250 Mr. R. Shelford’s Studies of the Blattidx. 
margined with yellow all round its border leaving a trefoil-shaped 
black centre. 
Th. spectabilis, Burm. (NEPAL, CEYLON, MALACCA.) 
(Type in Berlin Museum.) 
Two joints beyond the antennal tuft white. Pronotum with pos- 
terior margin and with two antero-lateral spots yellow, the black of 
the disc forming a cruciform figure. Ante-penultimate segment of 
abdomen beneath yellow. 
Th. speciosa, Wik. (EK. INDIAN ARCHIPELAGO.) (Type in 
Oxford Museum.) (Plate XIV, fig. 5.) 
u. The Oriental species exclusive of spectabilis, hitherto 
included in the genus Thyrsocera, belong to two different 
genera, viz. one in which the vena ulnaris alarum is simple 
or ramoseand an apical triangle present, Hemithyrsocera,Sss., 
another in which the vena ulnaris alarum is ramose and 
an apical triangle absent : for the latter species a new genus 
is created and may be diagnosed as follows :— 
PSEUDOTHYRSOCERA, gen, nov. 
Similar to Psewdomops, Serv., but with the anterior ulnar vein of 
the tegmina bifurcated instead of simple, and the pronotum truncate 
behind instead of produced. Antenne more or less incrassated and 
plumose in both sexes, whereas in Pseudomops the antenne are not 
always plumose in the male. Rami of the posterior ulnar vein of the 
tegmina angulate ; ulnar vein of the wings ramose, but sending no 
branches towards the dividing vein. 
The species to be included in this genus are :— 
1. P. scutigera, W1k. 
Pseudomops scutigera, Walker. Cat. Blatt. B. M. p. 212 
(1868). (SARAWAK, BoRNEO.) 
2. P. pica, Walker. 
Pseudomops pica, Walker. Cat. Blatt. B. M. p. 218 
(1868). (SuMATRA and SINGAPORE.) 
3. P. canthophila, Walker. 
Blatta xanthophila, Walker. Cat. Blatt. B. M. p. 230 
(1868). (MENADO, CELEBEs.) 
The types of these are in the Oxford Museum. 
