Pomona College Journal of Entomology 825 



ri'iioitcd \>y \V. T. Kirk of Nrw Zcaliiiid. Tliis im-ans tliat tin- probable cycle 

 for Sdutlicrii California would he: 



Deci'iiiher — Early citrus fruits. 



January and P^ebruary — Oranges and grapefruit. 



Mareh — Oranges, grapefruit and early loquats. 



April — Oranges, grapefruit and lotjuats. 



May — Oranges, grapefruit, some loquats and early cherries. 



June — Seatt-ering citrus fruits, cherries and early figs. 



July — Apricots and figs. 



August — Peaches, nectarines and pears. 



September — Peaches, nectarines, pears and i)]uiiis. 



October — Plums, quinces, apples. 



November — Doubtfully any. 



Consid-ering the similarity of prunes to plums and the similarity of the 

 almond to the Kaniaiii nut, these two might also serve as hosts and lengthen 

 the list. 



This discu.ssion, it will l)e noticed, is totally without reference to climatic 

 conditions, the relation of which to the fruit fly is very hard to accurately 

 determine. However, from the history of its work in similar latitudes in 

 Australia and South Africa, we have ample reason to think that should it liy 

 any means gain entrance to California, it could thrive in winter in some 

 .stage in the soutliern part of the state at least, and i)rove to this state and 

 country tlic most serious pest of its history. 



