151 
Séance dii 16 Avril 1924 
From the known development data from the Ha- 
wai Islands and from Italy we obtain a duration of 
development of 20 days for 26° G, and of 4 1,7 days 
for 19,0° G. These two points enable us to construct 
the equilateral hyperbola by estimating any other 
point of the following curva. 
TABLE I 
Temperature-Development Curve of Ceratitis capitata 
after the Blunck-Forimula. 
The critical cold-point is found for Ceratitis ca¬ 
pitata to be 1 3 , 5 ° C. The application of Table 1 to the 
countries, which are or may be infested by the Me¬ 
diterranean fruit-fly, is shown by Table 2 and 3 . 
11 
Bull. Soc. R. Entomologique 
