Jan. 15, 1920 



Mediterranean Fruit Fly in Hawaii in igi8 



443 



higher than in previous years. Notable among these hosts are the Indian 

 almond (Terminalia catappa), coffee {Coffea arahica), strawberry guava 

 (Psidium cattleianum) , and French cherry (Eugenia uniflora). The most 

 important of the abundant host fruits producing low percentages of para- 

 sitism are the mango, kamani (Calophyllum inophyllum), Chinese orange 

 {Citrus sp.), and guava {Psidium guajava). The low paiasitism of 

 the larvae developing in these latter, especially in the guava, large areas 

 of which are growing in all parts of the islands, strongly indicates that 

 these fruits are the source of supply of the large number of fruit flies which 

 cause the continual high infestation of favored hosts. 



Table II. — Percentage of larval parasitism of Ceratitis capitata in Hawaii'^ 



Host fruit. 



Month of collection 

 in 1918. 



Number 

 of larvse 

 emerging 



during 

 first 2 to 



6 days. 



Percentage of pararitism. 



Optus 



hum- 



ilis. 



Dia- 

 chastna 

 iryoni. 



Dia- 

 ckasma 

 fulla- 

 ivayi. 



Teiras- 

 tichus 

 giffard- 

 ianus. 



Total. 



Indian almond. 



Mango. 

 Coffee. 



Strawberry guava. 



Black myrobalan. 



Peach . 



February. .. . 



March 



April 



May 



June 



July 



August 



September. . 

 October .... 

 November... 

 December. .. 



July 



January 



March 



April& 



September. . 

 October .... 

 November. . . 

 December. . . 



January 



February 



March 



April 



May 



July 



August 



September. . 



January 



February .... 

 October. . . . 

 November... 



Maxch 



April 



May 



June 



568 



2,69s 



92 



2, 134 

 8,707 

 5,125 

 2,746 



3,527 



5,748 



6,434 



1,526 



283 



410 



9 



1,510 



145 



681 



877 



37 



525 



186 



593 



1,531 



272 



741 

 1,004 



393 

 I, 104 



2,348 



190 



1, 166 



733 

 602 



581 



307 



1.8 



37-3 

 17. 2 



34-3 



17.7 



2.6 



.8 



1.9 



7-1 



31-4 



22. o 



2. I 



2. 2 



22. 2 



12. o 



2. I 



3-9 

 16. 2 



5-4 

 8.8 



9-7 



8.8 



15-7 



33-5 



. I 



•5 

 2. o 



•3 

 .6 



2. I 

 10. 7 



0-3 



36. I 

 59-8 

 63. 2 



37-9 

 26.6 



25- I 

 23- 4 

 39-6 

 10. 6 

 22. 9 



70. 5 



8-3 

 39- I 

 29.7 

 24. 6 



19-3 

 6.6 

 13.6 

 21. o 

 62. I 

 45- I 

 39- o 

 I. 2 



•5 



. I 

 •4 

 .4 

 . 2 

 . I 

 •3 

 .4 



10. 7 



11. I 

 8.6 



39-3 

 27. 6 



4-4 

 10.8 



2-3 

 20. 4 

 10.8 



5- I 

 I. I 

 I. 2 

 6.9 

 20. 7 

 1-3 

 •3 



o. 2 

 4-5 

 4-3 

 2.9 

 1.6 

 3-2 

 5-5 

 15-4 



II. o 



13-7 

 II. 7 



•7 



4. 4 



•5 

 1-7 



I. o 



4.0 



2-5 



21. 4 



6.9 



•5 



4. I 



53- o 

 21. 7 



73-3 

 79. I 

 69. I 

 44.6 



44-3 

 43-4 

 68.6 

 73-6 



35-8 



91. I 

 41.4 

 39-8 

 59-7 

 45-9 

 40. I 



49 

 27 

 35 

 59 

 65 

 73 



9 

 9 

 4 

 6 



9 

 9 



68.6 



Z-2, 

 1-5 



•7 



•3 

 2. 2 



15-3 



2. I 



2-3 

 5-0 

 9.1 



3-8 



3- 7 

 I. o 



16. 



10. 7 



4-3 

 6.9 

 8.9 



40. 7 



o The majority of the fruits listed in this table were collected about Honolulu at low elevations. Much 

 of the coffee, however, was collected on the island of Hawaii and in the country districts of the island of 

 Oahu and came from points i , 000 to 2,000 feet above sea level. 



6 The April collections of coSee came from the Kona district of the island of Hawaii. 



