Hewitt, Curator of the Sarawak Museum, 
recently forwarded to me for determination a small col- 
lection of cockroaches ; thirteen of the species appear to 
be new to science and are described below. The re- 
discovery of the species described by Serville as blatta 
decorata is of some interest. The numbers attached by 
Mr. Hewitt to his specimens are quoted in square 
brackets. 
Genus ISCHNOPTERA, Burm. 
Ischnoptera excavata, n. sp. (Plate XVI, fig. 11.) 
¢. Fulvo-ferruginous. Eyes closer together than the antennal 
sockets. Pronotum trapezoidal, sides deflexed, posterior margin 
obtusely angled. Tegmina with the radial vein bifurcated near 
base, seventeen costal veins, seven discoidal sectors. Wings hyaline, 
marginal field and veins ferruginous, mediastinal vein with 
five branches, radial vein bifurcated, eleven costal veins, ulnar 
vein sending four rami to apex, two to dividing vein, first axillary 
vein tri-ramose. Anterior femora with anterior margin beneath 
strongly spined, the proximal spines longer than the distal ; all the 
femora with apical spines on both margins and with genicular 
spines. Supra-anal lamina profoundly modified, proximally it 
is deeply depressed with a median elevated carina, so that two 
wide pits are formed which are directed forwards beneath 
the preceding tergum, posterior margin of the lamina rounded, 
slightly emarginate. Sub-genital lamina of normal shape, but 
without styles. Cerei moderate. 
Total length 21 mm. ; length of tegmina 17 mm. 
KucHING (March 1899). One example [No. 32]. 
I know of no other species of Blattid in which so 
extensive a modification of the supra-anal lamina occurs ; 
