THE MEDITERRANEAN" FETJIT FLY. 
23 
and oranges in astonishingly small numbers because of the imper- 
viousness of the rag. It is the persistent attack of successive f amilies 
of larvae hatching from different batches of eggs laid in the same 
punctures that finally breaks down the barrier between the young 
larvae and the pulp. A fuller discussion of the infestation of all citrus 
fruits may be had on application to the Bureau of Entomology. 
Regardless of what has just been stated concerning the great 
mortality that occurs among the eggs and young larvae in the rind 
Fig. 22.— Cross section of grapefruit to indicate difficulty of always telling from exterior appearance of a 
fruit that maggots are eating out the pulp. (Authors' illustration. ) 
of grapefruit, oranges, and lemons, adult flies have been reared from 
them all. Lemons, however, have never been known to be infested 
in the pulp unless the rind has first become broken by thorn pricks, 
decays, or in some other mechanical manner. And in spite of the 
fact that oranges and grapefruit may become very wormy, as illus- 
trated in figures 2 and 22, they are usually uninfested in the pulp, 
and are fit for table use if they are gathered as soon as they ripen. 
But if citrus fruits were grown commercially in Hawaii in large 
