34 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



Page. 

 On a new genus in the Lepidopterous Family Tineidae with remarks on 



the fertilization of Yucca 150 



Generic characters of Pronuba, 150 Description of Pronuba yuccasella, 

 151 Plants requiring the aid of insects for fertilization, 152 Fertili- 

 zation of Orchids, 152 Fructification of Yucca, 153 Yuccas must rely 

 on insects for fertilization, 153 Insects frequenting Yuccas, 154 Di- 

 urnal and nocturnal habits of Pronuba, 154 How the female moth 

 fertilizes the plant, 154 Oviposition, 155 The larva within the young 

 fruit, 155 Description of the larva, 155 Only a small percentage of 

 fruit not infested by the larva, 15G The larva leaves the capsule and 

 enters the ground for hibernation, 156 Mutual adaptation of plant 

 and insect, 156 The rnoth doubtless occurs wherever Yuccas grow 

 wild, 157 Easy transportation of the cocoon, 158 Further facts 

 regarding the fructification of Yucca filamentosa and gloriosa, 158 

 Yuccas seeding in Europe, .159 Range of the insect, 159 Mr. Stain- 

 ton's opinion on the characters of the Yucca moth, 160. 



REPORT VI. 



[Submitted December 2, 1873; published March, 1874. J 



Table of Contents 3 



Preface 6 



NOXIOUS INSECTS. 



Notes of the Year 9 



THE CODLING MOTH 9 



Failure of the apple crop in 1873, 9 Dr. LeBaron's observations on the 

 habits of the worm, 9 Proportion of worms leaving the fruit before 

 it falls, 10 How it affects pears, 10 Time and method of using ban- 

 dages, 10 Westward spread of the insect, 10. 



THE COLORADO POTATO-BEETLE ; 11 



How it has affected the price of potatoes, 11 New food-plants, 11 Its 

 progress eastward during 1873, 12 Improved methods of using Paris 

 green, 13 Device for jarring off the bugs, 14 European publications 

 on the insect, 15 Danger of its introduction into Europe, 15 Pre- 

 cautionary measures to be taken in Europe, 16. 



THE COTTON WORM 17 



Paris green suggested as remedy, 17 Address before the National Agri- 

 cultural Congress, 17 Mr. Glover's summary on experience with Paris 

 green, 19 Experiments with the poison, 19 Johnson's Sprinkling 

 machine, 20 Patents on Paris green, 20 The Royall mixture, 21 

 Hibernation of the insect, 22 Natural enemies, 23 Geographical 

 range, 23 Position of the moth when alighting, 24. 



THE CANKER WORM 24 



Dr. LeBaron's summary of remedies, 24 Mr. Milliken's experience with the 

 rope and tin trap, 25 The Paris green remedy, 26 A new trough, 26 

 Birds which destroy the worm, 27 Mr. Mann's observations on the in- 

 sect, 28 Two species have hitherto been confounded, 28 The English 

 Sparrow and the increase of the White-marked Tussock-moth, 29. 



Insects injurioiis to the Grape-vine 30 



THE GRAPE PHYLLOXERA 30 



The term " Phylloxera", 30 Bibliographical history, 30 Characters of 

 the genus and its position in the system, 33 Biological history, 33 

 Different forms which the insect assumes, 33 The gall-inhabiting 

 form, 34 The root-inhabiting form, 38 Balbiaui's discovery of the 



