SUBJECT INDEX 



265 



Oncopeltus fascia t us, 1 58 



Oodes gracilis, 1 59 



Optic lobe, 165, 166, 173, 175 



Optomotor responses, 178, 205 



Organic electrolytes, stimulation by, 



136-7 

 Orientation, primary, 26 

 Oryctes, 15 



Pachydiplax, 209 



longipemiis, 170, 174, 207 

 Pacinian corpuscle, 32 

 Panorpa communis, 53 

 Pediculiis, 19 



humamts corporis, 158, 159 

 Periplaneta, 37, 38, 39, 43, 44, 63, 64, 

 78, 107, 182, 206, 209, 210 



americana, 7, 16, 45, 62, 100, 130, 

 169, 182, 207 

 Phalera biicephala, 95 

 Phormia, 25, 29, 31, 32, 33, 63, 66, 116, 

 122, 123, 127, 129, 130, 131, 132, 

 135, 136, 138, 139, 143, 149, 153, 

 204, 209 



regina, 113, 115, 118, 119, 121, 127, 

 139, 140, 159, 170, 174, 207 

 Photinus pyralis, 178 

 Photoreception, 162-213 

 Pier is, 127, 130 



brassicae, 181 



rapae, 23, 118 

 Plea, 69 



Polarized light, 190-6, 213 

 Pollenia rudis, 181 

 Position receptors, 36-39 

 Posture, 26 



Pressure sense, 70, 71-74 

 Prey capture, 36-39 

 Primary neurons, 9, 10, 14 

 Prodenia eridania, 95 

 Proprioceptors, 17, 35-62 

 Proprioceptors, definition, 35 

 Psorophora confinnis, 104 

 Pterophylla camellifolia, 89 

 Pterostrichus, 106 

 Ptinus tectus, 157, 158, 159 

 Purkinje shift, 189 

 Pyrameis, 107, 126 



atalanta, 138 



Ranatra, 74 



Receptor, characteristics, 3 



primary cells, 9, 14 

 Receptor potential, 4, 28, 29, 30, 31, 

 146, 147 



Rejection thresholds, electrolytes, 

 130-1 



non-electrolytes, 131-6 



organic electrolytes, 136-7 

 Repellent, 117 

 Resolving power, 200 

 Resolving power, temporal, 206 

 Respiratory behaviour, 56, 57, 58 

 Responsiveness, 3 

 Retina, function of, 167 



pigment, 167 



structure of, 163-5 

 Retinal cells, independence of, 201, 202 

 Rhabdom, 163, 164 

 Rhagonycha, 106 

 Rhodnius, 8, 10, 11, 12 



prolixus, 10 

 Rhyzopertha dominica, 120 

 Romalea microptera, 113, 175 



Salt, stimulation by, 126, 130-1, 137 

 Salt receptor, 151-3 

 Samia cecropia, 130, 169, 181 

 Sarcophaga, 28, 31, 163, 170, 174, 183 



bullata, 163 

 Schistocerca, 64, 163, 164 



gregaria, 62, 158, 159 

 Scolopoid body, 82, 86 

 Scolopoid sensillum, 19, 21, 22 

 Scolopoid sheath, 24, 28, 55, 59, 114 

 Sense cells, categories, 14 



development of, 9, 10, 11 



number, 8, 12 

 Sense organ, definition, 2 

 Sensillum, categories, 18 



definition, 18 



structure of, 22, 24, 25 

 Sensillum basiconicum, 20, 21, 22, 113, 



114, 125 

 Sensillum coeloconicum, 22, 113 

 Sensillum placodeum, 18, 19, 113 

 Sensillum scolopophorum, 19, 20, 21, 



22 

 Sensillum trichodeum, 23, 27-35, 



36-39,66,78, 105, 115 

 Sensillum trichodeum, as sound re- 

 ceptor, 100-3 

 Sensitivity, 3 

 Sex attractant, 123^ 

 Silpha americana, 113 



noveboracensis, 113 

 Sitophilus, 158, 160 

 Skeleton, 6 

 Sound, definition, 77 



frequency discrimination, 92 



