INSECTA ORTHOPTERA. 161 



present in those which feed upon hard vegetable substances. 

 This is particularly remarkable in the Orthoptera, among 

 which, for instance, the Mantis possesses the so-called 

 " gizzard," whilst the Phasmce are without it ; and in the 

 same way the Locusts are provided with it, and the Acridii 

 not. It may also be readily observed on dissection, that 

 in those insects which are furnished with the so-called 

 " gizzard," the contents of the oesophagus are already liquid, 

 so that the " gizzard" has nothing more to masticate. The 

 author proves, from his observations, that in comparison 

 with the oesophagus the muscular power of this part is 

 very inconsiderable, and he consequently denies that it has 

 any comminuting power. A great part of the present 

 researches relates to the functions of the various parts of the 

 intestinal canal. The ventricular appendages are proved to 

 be secreting organs. A remarkable phenomenon was ex- 

 hibited in Loc. viridissima, in the circumstance, that when it 

 was fed upon insects, the alimentary canal sometimes, and 

 in one instance even the " tracheae," assumed a red colour. 

 The organ of stridulation also of some " Locusts" has been 

 carefully described by the author. 



Of Charpentier's Orthoptera descripta et depicta, three 

 successive Parts (7-9) have appeared, the contents of which 

 will be more particularly stated below. 



The conclusion of De Haan's work, referred to in the 

 last Report, ' Bijdragen tot de Kenuis der Orthoptera, 3 is 

 contained in the 10th Part of the Verhandl. over de 

 natuurlijke Gescheid. der Nederlandsche overzeesche Bezit- 

 tingen, Zoologie. Although this Part did not appear till 

 1844, still it appears desirable now to complete the Report 

 with it. 



FORFICULAIULE. The new species of this family, which have been made 

 known by De Haaii, (1. c.) are : Apacliya charactered, from Borneo, Sumatra ; 

 Pygidicrana pallidipennis, from Borneo ; Psalidophorafwscipennis, and albo- 

 marginata, from Sumatra ; Echinosoma sumatrana, from Padang, living gre- 

 gariously in rotten wood ; Forficula longijtes, forcipata, In-achy nota, from 

 Sumatra ; insignis, Hag., and tenella, Hag., from Java. 



11 



