DIGESTION- 

 TABLE I 



49 



Insect 



Food 



Enzymes 



Salivary 

 glands 



Mid-gut 



ORTHOPTERA 



Cockroach {Peri- 

 planeta ameri- 

 cand) 



COLEOPTERA 



Japanese beetle 

 {Popillia japon- 

 ica) 



HYMENOPTERA 



Honey-bee {Apis 

 mellifica) 



LEPIDOPTERA 



Silkworm {Bom- 

 byx mori) Larva 



Humming bird 

 hawk moth 

 {Macroglossa 

 stellatarum) 

 Adult 



DIPTERA 



Blowfly {Lucilia 

 sericata) Larva 



Blowfly {Calli- 

 phora) Adult 



Chrysops silacea 

 Adult 



Tsetse-fly 

 sina) 



{Glos- 



Omnivorous 



Foliage 



Amylase 



Nectar and \ Amylase; 

 pollen invertase 



Foliage 



Nectar 



Flesh 



Liquid food 

 of all kinds 



Female : 

 blood. 

 Male: nec- 

 tar, &c. 



Blood 



Invertase 



Amylase 

 (very 

 weak) 



Amylase 



Nil 



Nil 



Amylase; maltase; 

 invertase; tryptase; 

 peptidase; lipase 



Maltase; invertase; 

 tryptase; lipase 



Amylase ; invertase ; 

 tryptase; lipase 



Amylase; maltase; 

 invertase (chiefly in 

 the cells); tryptase; 

 peptidase (only in the 

 cells); lipase (in very 

 small amounts) 



Invertase 



Tryptase; collagen- 

 ase; peptidase; lip- 

 ase 



Amylase; maltase; 

 invertase; weak 

 tryptase and pep- 

 tidase 



Very weak amylase; 

 strong invertase; 

 tryptase; peptidase 



Very weak amylase; 

 strong tryptase; pep- 

 tidase 



