103 
In March an experiment was started in Nuuanu Valley to determine 
whether Hilo grass may be overcome through the shading out of a 
stand of haole koa (Leucaena glauca) trees established by broadcast sowing. 
The Division participated in the Fourth Maui County Fair held at 
Kahului on October 13 to 15, 1921, by exhibits of trees, seeds, wood 
specimens, photographs of forest activities, working erosion model, and 
boughs of temperate zone coniferous trees such as spruce, pine, and cedar 
grown at 7,000 feet elevation on Haleakala. 
Initial steps were taken for giving better protection to the delicate 
native forest on the city watershed in Palolo and Manoa Valleys by the 
preparation of Eule V which has already received your consideration 
and approval. 
Eespectfully submitted, 
C. S. JUDD, 
Superintendent of Forestry and Chief Fire Warden. 
DIVISION OF ENTOMOLOGY 
ANNUAL REPORT FOR CALENDAR YEAR 1921 
January 30, 1922. 
Board of Commissioners of Agriculture and Forestry, 
Honolulu, T. H, 
Gentlemen: I am pleased to report as follows on the activities of 
the Division of Entomology in the annual period January 1 to December 
31, 1921. 
The propagation and distribution of beneficial insects, particularly 
the fruit fly, hornfly, and corn leaf hopper parasites have been continued 
throughout the year and a tabulation below gives the numbers of the 
different species liberated, according to islands, and references to place 
of liberation. 
The routine work of advising in regard to agricultural and stock 
pests and their control, the maintenance of the insect collections, etc., 
has also been faithfully performed. 
Three major projects however have engaged most of the time and- 
attention o:^ the Division, namely, 1. The investigation of the possi- 
bilities connected with the introduction and colonization of the capri- 
fying insects associated with the various species of fig trees (Ficus spp.) 
growing in Hawaii, as an aid to forestry; 2. The search for and intro- 
duction and colonization of various insects likely to aid in the control 
of the hornfly; 3. A study of the insects infesting the pineapple plant, 
with regard particularly to the possibility in controling the most in- 
jurious species by natural and artificial agencies. 
The fig insect investigations were undertaken in cooperation with 
the botanist and entomologists of the Hawaiian Sugar Planters' Asso- 
ciation and included in their scope seven species of figs native to the 
Oriental region namely Ficus retusa, infectoria, hispida, rumphii, lenjamina, 
lengdlensis and elastica. In the prosecution of these investigations the 
entomologist visited Japan, the Philippine Islands, Hong Kong, Singa- 
pore and Penang on the Malay Peninsula, and various parts of British 
India, studying the character of the trees and the relation of the capri- 
fying insects to them, the periodicity of the insectai and problems of 
transportation. The insects associated with each species were collected 
for study and numerous shipments of figs containing living fig wasps 
were made from Hong Kong. Where ripe figs were not obtainable ar- 
rangements were made to have them sent in season. A fuU report of 
this investigation appeared in the June Forester. 
