BLATTARI^. 189 



44. Periplaneta polita. 



Mas. Atra, lata, elliplica, convexa ; caput parvum, prothoracem vix 

 superans ; antennce riifce, basi nigra: ; prathorax ulrinque sulco tenui 

 areualo ; metathnracis anguli posiici subproducli ; abdomen sub- 

 tilissime punclatum; segmenta abdominis posteriora angul.is poslicis 

 productis ; lamina supra-analis divisa, subquadrata ; pedes robustly 

 tarsis apice rufis; alee anlicee rninimcB, 



Mas. Deep black, broad, elliptical, convex, smooth, shining. Head 

 small, h.trdly extending beyond the prothoiax. Eyes piceous, wide apart. 

 Antennae red, slender, black towards ihe base. Prothorax with a very 

 slender curved farrow on each side of the disk; fore border hardly trun- 

 cated ; sides rounded ; hind border straiglit. Mesoihorax, melathorax and 

 abdomen above very finely punctured. Hhid angles of the metathorax 

 slightly elongated. Hind angles of the abdominal segments from the first 

 to the last successively move elongated and acute. Supra-anal lamina 

 forming two subquadraie lobes; styles long, stout. Cerci long, lanceolate, 

 flat, rather slender. Legs thick, moderately long; femora with long stout 

 spines; tarsi red towards the tips; arolia rather large. Fore wings rudi' 

 raeutary, corneous, punctured. Length of the body 9 lines. 



a. Formosa. Presented by Dr. CoUingwood, 



45. Periplaneta glabra. 



Mas. Atra, ovata, glabra ; caput prothoracem perpaullo superans ; meta- 

 thoracis anguli posiici perparum producti ; abdominis segmenta 

 nngulia posticis elongalis acutis ; lamince supra-analis lobi telrngoni ; 

 cerci plani, fusiformes ; pedes breves, robusti, aroliis magnis ; alee 

 anlicee cornea, minimce, trigonce, 



Male. Deep black, oval, convex, smooth, shining. Head extending 

 very little beyond the prothorax. Eyes darkly livid, wide apart. Antennas 

 black. Prothorax a little longer than half its breadth ; fore border slightly 

 truncated; sides rounded; hiud border straight. Mesoihorax with tri- 

 angular rudimentary corneous fore winjjs. Hind angles of the metathorax 

 very slightly elongated. Hind angles of the abdominal segments from the 

 first to the seventh successively more elongated and acute; supra-anal 

 lamina bilobed, the lobes tetragonal; styles long, slender. Cerci flat, 

 fusiform. Legs short, robust; femora with long stout spines; arolia large. 

 Length of the body 9 lines. 



The structure of the supra-anal lamina distinguishes it from P. polila, 



a. Australia. 



46. Periplaneta bimaculata. 



Foem. Nigra, fusiformis, subtilissime punctata ; caput prothoracem sat 

 superans, margine antico fnlvo ; antenna rufoe, basi nigrce ; prothorax 

 fnaculis duabus lateralibus luteis elongatis ; metathoracis anguli 

 postici vix producti ; lamina supra-analis inlegra, carinata, com- 

 prgssa; pedes picei, robusti, tarsis nonnunquam rujis ; alee anticm 

 minimcE, carinata. 



