Nisitrus malaya 
Noble Bush Katydid 
Northern Bush Katydid 
Northern Grass Pyrgomorph 
Nosed Grasshopper 
Oblong-winged Katydid 
Obscure Bird Grasshopper 
Ocnerodes fallaciosus 
Ocneropsis bethlehemita 
Oedaleus decorus 
Oedipoda caerulescens 
Olcinia dentata 
Olive-green Coastal Katydid 
Olive-green Swamp Grasshopper 
Ommatolampis quadrimaculata 
Onomarchus leuconotus 
Opaon varicolor 
Ophiotettix filiforma 
Orchelimum silvaticum 
Ornebius novarae 
Orophus tessellatus 
Orthacris ceylonica 
Oxya chinensis 
Oxya hyla