33 



Diabrotica longicornis, sjjread of, in Ohio, XX, fi9. 

 trivittata, food habits of, XIX, 51. 

 vittata, abundant in Maryland, IX, 81; XXVI, 83. 

 effect of cold winter on, XXII, 58. 

 egg of, XIX, 48. 



especially injurious to melons, XX, 66. 

 in Colorado, XXVI, 80. 

 methods of controlling, XIX, 49. 

 Diacanthus peneus, injuring cereal crops in Norway, IX, 79. 

 Diaprepes abbreviatus, injuring guava, XXX, 97. 

 Diaspis amygdali = pentagona. 



cacti, in Georgia, XXVI, 51. 

 pentagona, in Georgia, XXVI, 51. 



Massachusetts, XVII, 64. 

 Ohio, XVII, 101. 

 experiments in spraying, XXX, 33. 

 rosse. See Aulacaspis. 

 Diatrsea saccharalis, abundant in Maryland, XVII, 93. 

 effect of cold winter on, XXII, 56. 

 in cornstalks in Georgia, XX, 58. 



1900, XXX, 68. 

 injury by, in Porto Rico, XXII, 89. 

 striatalis, synonym of Proceras sacchariphagus, XVIII, 90. 

 in sugar cane, XVIII, 90. 

 Dibrachys boucheanus, parasite of Orgyia leucostigma, IX, 16. 

 Dictyophorus reticulatus, damage by, in Mississippi, XXX, 28. 

 Diglochis omnivora, parasite of brown-tail moth, XVII, 28. 

 Dinoderus substriatus, destructive to tan bark, XX, 107. 

 Diplosis pyrivora, damage by, in Maryland, IX, 82. 

 rosivora, destroying rosebuds, XXII, 44. 

 sorghicola, a new species on sorghum, XVIII, 81. 

 tritici, abundant in Ohio, XX, 69. 



in Canada, XXVI, 96. 

 violicola, injuring violets, XXII, 48; XXVII, 47. 

 Disease, flies carrying, XXX, 39. 

 Disonycha caroliniana, living on purslane, XVIII, 83. 



quinquevittata, swarming in Arizona, XVIII, 100. 



migration of, XXX, 97. 

 triangularis, injuring beets in Ohio, VI, 68. 

 xanthomeLT?na, habits and life history of, XIX, 80. 

 in 1900, XXX, 69. 

 Dissosteira Carolina, abundant in Montana in 1895, VII, 33. 

 damage by, in Mississippi, XXX, 29. 

 longipennis, abundant in Colorado in 1895, VII, 31. 

 Nebraska in 1896, VII, 36. 

 obliterata, abundant in ^Montana in 1895, A"II, 33. 

 Distribution of insects, II, 91. 



parasites, V, 17. 

 Docophorus acutipectus, host of, V, 223. 



agelaii, descrijition of, VI, 220. 



atricolor, host of, V, 223. 



bassanse, host of, \, 217. 



bisignatus, host of, V, 217. 



bubonis, description and host of, V, 219. 



4991— No. 36—02 3 



