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insects on the return of the Flaurence Ward, and shall know 
better what to recommend after seeing what pests they have 
to contend with. 
We also sent a lot of parasites of the Black scale (Saisettia 
nigra) to the Nahiku Rubber Plantation. Mr. Austin reported 
that the pest was quite bad there. This parasite is very 
efficient on the scale found over the Islands. 
The inspector at Hilo, Bro. M. Newell, reports nine vessels 
boarded during the month, two carrying vegetable matter 
consisting of 96 lots and 1738 packages, which he reports as 
being in remarkably clean condition. Bro. Newell visited 
Puna district and found the Thimble berry very abundant, 
only showing here and there a few diseased plants. Owing 
to the rainy weather he has not been able to go to Glenwood, 
but will do so about October 1st, when he will collect soil 
and plants and forward them to me. Nothing further can be 
reported regarding the killing off of this berry, as we have 
as yet not been able to determine the disease. 
A communication, which the President of the Board re- 
ceived from Mr. F. J. Lowrey, reporting about koa trees on 
the left-hand side of Nuuanu Valley above his place being 
in a dying condition, was referred to me, requesting me to 
look into the matter. 
I beg to report that I visited the locality in company with 
Mr. Ralph S. Hosmer, Superintendent of Forestry, and Mr. 
David Haughs and I found that the trees are not dying, but 
their unhealthy appearance is due only to defoliation caused 
by the common koa caterpillar, Scotorphythera idolias. The 
trees are already putting out new growth and will soon have 
their healthy appearance again. We also visited the planted 
groves at Mr. Lowrey’s place, but did not find any indica- 
tion of the caterpillar work ; in fact, the defoliated area seemed 
very local, and is a case of an extraordinary outbreak under 
favorable climatic conditions. I shall keep a watch on the 
infested area to ascertain whether or not a second brood will 
follow the first. 
Attached hereto I submit a report of the work of Assistant 
Entomologist, Mr. H. O. Marsh. 
Very truly yours, 
Edward M. Eh r horn. 
Superintendent of Entomology. 
ASSISTANT entomologist’s REPORT. 
Honolulu, Hawaii, Oct. 1, 1910. 
Mr. E. M. Ehrhorn, Superintendent of Entomology Hono- 
lulu, T. H. 
Sir : — During the month of September I have contirued my 
