Mr. R. Shelford's Studies of the Blattidx. 271 



the lists of Blattidffi described by earlier autliors ; neither 

 Briinner nor Kirby mention it. The type specimen from 

 the Marchal collection is in the Hope Museum, Oxford, 

 and from an examination of it I am able to place it with- 

 out a doubt in the genus Homcdodlpha. An identical 

 example from Mt. Penrissen, Sarawak [No. 28] gives the 

 habitat of this species that has for so long been unrecog- 

 nized. It may be mentioned that another of Serville's 

 types of Blattidse, viz. Blatta alcarazzas, is also in the 

 Oxford Museum. 



Genus Miroblatta, nov. 



Head covered by the pronotum, eyes closer together than the 

 antennal sockets ; antenn;e very long, third joint twice as long as 

 second. Pronotum longer tlian broad, anterior border arcuate, 

 posterior border truncate, exposing the scutellum ; markedly cucul- 

 late and narrowed anteriorly, anterior and lateral margins reflected, 

 disc with symmetrically disposed elevated ridges, Tegmina broad, 

 oval, barely reaching extremity of abdomen, overlapping consider- 

 ably, apex obtusely rounded ; corneous, densely reticulated, vena- 

 tion obscured, no anal vein or anal field, radial vein strongly 

 elevated at base, mediastinal field on under surface elevated, keeled, 

 space between mediastinal and radial veins broad, inflexed, forming 

 with mediastinal field an epipleuron, the outer margin of which is 

 the anterior margin of the tegmen, the inner margin formed by the 

 mediastinal vein. Wings broadly ovate, of same length as tegmina, 

 coriaceous, anterior part nearly twice as broad as posterior part, the 

 outer margin deeply indented at the point of division between the 

 two parts, the wing appearing bilobate ; mediastinal and radial 

 veins fused, their base elevated forming a prominent ridge, six 

 ramose branches given off to apex and outer margin, ulnar vein 

 reduced with three ramose branches only, numerous transverse 

 venules between all the veins ; posterior part of wing not folding 

 in fandike manner but merely doubling under anterior part. Supra- 

 anal lamina of male broadly transverse, slightly emarginate. Sub- 

 genital lamina of male subquadrate, styles minute. Cerci long, very 

 sharply pointed. Legs long, slender ; femora unarmed beneath ; 

 spines on posterior tibite in two rows. Posterior tarsi with meta- 

 tarsus longer than remaining joints, no spines beneath, pulvilli large, 

 the second occupying whole length of joint. Female not known, 

 probably apterous. 



The affinities of this highly remarkable genus appear to 



