392 



INDEX OF TEXT 



Nesocordulia 290 



Neaogonia 294 



Nescleste? 278, 290 



Nesoxenia 299 



Neurobasis 255, 297 



Neurocordulia 269 



Neurolestes 277 



Neuroptera 1 



Neurothemis 254, 270, 299; N. oligo- 

 neura 254; N. stigmatizans 254 



Nodate gill 195 



Node 191, 195 



Nodus 53 



Nososticta 192, 195 



Notation, for gizzard 108; for wing- 

 venation 39, 40-^3 



Nussbaum, on embryology of mid-gut 

 236 



Nymph 67 



Oblique vein 66 



Obliquity of thorax 22 



Ocellar nerves 126, 127 



Ocelli 12, 70. 74, 137 



Occiput 12, 33 



Odonata, census of 300; denned 3 



Oedogonium 332 



Oeningen fossils 316-7 



Oenocytes 164 



Oesophageal lobes 127 ; ring 127 ; valve 

 109 



Oesophagus 14, 15, 101, 103 



Oligocene fossils 314 



Ommatidium 141, 145 



Ontogeny of rectal gills 186 



Onychogomphus 297 



Oogonia 219 



Ophiogomphus 288 



Oplonaeschna 315 



Optic bundle 130; ganglion 127; 

 nerve 126, 130 



Optical phenomena 150 



Opticon 129 



Orbits 12 



Oriental Region, fauna of, ectogenic 

 298; entogenic 290; palaeogenic 

 283 



Orientation 156 



Orogomphus 28, 283 



Orthemis 296 



Orthetrum 131, 171, 185, 250, 282, 299, 

 344; 0. caledonicum 250; 0. cancel- 

 latum, 345, 351 ; 0. coerulescens 344, 

 351 ; O. pruinosum 298 : O. sabina 

 250; 0. villosovittatum 250, 335 



Orthoptera 1, 118, 233, 304 



Osburn, on larvae in brackish water 

 332 



Osmotic membrane 190 



Osteoles or ostia-organs 160 



Ostia 159 

 Otaria 155 



Oustalet, on tracheal system 177 

 Ovaries 219 

 Oviduct 221 

 Oviposition 225 

 Ovipositor 32. 221 

 Oxygastra 267,288,342,351; O.curtisi 

 342, 351 



Pads, basal 184, 188, 190; of small 



intestine 114; rectal 115, 188 

 Palaearctic Region, fauna of, ectogenic 



296; entogenic 288; palaeogenic 



282 



fPalaeodic f yoptera 304 

 Palaeogenic fauna 282 

 Palaeozoic record 302 

 Palpopleurini defined 270; genera 



of table opp. 282 

 Palps, labial 81 ; maxillary 17 

 Paltothemis 296 

 Pantala 253, 269, 282; P. flavescens 



253, 333 



Paper triangles 354 

 Papilla, supra-vortical 1 85 

 Papillate gills 181, 186 

 Papillo-foliate gills 183 

 Papuan sub-region 292-3 

 tPARALOGIDAE 305 

 \Paralogu-x aeschnoides 305 

 Paramoecium 358 

 Paraneuroptera 1, 2 

 Parasites 330 



Parietal layer, of mesoderm 234 

 Patterns, colour- 246 

 Pedicel, of antenna 15, 74, 151 ; of 



egg 69, 230 

 Penis 217; sheath 217 

 Pentathemis 293 

 Pericardial cells 119 

 Periopticon 129 

 Periplasm 229 

 Perithemis 254 



Peritrophic membrane 111, 112 

 Perkins, on Hawaiian fauna 294 

 Perlaria, affinities with Odonata 5, 6 

 Perlidae 1 



Permian fossils 50, 306 

 Petalia 283 



Petaliini defined 263 ; genera of 283 

 Petalura 35, 49, 51, 96, 97, 98, 131, 



132, 147, 169, 251, 282, 292, 305, 311, 



324,325, 335; P. gigantea 96, 147; 



P. ingentissima 325; P. pulcherrima 



248 

 PETALURINAE defined 262; genera 



of 282 



Petiole, of wing 64 

 Phagocyte organs 159, 160 



