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that I did not think it existed in Mauritius, and comparing it 

 a few days since with a large number of specimens from all 

 parts of the world in the Museum, I could find nothing ap- 

 proaching it in colour and markings. 



No. 11. Libellula. This is the only Dragon-fly I saw on 

 the Island, and as it is an insect of such strong and rapid 

 flight, it may have been blown from the main land, where it is 

 very common. 



No. 12. Orthoptera. This insect is very numerous on 

 Eound Island, but I am unable to say if it is a native of 

 Mauritius. 



No 13. This insect, a Gryllus, somewhat resembles the 

 Truxale nasus of Dumeril, but it has the tail like appendages 

 of the Locust, and much finer anteunoe. 



No. 14i. A Grillo-falpa or Mole-cricket, a native of almost 



every country in the world, and I think Mr. Gr. Clark makes a 



mistake when he says it was introduced here from Australia. 



No. 15. Is a Mauritian cricket and though injured, enough 



is left for comparison. 



No. 16 & 17. J.MOjmcZes of Dumeril. MonandropteraofH, 

 M. Lucas. These are curious specimens of Phasma. No. 16 

 was darker in colour when alive, but No. 17 that I found in 

 the same locality were bright green. This led me at first to 

 take them for distinct species, but on careful comparison I 

 have concluded that they are one. I presume the diversity of 

 colour may be owing to difference of age or sex, or probably 

 from the peculiar food it might have parteken of in the larva 

 state which is well known will aff'ect other insects, I passed 

 sometime at the Museum comparing these Phasmas with 27 

 species from various countries, and I find they all difier in 

 many respects. 



I have added a native of Mauritius No. 18 which comes the 

 nearest to them, the Phasma Geant of Dumeril, I believe. 

 There are however great differences. Tou will observe that 

 in the latter species the tubercles on the corslet are very 

 prominent, in 5 pairs, and there are two pairs on the Thorax^ 

 In those from Hound Island, the tubercles are very numerous 

 and almost microscopically small, extending evor nearly the 



