19 

 DIVISION OF ENTOMOLOGY. 



REPORT OF THE ACTING ENTOMOLOGIST, DECEMBER, 1920. 



Honolulu, January 12, 1921. 

 Boar.i of Connnissioners of Agriculture ami Forestry, Honolulu, Hawaii. 



Gentlemen: — During the month of December the insectary handled 20,500 

 pupae of the melon fly, from which there were bred 3762 females and 2905 

 males, Oimis fletcheri. 



The distribution of parasites was as follows: 



MELON FLY PARASITES. 



Females. Males. 

 Opius fletcheri. 



Oahu : Xuuanu Avenue GHU 550 



Kalakaua Avenue 600 600 



Moiliili 550 500 



Moanalua 350 200 



Oahu Prison 150 150 



FEUIT FLY PARASITES. 



Galesus silvestri. 



Oahu : Wyllie Street 1300 



Dirliinus giffardi. 



Oahu : Wyllie Street 1000 



Diachasma tnjoni. 



. Oahu : Wyllie Street 150 150 



Diachasma fullaivayi. 



Oahu : Wyllie Street 100 100 



Tetrastichus gifardian us. 



Oahu : Wyllie Street 700 



CORN LEAF-HOPPER PARASITE. 



Pa ra n ag rus osb o rn i. 



Oahu : Honolulu 1500 



The entomologist left Honolulu on December 9, 1920, for Hongkong and 

 Calcutta on a quest for beneficial insects preying on the melon fly and for 

 wasps which are responsible for the production of fertile seed on trees of 

 the genus Fie us. 



Respectfully submitted, 



E. M. EHRHORX, 



Acting Entomologist. 



