168 



Mr. R. Sbelford on new 



rated by three [latipennis] ov two (palh'corm's) pores of 

 relatively large size and semilunar in shape ; the tongue of 

 chitin projecting into the crescentic pores is tuberculate in 

 palh'cornis, but simple in latipennis. It is difficult even to 

 guess at the function of these pores. Since they occnr in 

 both sexes, it is evident that they are not secondary sexual 

 structures ; but it is just possible that they are connected 

 with prothoracic repugnatorial glands, though such have not 

 yet been shown to occur in the Blattidte. The pronotal 

 integument appears to be double in the region of these pores, 

 and the pores appear to lead into a cavity existing between 

 the upper and lower layers, and not to perforate the entire 

 integument, for a bristle passed through one of them does not 

 emerge on the ventral side of the pronotum. Without 

 dissection it is not possible to be certain as to the relation of 

 the parts, and the pores may be merely the entrances to 

 invaginated cavities in the thickness of the pronotal chitin. 



KeT/ to the Species. 

 Males. 



1. Pronotum aud abdomen with erect pubes- 

 cence. [E. Africa.) 

 2. ProEotum with large lateral pores .... latipennis, Kirby. (Bi'it. 

 2'. Pronotum without large lateral pores. . macra, Stal. (S. Africa.) 

 1'. Pronotum and abdomen not pubescent. [boon.) 

 2. Posterior margin of pronotum dentate . scabricollis, Gerst. (Ga- 

 2'. Posterior margin of pronotum not den- 

 tate. 

 3. Tegmina scarcely exceeding the apex 



of the abdomen yibhicoUis, Stal. (Natal.) 



3'. Tegmina considerably exceeding the 

 apex of the abdomen. 

 4. Small species (total length about [Africa.) 



38 mm.) jwdwiformis, ^Yalk, (S. 



4'. Larger species. 



5. Tegmina pale testaceous, casta-. [E. Africa, Soraaliland.) 



neous at base eapucina, Ger.st. (Germ. 



5', Tegmina uniform castaneous . . tnarshaUi, sp. n. (Rho- 



[desia.) 

 Females. 



1. Body slender, elongate : species of small 

 size. 

 2. Pronotum much longer than broad .... 

 2'. Pronotum scarcely longer than broad 

 or as broad as long. 



3. Abdominal segments scabrous 



3'. Abdominal segments smooth 



1'. Body less slender, abdomen sometimes 

 ampliated : species of larger size. 

 2. Pronotum distinctly broader than Ion:?. 



[Africa.) 

 poduriformis, Walk. (S. 



[(Somaliland.) 

 graniger, Sauss. & Zehnt. 

 sp. n. (Nyasa- 



' [land.) 



