448 



INDEX 



Ridge, definitiou of, 433. 



Eiley, on ScMzura unicornis, 114; 

 on green meadow grasshopper 

 eggs, 204. 



Eill, definition of, 430. 



Eiver, definition of, 430. 



Eobber-fly (Dasyllis sacrata), exam- 

 ple of mimicry, 20, 127-129, 131, 

 178, 324. 



Eobertson, on the Bergamot, 54 ; 

 Cardinal flower, 58 ; on migration 

 of Ruby-throat humming-bird, 43. 



Eobin, behavior, 225, 236, 245, 308, 

 310; nest, 262. 



Eobust cone-head grasshopper (Con- 

 ocephalus robust us), 340, 341, 427. 



Eock, definition of, 433. 



Eolled-leaf moth, protective resem- 

 blance, 97, 98 ; and jumping 

 spider, 193, 194. 



Eomanes, on adaptation, 27 ; galls, 

 53, 54; insects shamming dead, 

 82; instinct, 167; mimicry, 133; 

 protective resemblance, 92 ; natu- 

 ral selection, 15, 24; reason, 167; 

 definition of isolation, 27, 28; of 

 species, 4, 5. 



Eose-chafer, or rose bug (Macro- 

 dacii/Ius subspinosus), 219, 220. 



Eough locust (Ilippiscus rugosus), 

 422. 



Eound winged katydid (Amblycory- 

 pha rotundifoUa), 428. 



Euby-throated humming-bird (Tro- 

 chilvs colubvs), bill and tongue 

 of, 28, 41-46; and " bird flow- 

 ers," 42-48, 56-58; migration, 21, 

 33. 



Eusty locust ( Schistocerca ruhigi- 

 nosa), 368. 



Saddle back larva (Sibine stimulae), 



138, 142-144. 

 Sagittaria, 277, 280, 296. 

 St. John 's wort, 299. 

 Sand bar, definition of, 432. 

 Sand cherrA' (Prunus pumiln), 299. 

 Sand drift, definition of, 433. 

 Sand grouse locust (Tetrix areno- 



sus), 421. 

 Sand locust (Ageneotettix areno- 



sus), 362, 423. 

 Sand-loving field cricket (Gryllus 



arenacrus), 424. 

 Sand-loving fly (Stichopogon tri- 



fasciata), 327. 

 Sandy shore, definition, 431. 



Sassafras in dunes, 297, 298 ; drupes 

 of, 297, 298; and rose-chafer, 

 219. 



Saussure's lesser cricket (Miogryl- 

 lus saussurei), 423. 



Savannah, definition of, 431. 



Saw-fly, 74, 81. 



Scent organs of Cresphontes cater- 

 pillar, 150-152; of swallow-tails, 

 149. 



Scent scales of Monarch butterfly, 

 122. 



Schizura caterpillar (ScMzura ipo- 

 meae), 110-114. 



Schwarz on the common crow, 314. 



Scudder on stridulation of mole 

 cricket, 376. 



Scudder 's ground cricket (Nemo- 

 biu.i caroliensis), 423. 



Scudder 's Paroxya locust (Paroxya 

 sciulderi), 420. 



Scudder 's short winged locust (Me- 

 lanoplus scudderi), 422. 



Sea, definition of, 430. 



Seashore, rocky, 431. 



Seasonal procession of birds, flow- 

 ers, and insects, 56-59. 



Seeds, blueberry, 299 ; dispersion, 

 28-30, 49, 286, 287, 317, 318; 

 hooked, of burdock, 28 ; sassa- 

 fras, 297, 298; winged, 28. 



Selection, natural, see Natural se- 

 lection. 



Sense organs in insects, 168, 169; of 

 Cresphontes caterpillar, 150-153; 

 of thread-legged bug, 194. 



Sexual selection (secondary), in 

 striped meadow cricket, 22, 23, 

 383, 384; in orange-tip butter- 

 fly, 85 ; red-bellied minnow, 284. 



' ' Shamming dead ' ' of insects, 80, 

 82, 180. 



Short-horned locust (Syrbula admir- 

 obilis), 362; Tryxalis brevicor- 

 nis. 400-405, 420. 



Short-legged camel cricket (Ceu- 

 thophihts brevipes), 423. 



Short-winged brown locust (Steno- 

 bolhrns curtipennis), 326, 327, 

 330, 370-372, 420. 



Short-wing grasshopper (Xiphidium 

 brcvipcnne), 326, 328, 427. 



Short-winged green locust (Dichro- 

 morpha viridus), 295, 297, 392- 

 394, 420. 



Short-winged grouse locust (Tetti- 

 gidea parvipennis), 420. 



