150 Mr. W. F. Kivby on the 



Siugeta marmoreus. 



A2)M<Tus? marmoreus, Butl. Ent. Month. Mag. ii. p. 169 (1866). 

 Mans marmoreus, Hew. 111. D. Lep., Supp. p. 11 (1869). 



Hah. White Nile. 



The only specimen I have seen is the type in the British 

 Museum. It appears distinct from the preceding. 



I have not included in the present paper several species 

 which have been either described or placed in the genus 

 lolaus by various authors, as they do not seem to me to be 

 properly referable to any genera noted here, i. e. : — 



Myrina pcdlene, Wallengr., placed in loJaiis by Mr. Trimen. 



lolaus argentartiis, Butler, from Madagascar. 



lolaus inaggue^ Oberthlir, from Abyssinia. 



lolaus tojoraca^ Walker, from Arabia. 



XVTI. — On the Phasmidaj of Madagascar^ with the Descrip- 

 tion of a new Genus and Species in the Collection of the 

 British Museum. By W. F. Kirby, Assistant in Zoolo- 

 gical Department, British Museum (Natural History). 



We are constantly being reminded of tlie incompleteness of 

 our knowledge as regards entomology, and sometimes even in 

 the case of the largest and most conspicuous insects of 

 countries which have frequently been visited by collectors ; 

 but I was hardly prepared to find that practically nothing is 

 yet known of the Phasmida3 of Madagascar. 



The four following species, all belonging to genera peculiar 

 to the island, are literally all which have been described as 

 inhabiting it : — 



(1) AcroiojJterafallax, Coq. Ann. Soc. Ent. France, (4) i. 



p. 495 (1861). Port Leven. 



(2) Parectatosoma hystrix, Wood-Mason, Journ. As. Soc. 



Beng. xlviii. p. 117 (1879). Fianarantsoa, Antana- 

 narivo. 



(3) P. echinus, Wood-Mason, I. c. p. 118 (1879). Fiana- 

 rantsoa. 



(4) Orohia niqrolineata, Stal, Svensk. Handl. Bihang, ii. 



(17) p. 17 (1875). Madagascar. 



