PARASITISM OF MEDITERRANEAN FRUIT FLY IN HAWAII 9) 
from the trees usually have a very low parasitism by T. giffardianus. 
Fleshy fruits with comparatively thin skins which are broken easily 
offer a much better opportunity for the parasite to work. 
The data in Table 3 sbow the effectiveness of each species of para- 
site in each host fruit under observation for the second to sixth day of 
each month stated. Indian almond is a good example of a fruit 
containing a large seed surrounded by thin pulp. The opiine para- 
sites were much more effective than 7. giffardianus during all periods 
for which records were kept for the 3-year period with the exception 
of January, 1922, and the last five months in 1923. During those 
five months large numbers of this fruit were collected within an area 
of about four city blocks, and owing to some undetermined cause 
T. giffardianus was able to parasitize an unusually large number of 
the developing maggots. 
