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i11 further to strengthen our position on this subject I made a series of dis- 
gt of fruit-fly larvae collected from coffee in Kona, and the results have 
act ly confirmed our original contentions as regards the suppression of Opius 
is by the Diachasmas. I found no new changes in the relationships of these 
ites when occurring in the same fly larvae, 
y KEKE Another careful examination of the guavas growing in Kona dis- 
rict was made to establish further proof of the preference of the fruit fly tor 
joffee over the guava, A total of 433 overripe guavas were examined from trees 
roWing along paths in the center of a coffee plantation, Only 3 of these 
ved any signs of infestation or bore the characteristic egg punctures, A 
al of 184 very ripe guavas was then examined from trees growing a mile below 
coffee plants, Of these 119 were well infested with eggs and larvae of the 
it-fly. In the first case the fruit-fly had undoubtedly preferred the coffee 
xe the guavas, and in the second case no other host occurred within a mile of 
the guavas. 
A new host of the fruit-fly has been found by Mr..0, H, Swezey. This 
Capparis sandwichiauna, a native cruciferous shrub, the small fruits of which 
e attacked by the fruit-fly and the larvae develop to maturity.. 
, The green scale of coffee (Coccus viridis) which has been more or less 
injurious in the Kona coffee district for a number of years is at present so 
completely checked by a fungus Ophionectria sp, and 3 or 4 species of parasites, 
the determinations ef which I am not yet certain, that it is in no way destruc~ 
tive. I found no coffee plants in the district that had but small numbers of 
the living scales on some of the branches, As I understand that complaints 
have reached Washington about the destructiveness of this scale in coffee in 
the Kona district and that requests have been made for the assignment of a 
Specialist to study methods of controlling it, I am reporting the present ef- 
fect of this natural control and will venture to predict that these checks 
that are at present so effective can always be depended upon to avert any dis= 
astrous outbreak sof the scale in the future, 
" An investigation was made in Kona of the extent of parasitism of the 
‘pink bollworm, It was very low, From 610 larvae or pupae collected only one 
species of parasite emerged. This parasite Parasierola emigrata is not effective. 
Sixty individuals emerged from the collected material and as from 5 to 10 develop 
on a single bollworm larva, this is a very low degree of parasitism. In March 
a total of 200 mature cotton bolls collected about Honolulu produced 400 adult 
bollworms, 1 Chalcis obscurata, 3 Pteromalids (Sp, not determined), 31 Chelonus 
‘blackburni and 1 Pimpla hawaiiensis, This is also a low degree of parasitism. 
The parasites are interesting however, particularly the Chelonus, which is a 
braconid and attacks the egg and later emerges from the maturg larva, Other 
parasites are recorded on Oahu. 
] HHEHY The torpedo bug, Siphanta acuta, a fulgorid which was once de= 
® structive here on. coffee, mangoes, and guavas, owing principally to the honey 
dew secreted, is perfectly controlled by an egg parasite, Aphanomerus_pusillus, 
introduced about 1905. Having had a good opportunity in Kona to examine a 
“tity of egg masses of the Siphanta, I did so, with interesting results, Fifty- 
‘four egg clusters comprising 4 total of 2,489 eggs were examined under the 
Microscope, Of these, 1,929, or 77.5% were parasitized by this parasite, It is 
the only parasite recorded here of the Siphanta, The Siphanta was formerly a 
