INDEX 



439 



Crickets — Continued. 



oaroUensis), 423; Short-legged 

 camel (CeuthopMlus brevipes), 

 423; Small brown (Anaxipha 

 exigua), 421; Small ground (Ne- 

 mohius exiguus), 423; Snowy 

 shrub (Oecanthus niveus), 428; 

 Sociable field (Gryllus ahhrevia- 

 tus), 326, 387, 423; Spotted 

 camel (Ceuthophilus maculatus), 

 424; Spotted ground (Nemolius 

 maculatus), 425; Striped ground 

 (Nemobius fasciatus), 302, 421; 

 Striped meadow (Oecanthus fas- 

 ciatus), 22, 23, 379-386, 429; 

 Swamp ground (Nemobius can- 

 us), 421; Two-spotted shrub 

 (Xahea bipunctata), 429; Uh- 

 ler'^ camel (Ceuthophilus uhleri), 

 428. 



Crows, appetite for poison ivy 

 drupes, 29; appetite for toads, 

 259; iSarrows' observations on, 

 314. 



Crysis wasp, 214. 



Cuban ground cricket (Nemobius 

 cubensis), 423. 



Curved lance katydid (Scudderia 

 curvicauda), 427. 



Dace, black-nosed (Notropis me- 

 galops), 284, 285. 



Daddy-long-legs, 289, 294, 296. 



Daisy, its position among plants, 

 321. 



Dale, definition of, 433. 



Damsel flies, 280. 



Danaine butterfly, 126. 



Darning needles, see Dragon-flies. 



Darwin, on cross fertilization, 31- 

 33; on insects " shamming 

 dead, " 82 ; on instinct in animals, 

 11-13; on mimicry, 118; on 

 moths, 62-64 ; on • protective 

 resemblance, 67, 68; on sexual 

 selection, 22; on orange-tip but- 

 terfly, 85, 86; struggle for exist- 

 ence, 6-9 ; on sundew as insectiv- 

 orous plant, 296; on utility and 

 natural selection, 19; on varia- 

 tions, 13, 18. 



Datana moth, 89-92, 193. 



Davenport, quoted on Johannsen's 

 " frequency polygon," 18, 19. 



Dawson's locust (Melanoplus daw- 

 soni), 422. 



Death feigning, 80, '82, 180. 



Defensive coloring, see Colors; see 

 Protective resemblance. 



Defensive organs, of Cresphontes 

 caterpillar, 150-159; of Puss 

 moth caterpillar, 153, 154; of lo 

 larva, 162, 163; in slugs, 289; in 

 toads, 259. 



Delicate grasshopper (Orohelimum 

 delicatum), 200, 428. 



Descent of animals, Galloway's dia- 

 gram of, 6. 



Desert, definition of, 432. 



Design, hypothesis of, 92. 



DeVries, H., on formation of new 

 species, 13-18. 



Dew, 375, 376. 



Dickerson, quotation from " Frog 

 Book, ' ' 258 ; on tadpoles, 75. 



Digger wasp (Sphecius spheciosus), 

 216-218. 



Diptera, see Fly. 



Dispersal of animals and plants, 

 317, 318. 



Dispersion of seeds, general, 28-30, 

 286, 287; of blueberry, 299; of 

 cat-tails, -287 ; of witch-hazel, 49. 



Ditch, definition of, 430. 



Dog-day harvest-fly, or Cicada (Ci- 

 cada tibicen), 59, 215-218, 289. 



Domestication of animals, 8, 9. 



Dove, mourning, 243, 245. 



Dragon flies, habits, 278-283; 

 Aesohna oonstrieta, 281; Anax 

 Junius, 278 - 281, 283; Argia, 

 279 ; Lestes, 280 ; Libellula pul- 

 chella, 280; Sympetrum vicinum, 

 278, 279, 282. 



Drone fly (Eristalis tenax), court- 

 ship of, 215; mimicry of honey 

 bee, 132. 



Drupes, of poison ivy, 29; of sassa- 

 fras, 297, 298. 



Dunes, definition of, 482; life in, 

 295-300. 



Earwig, forceped (Forficula aaw- 

 leata), 425; Small (LaMa minor), 

 425. 



Ecology, interpretations of, 315-418, 



Egg-laying sites, habitat of various 

 drthoptera based on, 419-429. 



Egg-sac, of spider, 277. 



Eggs, of Anthocharis genutia, '84; 

 Carolina locust, 344; of Chewink, 

 264; of Cone-head grasshopper, 

 338; of Datana, 92; of Dragon 

 flies, 278, 280; of Field sparrow. 



