INDEX. 



253 



PsychicUc, females are perpetual prisoners 

 within larva habitaciilum, 206, 216, 

 218 

 larvje subject to attacks of parasites, 



215 



probable cause of disappearance of 

 beauty in male, 214 



singular rarity of moths considering 

 abundance of cases, 214, 215 



strangely difficult to rear, 215 



want of honiogeueousness in perfect 

 state of insects of this group, 213 

 Pterochroza, the genus, wonderful pro- 

 tective resemblance of, 154 

 Ptilota of Aristotle, the, 203 



R 



Rachitic condition of locusts, cause of, 



130. 131 

 Reaumur, the earliest writer on sound 



made by Death's Head Moth, 233 

 Rearing Death's Head Moth, difficulty 



of, 232, 242 

 Riley, on hatching of Rocky Mountain 

 Locust, 100 

 on music of Locustida-, 148, 149 

 on music of Microcentrnm relinervc, 

 149 ; on its interesting habits, 150 

 Rocky Mountain Locust, arrangement of 

 air-sacs in, 85 

 appearance, 108 

 extent of period of oviposition, 96 ; 



number of egg-masses, 96 

 migratory habit, 108 

 process of hatching, 100 



S 



Sack-bearers, young, at home, 206 

 ingenuity in construction of cases, 20O, 

 208, 209 



Sacktragers, 204 



Sagides, some members of, 155 



Saltatoria, term "grasshopper " ap[)lied 



to two families of, 82 

 Saussure, de, on slender stick-like forms 

 in the genus Peringueyella, 155 

 on oceans being impassable to locusts, 



126 

 on Oedipodides, 126 

 on the geographical distribution of 

 Pamphagides, 136 

 Savigny, on the genus Eremiaphila, 28 

 Schistoccrca americana, 107 

 feregnita, perhaps originally native to 



America, 126 

 distribution, 107 

 may deposit eggs at more than one 



spot during migration, 96 

 occasionally penetrates to our shores, 



108 ; crossing the ocean, 108, 126 

 post-embryonic development, loi 

 Schizodactyhis vioiistrosus. 158 

 Scorpions, as locust-enemies, 129 

 Scudder, on the song of Katydids, 150 

 on the music of the Stenobothri, 90 

 on the Protophasmidre, 79 

 Sea, Death's Head Moth at, 238, 239, 241 

 Seas, that locusts traverse, of consider- 

 able width, 108, 125, 126 

 Sense-organs, in Acridiida;, 83, 84, 91 ; 

 sense of sight, of sound, of touch, 

 I and taste, 84, 92 



j in Locustidoe, 141, 145 

 I Sloane's, Sir Hans, history, on locusts 

 crossing the ocean, 126 

 SmerinthiuEe, 224, 225, 227, 22S 

 Song, gift of, Acridiida remarkable for, 88 

 apparatus for producing sound, 88, 8() 

 in aberrant forms of Acridiida, 88, 135, 



music characteristic of male, 90 

 I of importance to Acridiida, 88 

 Sound emitted by Death's Head Molli, 

 2^,^, 236 



