294 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



2119. KLLEY, C. V. Continued. 



SCALE INSECTS OF THE ORAJNGE Continued. 



enemiea of scale insects, 49 Hymenopterous parasites the most 

 efficient destroyers, 4'J Sudden outbursts of the pest, 50 De- 

 struction of the scales by their own undue increase, 51 Injury 

 inflicted on young trees, and faulty methods of destroying the 

 scales, 51 Recapitulation, 51 Remedies, 52 Danger in apply- 

 ing undiluted volatile oils, 52 Kerosene, when properly applied, 

 not injurious to the tree, 52 Process of preparing kerosene 

 butter, 52 Nature of kerosene butter, 53 How it should be ap- 

 plied, 54 The kerosene butter a sure remedy, 54 How it affects 

 the scales and the eggs, 54 The aquapult force-pump very 

 convenient for applying kerosene emulsions, 54 Effect of kero- 

 sene emulsion on the tree, 55 Kerosene emulsions experimented 

 with, 55 Whale oil soap as remedy, 56 Oil of creosote, its 

 effect on scale insects and on the trees, 56 Saponaceous com- t 

 pounds of creosote, 57 Creosote inferior to kerosene as insecti- 

 cide, 57 Various other substances as remedies, 57 Tables of 

 experiments, 60 Note on more recent discoveries in producing 

 kerosene emulsions, by C. V. Riley, 67. 



INSECTS AFFECTING THE RICE-PLANT 67 



Rice production in the United States in 1879, 67. 

 The rice-grub, Chalepus trachypygus 68 



Mr. L. O. Howard's observations on the occurrence and habits of 

 the insect, 68 It can easily be kept in check, 68 Structural char- 

 acters and geographical distribution of the genus Chalepus, 69 

 Description of imago and larva, 69. 

 The water-weevil, Lissorhoptrus simplex 70 



Colonel Screven on the specific identity of "the maggot" and "the 

 water-weevil," 70 Mr. L. O. Howard's report on the occurrence 

 of larva and beetle in rice-fields, 70 Habits of the beetle, 71 

 Remarkable shape of the larva, 71 Characters of the genus Lis- 

 sorhoptrus, 72 Description of the imago, 72 Description of the 

 larva, 72. 

 The rice-stalk borer, Chilo oryzwellus 73 



Mr. Howard's account of the work of the larva and the damage 

 caused by it, 73 Enemies, 74 Preventive measures, 74 Difficul- 

 ties in the specific determination of the insect, 74 Characteris- 

 tics of the genus Chilo, 75 Description of the moth, 75 Descrip- 

 tion of larva and pupa, 75. 

 White blast 76 



Colonel Screven's account of the disease, 76 Mr. Howard's observa- 

 tions on the insects found on the diseased plants, 77 The blast 

 possibly caused by insect work, 77. 

 Other insects rnjurious to growing rice 78 



The "grass-worm" and its injury, 78 The "lubber grasshopper," 

 78 Aoridium obscurum and various Heteroptera, 78. 



INSECTS AFFECTING CORN OR MAIZE 78 



The corn-bill bug, Sphenophorus robustm 78 



Species of Spheuophorous injurious to agriculture, 78 Nature of 

 damage done by the beetles, 79 Mr. Howard's report on the work 

 of the larva and its development, 79 Preventive measures, 80 

 Burning the stubble in winter time to be recommended, 80 Gen- 

 eric characters of Sphenophorus and its natural groups, 80 Diag- 

 nosis of the imago, 81 Description of the larva, 81 Larva of 



