102 



GEOGRAPHICAL DISTRIBUTION 



Opiptacris 10 

 Syntomacris 14 

 Slenacris 14, 16 

 Glaphyracris 14 

 Chariacris 14 

 Pcepedetes 15 

 Pedies 15 

 Tinaria 4 

 Oxyphyma 14 ? 

 Cuculligera 2 

 Heteracris 2—5, 8 — 12 

 Leptacris 9 

 Caloptenus 1 — 16 

 Ommatolampis 14, 15 

 Platacantbus 5, 11 

 Platyphyma 2, 15 

 Podisma 1, 2, 4—6, 13—16 

 Batrachopus 13 

 Pegasidion 15 

 Polysarcus 16 



Fam. 20. CEmpoDiDiE. 

 Pachytylus 1 — 12, 14 

 (Edipoda 1—16 

 Tomonotus 15, 16 

 Urnisa 11 

 Stauronotus 2, 3, 7 

 Hippopedon 15 

 Stenobotbrus 1—11, 13 — 16 

 Epacromia 1 — 6, 8 — 12 

 Stetbeophyma 1, 2, 16 

 Parapleurus 1 

 Paracinema 2, 5 



Gomphocerus 1, 2, 7, 8, 10, 14, 16 

 Chrysochraon 1,2, 14 

 Phlocerus 6 



The Dermaptera-fauna may be noticed with reference to tbe com- 

 paratively recent natural cbanges on tbe surface of tbe earib. Wben tbe 

 latter part of the glacial period commenced and the arctic climate began 

 to retreat from tbe equator towards the poles, the insect-life in tbe tropical 

 regions was gradually developed or widened, and sent forth branches to the 

 north and to the south in the track of vegetation. In proportion as tbe 

 present inter-tropical Insect-fauna is more known it exhibits a greater 

 abundance of forms that correspond to those of temperate countries, and 

 this number will probably be much increased when the insects of the 

 mountains of low latitudes are more fully observed. The hot countries, on 

 the contrary, have many groups that are peculiarly their own and have no 

 representatives elsewhere, and the fauna of each higher latitude may be 

 considered as a branch or colony from the fauna of the lower latitude, 

 whence it migrated according as conditions of temperature and arrange- 

 ments of l$nd and sea and vegetable distribution allowed its advance. The 



Tragocephala 16 

 Oxycoryphus 2, 3, 6, 15 

 Hvalopteryx 14, 12? 

 Sphenarium 15 

 Phloeoba 10 

 Sinipta 14 

 Pnorisa 5 

 Hemiacris 5 

 Morphacris 5 

 Ceracris 9 

 Mastax8, 10, 14 

 Chrotogonus 3, 5, 9, 1 1 

 Thrinchus 2, 3, 6, 13? 

 Glyphanus 2 

 Leprus 15 

 Dactylotum 15 

 Trachypetra 5, 9 

 Phyllochoreia 9, 10 

 Hippiscus 15 

 Ommexecba 14 

 Pneumora 5 

 Cystoccelia 5 

 Graea 13 

 Bufonacris 14 



Fam. 21. TEiriGiDiK. 

 Tettix 1—11, 13—16 

 Scelymena 8 — 10 

 Amorphopus 14 

 Cladonotus 4, 5, 8—10 

 Tripetalocera 10 

 Paulinia 14 

 Choriphyllum 15 

 Hymenotes 4, 10 

 Ophiotettix 10 



