GENERAL INDEX. 



227 



PAGE 



Siphonophora tussilaginis . . . i, 159 



— ulmarise . . . . i, 134 



— urticse . . . . i, 143 



— vicise . . . . i, 190 



— millefolii, Balbiani on the winter habitat of . iv, 74 



— solidaginis, Balbiani on the winter habitat of . iv, 75 

 Siphonophoroides antiqua . . . . iv, 176 



— simplex . . . • iv, 176 



Siphuncle . . . . . . i, 22 



Somites, number of . . . . i, 19, 21 



Sorby on colouring matter in Aphides . . ii, 170 



Spermatheca . . . . . . iv, 121 



Spermatozoa . . . . . • iv, 127 



Sperm capsules . . . . • iv, 128 



— cells . . . . . i, 129 



Spread of American blight .... iii, 91 



Steenstrup on alternation of generations . . . iv, 138 



Stemmata . . . . . i, 15 



Stomata, where placed . . . . i, 21 



Stomaphis quercus ..... iii, 62 



— Ingall's notice of, in England . . . iii, 63 



— Linnaeus on . . . . . iii, 64 



— rostrum of . . . . i, 17 

 Stonesfield beds, insects in . . . iii, 3 

 Subterranean European Aphides, list of . . iv, 104 

 Sudden appearance and disappearance of Aphides . iii, 57, 58 

 Sugar, the manufacture of, suggested from honeydew . iii, 55 

 Supplementary males .... iii, 20, 39 

 Swarms of Aphides . . . . i, 80 

 Sycophancy or Paracletism . . . . iv, 95 

 Synopsis of" classification . . . . i, 9 



— of Aphis ..... ii, 30 



— general . . . . . iv, 1 



— of Siphonophora . . . i, 102 

 Syrphidse . . . . . ii, 117 



— Bonnet on . . . . ii, 119 



— Reaumur on . . . ii, 119 

 Syrphus balteatus . . . . ii, 120 



Tendency to suppression of wing veining . . .iii, 42 



Tent-making Chalcids . . . . . ii, 85 



Terminology . . • . . . i, 11 



Tetraneura, general characters of . , iii, 131 



— ulmi ..... iii, 131 



— reported as feeding on grasses . . . iv, 72 

 Thelaxes, anatomy of the eye of . . . . iv, 14 



— reproductive organs, description of . iv, Plate D 



— shelter sought in oak galls . . . iv, 13 



— variation in wing veining . . . iv, 10 



— dryophila . . . . . iv, 8 

 Thorax and adjuncts . . . . i, 18 

 Thornton on Phyllophorus .... ii, 127 

 Thysanura, fossil remains of . . . iii, 4 

 Toxoptera graminum ... iii, 135 



