INDEX 



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ventral cord, 134, 138 



yolk cells, 240 

 Gryllotalpa, mesenteron, 72, 74, 77 



mesoderm, 50 



yolk cells, 240, 242, 244 

 Gryllus, corpora allata, 163 



mesenteron, 74 



mesoderm, 50 



oenocytes, 182 



sex cells, 219 



stomatogastric system, 159 



yolk cells, 242, 244 



Hacker, germ cells, 219 

 Hallez, law of, 4 

 Hammerschmidt, mesenteron, 74, 

 77 



yolk cells, 244 

 Hatschek, nervous system, 124, 

 138 



tracheae, 175 



tracheal invaginations on gna- 

 thal segments, 174 

 Head, muscles of, 177, 191, 206, 207 

 Head capsule, 180 

 Heart, development, 201, 204, 205, 

 259 



larva, 99, 193 

 Hegner, sex cells, 219 

 Heider, blastoderm, 34, 40, 42 



frontal ganglion, 159 



mesenteron, 73, 76 



mesoderm, 208, 210 



oenocytes, 181 



optic lobe, 154, 157 



rate of development, 248, 249 



segmentation, 55 



tentorium, 179 



yolk cells, 241 

 Hemiptera, oenocytes, 182 

 Henking, cleavage, 25 



cortical layer, 14 

 Henneguy, chorion, 7 



cleavage, 25 



sex cells, 219 

 Hertwig, mesenteron, 72 

 Heymons, brain, 157 



commissures of brain, 155 



corpora allata, 122, 161, 163 



dorsal diaphragm, 195, 205 



frontal ganglion, 159 



median cord, 139, 140 



mesenteron, 73, 74, 76, 77 



mesoderm, 50, 208, 210, 211 



muscles of hind intestine, 207 



nerve fibres, 135 



neuroblasts, 130, 139, 166 



oenocytes, 182 



optic ganglion, 153 

 protocerebrum, 117 

 proventricular valve, 226 

 segmentation, 108 

 sex cells, 218, 219 

 tentorium, 179 

 tritocerebral segment, 109 

 yolk cells, 240, 241, 242, 244 

 Hind-intestine, development, 244, 

 260 

 larva, 98, 220, 221 

 muscles, 192, 207 

 Hirschler, appendages on trito- 

 cerebral segment, no 

 ectoderm, 61 

 Malpighian tubules, 228 

 median cord, 141 

 mesenteron, 61, 73, 74, 77 

 mesoderm, 50, 209, 210, 211 

 neuroblasts, 130, 132 

 oenocytes, 183 

 primary dorsal organ, 93 

 sex cells, 219 

 Historical review of literature, 1-3 

 Hydrophilus, blastoderm, 34, 40, 42 

 cleavage, 25 

 lateral folds, 45 

 median cord, 141 

 mesenteron, 73 

 mesoderm, 49, 208, 210 

 oenocytes, 182, 186 

 optic lobe, 154, 157 

 rate of development, 248, 249, 



250 

 segmentation, 55 

 yolk cells, 241 

 Hylotoma, abdominal appendages, 

 112 

 amnion, 87 

 Hymenoptera, abdominal append- 

 ages, 112 

 amnion, 87 

 frontal ganglion, 159 

 mesoderm, 210 

 number of ganglia in ventral 



nerve cord, 138 

 optic lobes, 153, 154 

 optic plate, 154 

 yolk cells, 244 

 Hypodermis, 134, 179, 180 

 Hypopharyngeal papillae, in 

 Hypopharynx, 156 

 Indusium, 94 



Inner cortical layer, 31, 34, 35, 38, 



40, 42, 238, 254 

 Intercalary segment, 109 

 Iron haematoxylin, 252 



