156 



emergence records has been difficult. It can be stated, however, that 

 all negative results recorded in these tables are first emergence re- 

 cords. In the main the percentages in Tables II.-V. are believed to 

 contain very few but first emergence records and fairly represent 

 the control exerted by Opius humilis in Honolulu during the months 

 covered. There has been found a wide range in parasitism even 

 among larvae first emerging from the fruit taken at different times 

 from the same tree, thus proving that no percentage, no matter how 

 high or how low, can be taken as representative of any particular 

 locality. 



Percentages of parasitism have not been secured for larvae 

 emerging from all host fruits. Parasites have been bred from 

 larvae developing in the ball kamani (Callophi/Uum inophyllum), 

 the Carambola (Averrkoa caramhola) , the Chinese orange (Citims 

 japonica), coffee (Coffea arahica), Eugenia (Eugenia michelii), 

 mangoes (Mangifera indica), Mimusops elengi, ISTatal plum (Bun- 

 chosia sp.) Ochrosia, the peach (Amygdalus persica-), the rose apple 

 (Eugenm jamhosa), the strawberry guava (Psidium cattleyanum) , 

 the Bestill (Thevetia neriifolia) , and the winged kamani (Term- 

 inalia ca-tappa). Only the percentages secured from larvae devel- 

 oping in coffee, Chinese oranges, strawberry guavas, bestills and 

 winged kamanis have been tabulated (see Tables I.V.). Other 

 data are given below^ : 



Ball Jcamami. One hundred and three larvae emerging from 

 samples of fruit gathered on x\ugust 15 in ISTuuanu Cemetery 

 showed a parasitism of 1.1 per cent. 



Caramhola. Larvae emerging during late September from 

 fruit gathered at 1516 Beretania St., Punahou Street, Maguire 

 and Spencer Streets, and 1008 Kapiolani St. showed a parasitism 

 of 45.4, 6.2, 75 and 12.5 per cent respectively. 



Coffee. The percentages given in Table I. show that parasit- 

 ism in Kona is very high. Larvae emerging from coffee cherries 

 gathered about the middle of ISTovember at Lanihau, Kahaloa, 

 Keei Mormon Church, and Kealakekua showed a parasitism of 

 97.8, 93.1, 83.4 and 76.6 per cent respectively. Samples of cherries 

 collected on October 30 and 31 at Honalu, Honaunau, Lanihau, 

 first Holualoa store, second Holualoa store, Kainaliu and Kalaua 

 yielded larvae showing a parasitism of 84.6, 70.9, 70, 34, 59.8,75 

 and 66.7 per cent respectively. The percentages of parasitism 

 among larvae in Kona coffee ran consistently high. This is due 

 in all probability to the abundance of fruit fly larvae and coffee, 

 and the ease with which the parasite can reach its host throuo'h 

 the thin skin of the coffee cherry. Larvae emerging in Honolulu 

 from cherries gathered during September from Judd and Liliha 

 Streets (two samples) ; Maternity Home, Beretania St. ; Booth 

 Estate, Pauoa Poad, and at 1972 Pauoa Poad showed a parasitism 



