286 



EXPLANATORY INDEX. 



Simulia, history of, 3 ; figured, 5 

 Simuliites, an order of Diptera, 



218 

 Sirecites, an order of Hymenop- 



tera, 241 

 Sirex, a genus of Sirecites, 241 ; 



figured, 230 

 Skeleton of insects, 133 ; of large 



water-beetle, figured, 133 

 Skippers, Hesperites, an order of 



Lepidoptera, 210 

 Slow-legged beetles, Blapsites, 



an order of Coleoptera, 247 

 Smaragdinus, an intensely bright 



gold green colour, 175 

 Snake-flies, Raphidiites, an order 



of Neuroptera, 269 

 Social ants, Formicites, an order 



of Hymenoptera, 231 

 Social bees, Apites, an order of 



Hymenoptera, 236 

 Soft-winged beetles, Cebrionites, 



an order of Coleoptera, 250 

 Soldier-beetles, Pyrochroites, an 



order of Coleoptera, 248 

 Solitary ants, Mutillites, an order 



of Hymenoptera, 231 

 Sphecites, an order of Hymenop- 



tera, 230 

 Spheridiites, an order of Coleop- 

 tera, 254 

 Sjihexes, Sphecites, an order of 



Hymenoptera, 232 

 Sphingites, fly at twilight, 101 ; 

 exotic specimens of, often sup- 

 plied as British, 101 ; natural 

 order of Lepidoptera, 210 

 Sphinx Vespiformis, an essay on 



classification, 208 

 Spiracula, the external apertures 



of the trachese, 192 

 Spurge hawk-moth, Deilephila, 



figured la. 90, im., 209 

 Squamous, covered with distinct 



scales, 177 

 Squamosae, (alae) when covered 



with scales, 165 

 Stag-beetles, Lucanites, an order 



of Coleoptera, 252 

 Staphylinites, an order of Coleop- 

 tera, 256 

 Stephens, Mr., on a new mode of 



killing insects, 114 

 Sternellum, tlie name of the third 



section of the lower surface of 

 the segments of insects, 150 



Sternum, the under surface of the 

 segments of insects, 146 



Stigma, a portion of the wing, 167 



Stomach, ventriculus, functions 

 of, in insects, 185 



Stomoxites, order of Diptera, 221 



Stone-flies, Phryganiites, an order 

 of Neiiroptera, 269 



Stramineus, a pale yellow, the co- 

 lour of straw, 174 



Stratiomites, order of Diptera, 225 



Straus-Durckheim's nomenclature 

 of the parts of the skeleton, 150 



Strength and importance of an 

 arch taught by the white ant, 88 



Striatus, when the surface is 

 marked with longitudinally im- 

 pressed lines, 176 



Strio-punctus, when the surface is 

 covered with punctures arranged 

 in longitudinal lines, 176 



Stylopites, an aberrant order of 

 insects, 271 



Sulcatus, when the impressed 

 lines are deep, resembling fur- 

 rows, 176 



Sulphurous, a pale delicate yellow, 

 the colour of brimstone, 174 



Sun-loving flies, Helophilites, an 

 order of Diptera, 226 



Surface of skeleton in insects, 171 



Syrphites, order of Diptera, 226 



Tabanites, order of Diptera, 220 



Tabanus, a genus of Tabanites, 

 221 ; figured, 216 



Tachydromiites, an order of Dip- 

 tera, 224 



Tarsus, the terminal portion of the 

 leg in insects, 170 ; figd. 169, a 4 



Tegula, the small tubercular plate 

 at the base of each fore wing in 

 Hymenoptera, 149 



Telum, the thirteenth or last seg- 

 ment of insects, 146 ; figured, 

 137, Y ; on the uses of its ap- 

 pendages, 171 



Tenthrediniles, an order of Hy- 

 menoptera, 243 



Tephritis, a genus of Tephritites, 

 figured, 228 



Tephritites, order of Diptera, 227 



