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 examjjies being the smallest, 

 Boruean 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. 25«, 25?).) 



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



Australia, xvii, p. 110 (1893). 

 Mcthana anfi2)odum, 'Brancsik, Jahresh. Ver. Trencsin. 

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

 Queensland (Oxford Mus.) ; South Australia, 

 various localities (Adelaide Mus., type of 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. Bi-it. Mus., 

 p. 143 (1868). 



Piceous or dark castaneous above, nitid, impunctate. 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 ri:fous setae.* Supra-anal lamina, ( ^ ) quadrate, angles 

 acute but not produced, posterior margin slightly emarginate, lateral 

 margins entire, ( $ ) cucuUate, 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 ( c? ) 24, ( $ ) 25 mm. ; pronotum 7 mm. x 9 mm. 



* This is frequently hidden under the metanotum. 



