204 
W. E. BURGE AND E. L. BURGE 
gen peroxide in a bottle and the amount of oxj^gen liberated in 
ten minutes was taken as a measure of the catalase content of 
the material. 
FERTiLtZEOEGG 
AJewly /ifijcfiEP LfiR\//i 
QuflRTER Crgw^ L/lRVfl 
/^MOUNTS cpCf^rffLfJSL 
MEASURED //^ CC.O^ 
OXY6EN. 
/a 
3S 
£80 
— I^fw Qoo 
Half GRowr/ l/irva — M§W^ /^»5"o 
rL/LLCROWf^L/t/?m— \ 
PuP.q 
- /7SO 
/QOO 
/Idult Beetle: 
Olc Beetle 
/7S0 
900 
Fig. 1 The figures in the chart indicate amounts of oxygen liberated from 
hydrogen peroxide in ten minutes by 0.5 gram of the materia] ground in a mortar. 
The results of the determinations as well as photographs' of 
the beetles, pupae, larvae, and eggs are shown in figure 1. It 
may be seen that 0.5 gram of the unfertilized eggs liberated 18 
cc. of oxj^gen in ten minutes from hydrogen peroxide and 0.5 
gram of the fertilized eggs, 35 cc; that 0.5 gram of the newl}'-' 
hatched, quarter, half, three-quarter, and full-grown larvae 
