INDEX. 83 



Page. 



Indian methods of cotton culture -. 11, 35 



names of cotton 53, 70 



Indians, agricultural habits 11, 15, 35, 48 



cotton culture 11, 35, 71 



cultivation of peppers 11 



customs at Eabinal, Guatemala 24 



formation of new varieties 15, 71 



G uatemalan , observations on boll weevils . Q6 



of Alta Vera Paz, Guatemala, characteristics 71,72 



selections of cotton 15, 16, 71 



utilization of cotton 45 



Interbreeding necessary to vigor -. 68 



Involucral appendages of plants related to cotton 33 



bracts of Paction cotton. . . : 25 



Involucre, as a protective structure 37 



bractlets 33 



external nectaries, discussion 31 



inner nectaries, discussion 31 



protection to inside nectaries 28 



protective value 37 



Involucres, closed, advantages 38, 41 



Egvptian cottons 41 



Kekchi cotton 37. 39. 40 



Kidney cotton 32 



open, advantage 42 



Eabinal cotton 37 



Sea Island cotton, attractive to keleps 26 



Upland cottons 38 



value in protecting buds 39. 41 



Irrigation, effects 45 



Ixcaco cotton in Guatemala _ 70 



Jannovitch cotton compared with Allen 17 



proliferation 50 



Jewett cotton, dimensions of buds and bracts 40 



Kekchi cotton, adaptations 73 



at northern limit of cotton culture 18 



behavior, in Texas 17 



bolls, variation in thickness of walls 56 



characteristic feature 20 



comparison with other varieties, at Lanham, Md 18 



date of planting in Guatemala 15 



developed in weevil-infested regions 4 



distinct type of Gossypium h irsutum 8 



effect of crowding on character 20 



fruiting 17 



habits of growth 15 



in the United States 17 



most promising short-season variety 22 



quality of lint 7 



rapidity of development 55 



shortness of season, explanation 11 



stems, petioles, leaves, and bolls 16 



tolerance of cold 15 



variations ... 15 



weevil resistance, high value 11 



Keleps, absent from Eastern Hemisphere 32 



adaptations, attractive 73 



definitely attracted to cotton plants 35 



effect of dense foliage - • 26 



habitat extension 36 



hairs of cotton plant, assistance in climbing 25 



imprisonment in flowers .' 29 



preference for Egyptian and Sea Island cotton and Bidens pilosa. . 26, 36, 37 



protection to cotton 8. 34. 35 



unknown to European residents in Guatemala 71 



