144* Singularly formed Orthopterous Insects. 



entomologist since its publication, Its peculiarities are, that 

 the mandibles (of the male) are horizontal and long, with the 

 apex dentated and curved, so that the two ends meet ; and 

 the head is peculiar from having a wing-like projection on 

 each side, with the margins dentated. This insect is supposed 

 to come from Surinam ; and I would propose to call it A. 

 Herbstii, in honour of its first describer. 



Another very singular insect will be found in Stoll's work 

 on Cigales, under the name of Gryllon aquatique cornu, 

 which appears to come near the foregoing, though the form 

 of the head is totally 

 distinct. It is very long, 

 truncate, with two long 

 acute curved horns, 

 projecting forwards 

 over the lip : the latter 

 is very large, pyriform, 

 covering the mandi- 

 bles : the palpi are 

 filiform. For further 

 characters, I must refer 

 to the figure of this 

 curious insect, with the name of Henicus Stollii. {Jig. 18.) 



Before closing the remarks on orthopterous insects, I would 

 add some notes regarding the Phasmida?, which have oc- 

 curred to me since my Synopsis was published. 



In that work, I have stated (note, p. 5, 6.) that I could 

 not adopt M. Serville's arrangement of the Plerophasmata 

 into those with distinct or indistinct ocelli ; but, as I then gave 

 no reason for my rejection of it, I avail myself of this oppor- 

 tunity of doing so, as it might be satisfactory to M. Serville. 

 I will take a few examples : those with distinct ocelli, in 

 which division would come Phasma Tithonus, acanthopterum, 

 variegatum, and Hopei; whilst amongst those which have 

 none, and yet must be placed with the former, are Phasma 

 cornuceps, aramtum, and acuticorne. I may also observe that 

 several of those which would not be considered by M. Serville 

 to belong to the restricted genus Phasma also possess distinct 

 ocelli: thus Podocanthus Typhon, Xeroderus Kirbyi, Acro- 

 phylla Titan and Enceladus ; also all the species of Cteno- 

 morpha ; while, on the other hand, Acrophylla chromus and 

 Phibalosoma Lepelleterii do not possess this character. I 

 trust, therefore, that the above statement may justify my 

 offering another arrangement of the family in my Synopsis. 



I established the genus Heteronemia (p. 19.) for the recep- 

 tion of an insect of this family, peculiar for the shortness of 



