402 Annals of the South African Museum. 



(Restio sp.) growing in this sandy spot. Then the deep voice of Bulla 

 immaculata would be heard above the din, and answered from a 

 distance by another competitor. It was a challenge, doubtless, for 

 several males came nearer to the tent, and their notes were indeed 

 weird. It may be, however, that the lure was the whiteness of the 

 tent, for in the morning I did not succeed in capturing a single female, 

 and the males often fly to the lights or camp fires. They are so well 

 adapted by colour to that of their surroundings that they are in day- 

 time very difficult of detection. The females are still better protected 

 at night or dusk by the brilliancy of their white markings, which 

 consist of raised enamelled lines or patches of silvery white. That 

 the reflections of crepuscular light 011 these white surfaces break 

 altogether the contour of the animal, even when in motion, was very 

 well instanced by two females of Pneumora which I kept in captivity. 

 The Pneumorids seem restricted to South Africa. I have not seen 

 any examples from the Transvaal, either Eastern or Western, nor 

 from Southern Ehodesia or N'Gamiland. This does not mean that 

 they have no representatives there, because one, somewhat abnormal, 

 form is recorded, and figured from the Zambesi, by Westwood. This 

 genus, and species, Physopliorina livingstoni, is not represented in the 

 Museum Collection, and I am not aquainted with Prostalia (Potn- 

 pliolix) granulata Stal ; but with the exception of one species of Bulla, 

 all the described species are represented in our Cabinet, and there are 

 several which, it is believed, are described here for the first time. 



GEN. BULLA, Linn. 

 (Syst. Nat. (ed. x), 1758, i, p. 427.) 



Linnaeus in 1758 founded the genus for one species, B. unicolor; 

 another, B. carinata, is ascribed to him by Kirby in his ' Synonymic 

 Catalogue of Orthoptera.' It is described in two lines, and the habitat 

 given is India. Thuiiberg, in 1810, described and figured seven. His 

 figures are not trustworthy and his descriptions are not very clear. 

 He unduly multiplied the species. Stal, in his ' Recensio Orthoptero- 

 rum,' 1, 1873, described anew Tlmnberg's species, which I understand 

 are in the Museum of the Upsala University, and made possible the 

 identification. He sunk three species in synonomy, and added one, 

 B. loiigicornis, and in 1870 Walker described a larval ? form, B. 

 membraciodes, which is probably the same kind. 



I am satisfied that our examples of B. unicolor, B. immaculata, B. 

 discolor, are correctly identified ; B. ocellata remains a little doubtful ; 

 B. papillosa I have not yet met with ; B. serrata I take to be the $ of 



