340 



report of this work will be made through the entomologist of the 

 Sugar Planters' Experiment Station, who made the introduction. 



Respectfully submitted, 



D. T. FULLAWAY, 



' Entomologist. 



Honolulu, Hawaii, September 5, 1916. 



Mr. Otto H. Swezey, 



Entomologist, H. S. P. A., 

 Keeaumoku Street, 

 Honolulu. 



Dear Sir : — Permit me to report on the work done at this in- 

 stitution in propagating the corn leaf hopper egg parasite, in- 

 troduced by Air. H. T. Osborn of your staft'. 



As you recall. I\Ir. Osborn arrived from Manila on the S. S. 

 Persia Maru, July 31, with two cases, one containing grass seed, 

 the other corn plants, with leaf hopper and parasites. The cases 

 were brought to the quarantine room of this institution, were 

 covered with black cloth, and holes bored in them which were 

 stoppered with glass tubes during the day time, and at night 

 with cotton stoppers. The material was very much mixed, in- 

 cluding leaf hopper nymphs and adults, aphis, thrips, agromyzid, 

 staphylinid, beetles, lace wing flies, and other small beetles, flies 

 and psocids. All of the extraneous material seen was either de- 

 stroyed at the window by crushing or put into alcohol. The corn 

 leaf hopper egg mymarid began issuing at once, and there were 

 obtained on the days following Julv 31 the following numbers: 



August 1, 37; August 2, 29; August 3, 28; August 4, 18; 

 August 5, 7; August 6, 2; August 7, 1 ; August 8, 1 ; August 10, 

 1; August 11, 10; August 12, 6; August 13, 1; August 14, 4; 

 August 16, 2; August 17, 2; August 19, 1 ; total, 150. 



There also appeared a few individuals of a dark colored 

 Cofefrastichiis, which Mr. Osborn had introduced into the cages 

 on the way over. Of these 3 females were obtained from the 

 cages, and Mr. Osborn handed me 1 female and 1 male, brought 

 by him in tubes. After mating, these individuals were liberated 

 in the cages established at this station. There was also one in- 

 dividual of a Staphylinid which emerged from Mr. Osborn's 

 cages, and wdiich I tried to breed, but it died without progeny. 



Of the mymarids recovered, Mr. Osborn took 43 individuals 

 to stock the cages at the Sugar Planters' Experiment Station, 

 101 were used to stock the cages here, and 6 were liberated on 

 the 1st of August on some corn at the nursery of this institu- 

 tion in Makiki Valley. 



