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



go'inanica, L., and allied species such as P. ]iarentlicsis, 

 Gerst., P. madccassa, Sss., and P. Iiuviherticma, Sss., which 

 have the vena ulnaris alarum simple or bifurcate; in 

 these species however the triangular apical field is much 

 reduced, and for the present they must be regarded as 

 forms transitional between the Phyllodromiinse and Ecto- 

 biinpe. The species difficilis, Sss., and massuie, Sss., I remove 

 from the genus Phyllodromia to Thcganoptcryx ; in these 

 the supra-anal lamina is shortly produced or transverse, 

 which character in conjunction with the prominent tri- 

 angular field and simple or bifurcate vena ulnaris, renders 

 their transfer only logical. 



The genus Paclmcjitcryx., Br., I am unable to place with 

 certainty since I have seen no examples and the wing- 

 venation of the known species has never been described. 

 It is quite evident that Thyrsocera histrio, Burm., cannot 

 be referred to the genus Paclineptcryx as suggested by 

 Brunuer (Nouv. Syst. des Blatt., p. 116, 1865), it belongs 

 to the genus Hcmitliyrsoccra. I agree with do Saussure 

 in relegating Ohorisoneura to the sub-family Oxyhaloinse 

 ( = Plectopterinse). 



Genus Mallotoblatta, Sss. and Zhntn. 



McdlotoUatta obscura, n. sp. 



^ . Head, pronotum and tegmina with sparse erect hairs. Rufo- 

 castaneous. Vertex, antennte at the base, abdomen, legs and cerci 

 testaceous. Pronotum trapezoidal, sides deflexed with the lateral 

 and anterior margins hyaline, disc rnfo-castaneous with sometimes 

 an irregular central macula testaceous in colour. Mediastinal and 

 marginal fields of tegmina hyaline ; wings hyaline with the veins 

 rufo-fuscous. Tegmina with thirteen to fifteen costal veins, the 

 most distal ones branched, radial vein bifurcated, discoidal field 

 traversed by six longitudinal veins, anal vein reaching the sutural 

 margin at one-third of its length. Wings with nine to ten costal 

 veins, their extremities swollen, radial vein bifurcated, median vein 

 simple, ulnar vein simple, first axillary vein bifurcated, triangular 

 apical field prominent, projecting beyond the anterior part of the 

 wing. Anterior femora armed on the anterior margin beneath in 

 the proximal half with three long spines, in the distal half with 

 numerous short spines (type A of de Saussure); the posterior femora 

 are armed with five spines on each border beneath ; the formula of 

 the apical spines is x, {-, i ; a genicular spine is absent from the 



