2«0 



INDEX 



inner cortical layer, 31 



median cord, 139, 140 



mesenteron, 76 



mesoderm, 50, 208, 210 



nervous system, 124-126, 130, 139 



neuroblasts, 126, 132, 139 



oenocytes, 182 



optic lobe, 117, 153, 157 



protodaeum, 116, 117 



sex cells, 218 



tritocerebral segment, 109 



yolk, 241 



yolk cells, 240, 241 

 Ostia, 194 

 Ovaries, development, 214-219, 259 



larva, 99, 213, 214 

 Palm en, tracheae, 175 

 Paracardial cells, development, 

 205 



larva, 196 

 Paracardial cellular cord, 195, 196 

 Paracarmine, Meyer's, 252 

 Paracytes, 242 

 Paracytoids, 235, 236, 241 

 Patten, mesenteron, 72 



oenocytes, 182 



optic lobe, 153, 154, 157 



segmentation of head, 107 



yolk cells, 240 

 Pellicle, protoplasmic of yolk, 43, 



84, 254 

 Periplaneta, mesenteron, 7^, 74 



mesoderm, 50 



proventricular valve, 226 



sex cells, 219 

 Petrunkewitsch, 3 



amnion, 82 



blastoderm, 36 



cleavage, 26 



fixing fluid. 252 



genital organs, 216 



mesenteron, jt, 



mesoderm, 51 



method of securing eggs, 245 



polar protoplasm, to 



rate of development, 248 

 "RZ" cells, 92, 93 



yolk cells, 231 

 Pbaryngeal ganglia, development, 

 159, 160, 257 



larva, 122, 124 

 Pharynx, 220 

 Phyllodromia, mesenteron, 73, 74, 



77 

 mesoderm, 50 

 Picro-formol, 251 

 Picro-sulphuric, acid, 251 

 Picris, mesenteron, 72 



mesoderm, 50 

 yolk cells, 240 

 Platygaster, amnion, 87 

 cleavage, 25 

 mesenteron, 72, 

 Polar protoplasm, 10 

 Polarity of egg, 4 

 Polistcs, amnion, 87 

 blastoderm, 34, 35 

 cleavage, 25, 26 

 cortical layer, 14, 15 

 polarity of egg, 4 

 Pontia, mesenteron, 72 

 Pratt, mesenteron, 74 

 Premandibular appendages, 101, 



109, no 

 Premandibular segment, 109, no 

 Primary head division, 106 

 Primary yolk cells, 230, 240, 254, 



260 

 Primative swellings, 127, 129, 130, 



138, 255 

 Procephalic lobes, 100, 142, 143, 



255 

 Procephalic organ, 94 

 Proctodaeum (proctodael invag- 

 ination), 67, 102, 103, 104, 224, 

 225, 228, 229, 260 

 Protocerebral segment, 107, 108 

 Protocerebrum (protocerebral 

 lobes), 115, 116 

 development, 100, 102, 142, 143, 

 144, 145, 147, 148, I49-I5S, 157, 

 164, 165, 166, 180, 255 

 larva, 117-119 



Orthoptera and Dermaptera, 116 

 Protoplasm, of egg, 9, 10-13, 2 39> 



240, 254 

 Protoplasmic pellicle of yolk, 43, 



84, 254 

 Proventricular valve, 220, 226, 260 

 Pulex, mesenteron, 72, 

 Pyrrhocoris, mesenteron, 73 



mesoderm, 50 

 Rabito, mesenteron, 74 

 Rate of development, 245-250, 261 

 Recurrent nerve, 122 

 Respiratory system, 99 

 Rhagonycha, Blochmann's corpus- 

 cles, 14 

 chemical tests of eggs, 15 

 Rhoditcs, amnion, 87 

 cleavage, 25 

 mesenteron, 72 

 Riley, appendages on tritocerebral 

 segment, 109 

 tentorium, 179 



