Moiiauclroptcra inuncaiis and Rliapliulerus scabrosus. 475 



on tlie Icavi'S of tlio guava [Psidluni) and the ca.ssowary-treo 

 {Cos liar in a), as well as on the t'uliage of Ajauria pijrijolia*. 



Altir having produced in the case of a few specimens 

 amputation hy anfotomy, I have succeeded in observing the 

 regeneration of the amputated limbs. A regenerated ap- 

 pendage is always distinguished from the corrc--ponding limb 

 of the same pair by its smaller dimensions and a slightly 

 different coloration. 



I'he difl'erence in dimensions clearly attains its maximum 

 when the victims of amputation are nymphs having to undergo 

 but few moults before reaching the fully developed state. A 

 very interesting point is that in a regenerated limb the tarsus 

 always f has only four joints instead of five. 



This fact uiuloubtedly affords the explanation of the 

 following mistake on the part of VVestwood : — 



The entomologist in question, having been placed in 

 possession of a specimen of Munandroptera {Diaplierodes) 

 undulata, wrote in the description that he gave of it : — " This 

 fine insect is remarkable for having only four joints in the 

 anterior tarsi, differing in this respect from all the known 

 species of the family to which it belongs'^ ('Arcana Ento- 

 mologica,' vol. i. p. 20). It is evident that Wcstwood was 

 dealing with a specimen which, when a nymph, had lost by 

 autotomy its two front limbs. 



This is further proved by the following words: — "The 

 anterior limbs are also relatively much shorter than the 

 rest." 



Neither did Ch. Coquerel, who had nevertheless studied 

 the Phasmidseof Bourbon, in this very island even, recognize 

 the true cause of this curious fact. Criticizing the opinion of 

 Westwood, he wrote : — " It was probably a case of structural 

 imperfection peculiar to tiiis individual, or perhaps Westwood 

 bad to deal with an insect which had been damaged and 

 mended by an incompetent hand" (Ann. Soc. Entom. de 

 France, 1861, p. 495). 



In a subsequent paper I propose to study the process of 

 regeneration of the limbs in the nymphs of Phasmidse, as well 

 as a number of anatomical peculiarities in these Orthoptera. 



* Ayauria 2)yrifolia is a shrub belonging- to the family Ericaceae. Its 

 highly poisonous leaves have often been the cause of cases of poisoning 

 among cattle. They do not produce any effect, however, upon the 

 Phasmids under discussion, -which eat them with avidity. 



t [The woidin the original is " souvent " (fiequently) ; in the separate 

 impiession befoie me, howeA er, the author has altered this into " toujours " 

 (ahvayt^). — Teansl.] 



a2* 



