Mr. R. Shelford's Studies of the Blattidae. 285 



distinguished by its smaller size, more convex shape, the 

 outer border of the flavo-testaceous thoracic margins not 

 distinctly margined with castaneous, the genital styles 

 with a spine at their base and by the supra-anal lamina 

 ($) being less emarginate at the apex. The species varies 

 in size. New Caledonian examples being the smallest, 

 Bornean examples the largest. 



Amboina (Vienna Mus., type of soror); Ceram (British 

 Mus.) ; Navigator's Is. (Brit. Mus., type of scmicinda) ; 

 New Caledonia (Oxford Mus.) ; New Hebrides (Mel- 

 bourne Mus.) ; Tonga (Stockholm Mus.) ; Borneo 

 (Oxford Mus.) ; Formosa (British Mus.). 



43. P. communis, Tepp. (PI. VIII, figs. 25a, 25&.) 



Drymaplancta communis, Tepper, Tr. R. Soc. S. 



Australia, xvii, p. 110 (1893). 

 Mcthana a7^^^/J0fZ'?w?^, Brancsik, Jahresh. Ver. Trencsin. 

 Com. xix-xx, p. 58, PI. I, fig. 4 (1897). 

 Queensland (Oxford Mus.) ; South Australia, 

 various localities (Adelaide Mus., type oi communis ; Oxford 

 Mus., type of antipodum) ; West Australia, Swan River 

 (Oxford Mus.). 



44. P. semivitta, Walk. (PI. VIII, figs. 26a to 26/) 



Pcriplaneta semivitta, Walker, Cat. Blatt. Brit. Mus., 

 p. 143 (1868). 



Piceous or dark castaneous above, nitid, inipunctate. Thoracic 

 tergites laterally bordered with clear flavo-testaceous, outwardly 

 narrowly margined with castaneous. Head testaceous, a castaneous 

 band on vertex and a castaneous blotch on frons, antennae rufo- 

 castaneous. Maxillary palpi {$) with 1st and 2nd joint swollen. 

 Labrum sub-bilobate. Tegminal rudiments present, subtruncate 

 at apex. 1st abdominal tergite ( $ ) with a circular gland-opening 

 fringed with rufous setae.* Supra-anal lamina, ( $ ) quadrate, angles 

 acute but not produced, posterior margin slightly emarginate, lateral 

 margins entire, ( § ) cucullate, triangular, apex deeply notched. Sub- 

 genital lamina ( ^ ) trapezoidal, produced, apex widely emarginate, 

 styles placed sub-laterally. Cerci surpassing the supra-anal lamina 

 in both sexes. Coxae testaceous, blotched with castaneous. Femora 

 rufo-castaneous, anterior pair paler ; tibiae castaneous. Posterior 

 tibiae ( ^ ) very stout, flattened and expanded. 



Total length ( (J ) 24, ( $ ) 25 mm. ; pronotum 7 mm. x 9 mm. 



* This is frequently hidden under the metanotum. 



