INDEX 



2 75 



Contraction of egg, 95 

 Corethra, oenocytes, 181 

 Corpora allata, development, 161- 

 164, 257 

 larva, 122, 124 

 Cortical layer, 10, 27, 29, 31, 34, 35 

 254 

 inner, 31, 34, 35, 38, 40, 42, 238, 

 254, 255 

 Crepidula, cleavage nuclei, 22 

 Czerski, mesenteron, 74 



Deegener, mesenteron, 74 

 Degenerating cells, 164-166, 257 

 Dermaptera, brain, 157 

 inner cortical layer, 31 

 optic lobes, 154, 157 

 protocerebrum, 116, 117 

 tritocerebral segment, 109 

 yolk cells, 240, 241 

 Dermatoblasts, 126, 129, 130, 257 

 Deutocerebral segment, 107, 108 

 Deutocerebrum (deutocerebral 

 lobes), 115 

 development, 143, 144, 147, 148, 



164, 166, 255 

 larva, 100, 102, 119 

 Deutoplasm, 9, 15 

 Diaphragm, dorsal, development, 

 200, 201, 204, 205, 215, 259 

 larva, 193, 194, 195 

 ventral, development, 205 

 larva, 193, 196 

 Dickel, 3 

 blastoderm, t>3 

 cleavage, 26 

 irregular mistoses, 231 

 mesenteron, 71, "jt> 

 method of obtaining eggs, 245 

 rate of development, 246 

 yolk cells, 241 

 "yolk plug," 71, 92, 93 

 Dilators of pharynx, 156, 177 

 Diptera, yolk, 241 

 Dixippus, mesenteron, 74, yy 



yolk cells, 244 

 Dohrn, mesenteron, 72, 75 

 Donacia, appendages on tritocere- 

 bral segment, no, in 

 irregular mitoses, 231 

 median cord, 141 

 mesenteron, y^, 75 

 mesoderm, 210, 21 1 

 neuroblasts, 130, 139 

 oenocytes, 183 



primary dorsal organ, 93, 94 

 yolk cells, 235, 236 



Dorsal diaphragm, development, 

 200, 201, 204, 205, 215, 259 

 larva, 193, 194, 195 

 Dorsal longitudinial muscles, de- 

 velopment, 200, 201, 215 

 larva, 191 

 Dorsal organ, 94 

 Dorsal strip, 38, 43, 82, 83, 90, 255 

 Doryphora, Malpighian tubules 

 228 

 mesenteron, y^ 

 neuroblasts, 132 

 yolk cells, 234, 242 

 Drepanosiphum, mesenteron, 74 

 Drone egg, blastoderm, 36 

 cleavage, 26 

 mesoderm, 51, 52 

 polar bodies, 92, 93 

 Duration and rate of develop- 

 ment, 245-250 



Ectobia, mesenteron, 74 

 Ectoderm, 78, 80, 81, 124, 170, 178 

 222, 255 

 embryonic and non-embryonic, 

 179, 180 

 Egg, changes in form, 95, 97 

 color, 4 

 contraction, 95 

 membranes, 7 

 mode of deposition, 5 

 polarity, 4, 253 

 shape, 4 

 size, 4 

 Embedding in paraffin, 253 

 Embryo, external changes in form, 



97-105 

 Endoskeleton, 175-179 

 Endromis, mesenteron, y^ 

 Enteric muscles, development, 199, 

 201, 202, 203-210 

 larva, 192 

 Entoderm, 56, 75, yd 

 Ephemeridea, oenocytes, 182 

 Epineural sinus, 199, 200, 211 

 Epithcca, mesenteron, ys, 74 

 Escherisch, mesenteron, y^, yy 



neuroblasts, 132 

 External changes in form of em- 

 bryo, 97-105 

 External medullary mass, 155 

 Eye, compound, 151 



Fat body, evelopment, 199, 201, 

 203, 209, 210, 259 



larva, 193 

 Fat cells, 193, 216 



pericardial, 203, 259 



