367 
very clean and satisfactory, and I find that our dealers are 
very anxious to abide by the law, rules and regulations. 
Much of my time was taken up with the investigation of 
the Mediterranean fruit fly, a report of which has already 
been submitted to the Board. 
The Inspector at Hilo, Bro. M. Newell, reports the arrival 
of six steamers and one sailing vessel, of which four steamers 
brought fruit and vegetables consisting of 104 lots and 1688 
parcels, which, being free from pests, were passed, except 25 
bags of potatoes, which he ordered cleaned. 
Further investigations of the disease which is killing off 
the Hitchcock or thimble berry in certain sections of Ha- 
waii, show that it is doing good work against the berry. We 
have submitted the matter for determination to Dr. H. L. 
Lyon of the H. S. P. A. Experiment Station, and have fur- 
nished him a diseased plant. Dr. Lyon has been able to 
make cultures of the disease and thinks that the disease is a 
Clypeosphaeria sp. There is a record of some of these species 
attacking the Rubus species in the States, and it is not im- 
probable that the disease has been brought in on some culti- 
vated plant, raspberry or blackberry, and has spread to the 
thimble berry. We shall try and infest some healthy plants 
at the laboratory and we shall also endeavor to introduce 
the disease into some healthy patches away from the areas 
which now show the disease, with a view of ascertaining 
whether or not we can spread it artificially and aid in the 
rapid destruction of the plant pest. 
Attached hereto I submit a brief report of the Assistant 
Entomologist for the month of October. 
Very truly yours, 
Edw. M. Ehrhorn, 
Superintendent of Entomology. 
ASSISTANT entomologist’s REPORT. 
Honolulu, October 31, 1910. 
Mr. E. M. Ehrhorn, Superintendent of Entomology, Hono- 
lulu, T. H. 
Sir : — My investigations during the past month have been 
practically along the same lines as indicated in my earlier 
reports. I have continued to devote a large part of the time 
to work in the field with experiments and observations on 
various garden pests and in demonstration work. The field 
work has been supplemented, in the insectary, by breeding 
experiments. 
I am making an especially careful study of insects which 
are injurious to cabbage. The results which I have ob- 
