INDEX 



2/7 



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 



