Mr. R. Shelford's Studies of the BlattidcV. 265 



5. Abdomen with transverse 



testaceous band above . . melana, Wlk. 

 5'. Abdomen with longitudinal 



vittte below tristicnla, St§,l. 



III. Some new Blattid^ 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. 



Ischnojjtera excavata, n. sp. (Plate XVI, fig. 11.) 



^. Fulvo-ferriiginous. 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 apes, 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. Cerci 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 ; 



