Colleetion of African Blattidse. 291 



Derocalymma porcelUo. 



Derocalymma porcellio, Gerst, Arch. f. Nat. xxxv. p. 207 (1869) ; Von 

 der Deckeu's Reiseu, ii. (2) p. 7, pi. i. tigs. 3, 3 a (1873). 



1, Zomba ; 2, Fort Johnston, Njasaland (Rendall) ; Lake 

 Jipe, Uru {(Jerstaecher). 



J am not sure that Gerstaecker has correctly identified the 

 I'emale of this species. I should not be surprised to tind that 

 it was a broad oval insect allied to D. intermedia. 



Derocalymma linearis (?). 

 Perisphceria limaris, Walk. Cat. Blatt. p. 176. u. 25 (1868). 



1, Pretoria {Distant). 



An immature specimen, apparently belonging to this species. 



Derocalymma punctata. 



Derocalymma punctata, Sauss. Rev. Suisse Zool. iii. p. 29 (1895) ; 

 Sauss. & Zehntn. Grandid. Madng., Orth. p. 131 (1890). 



2, Pretoria (Distant). 



The only locality given by Saussure is South Africa. 



Derocalymma bipapilla, sp. n. 



Long. Corp. 20-22 niillim. ; lat. pron. 13 millim. 



Female. — Black; head small, punctured; eyes moderately 

 approximating ; pronotum broad, the lateral laraellaj longi- 

 tudinally convex both above and below ; a broad gutter on 

 the inner side of the rim above, extending to the front margin, 

 where the approximating ends are separated by a sliort longi- 

 tudinal carina. The pronotum is thickly punctured, and 

 about the middle of the gutter is a large raised tubercle on 

 each side. The back of the pronotum is raised into a 

 crescent directed forwards ; the front of this is less thickly 

 punctured, but the enclosed segment of a circle behind very 

 thickly. Here, and on the remaining segments of the thorax 

 and abdomen, we find interrupted traces of a central carina. 

 The sides of the meso- and metanotum are flattened and re- 

 curved, and the segments of the abdomen are subdentate on 

 the lateral edges. The abdomen is thickly cribrate-punctate, 

 and there is a row of large granules on each side of the meta- 

 notum and of all the segments of the abdomen except the last, 

 before the extremity. Cerci black ; terminal plate obtusely 

 angulated. 



(5, Blantyre {Elson). 



19* 



