158 



Melon-Fly Parasite t : 

 Opius fletcheri 15,221 690 729 175 . . . 16,815 



Corn Leaf-hopper 

 Parasite § : 

 Paranagrus oshorni 59,776 23,350 5,100 21,250 ... 135 109,611 



It is interesting to note in this connection that the examination 

 of a vast quantity of fruit-fly material by the U. S. Bureau of 

 Entomology office in Hawaii shows an increase of about ten per 

 cent in the total parasitism in the fruit fly during the past year, 

 and the facts brought out in their work are confirmed by the 

 greater abundance of fruits in the markets, i, e., Kona oranges. 



The inability to undertake new work has afforded leisure for 

 study, and many of the problems connected with the control of 

 insect pests have been gone over afresh ; it has also allowed the 

 Entomologist to undertake a considerable amount of systematic 

 work on the Board's collection of insects, which has been greatly 

 improved. In connection with this work three papers have been 

 published by the Entomologist, as follows : 



''Description of a New Species of Spalangia" (Proc. Hawaiian 

 Entomological Soc. Ill, p. 202, Dung Fly Parasite) ; "Notes on 

 Hawaiian Prosopidae" (in course of publication) ; "A New Genus 

 Pteroptricine Aphelininae (Mealy Bug Parasite)" (in course of 

 publication). Papers are also in preparation on the "Natural 

 Enemies of Coccidae," and on "The Collection of Braconidae 

 Made bv Mr. F. ]\Iuir During the Progress of the Cane Borer 

 Work, 1907-1911." 



Respectfully submitted, 



David T. Fullaway, 



Entomologist. 



REPORT FOR APRIL. 



Honolulu, May 22, 1918. 

 Board of Commissioners of Agriculture and Forestry, Honolulu. 



Gentlemen : — During the month of April the insectary handled 

 20,300 pupae of the melon fly, from which there were bred 818 

 females and 679 males Opius fletcheri. 



The distribution of parasites was as follows : 



t Liberated at: — Oahu: Moiliili, Niu, Honolulu, Mokuleia, Waianae, Pearl 

 City, Castiier. Hawaii: Paauliau. Kauai : Hanalei, Lihue, Kealia. Maui: 

 Hana, Haiku. 



§ Liberated at: — Oahu: Honolulu, Kailua, Moiliili, Waipio, Pearl City, 

 Kaneohe. Maui: Kula, Haiku, Makawao. Kauai : Lihue, Kilauea, Kapa'a, 

 Kealia, Waimea. Lanai: Keomuku. 



