Fruit Flies of the Ryuk\ u Islands 

 (Diptera: Tephritidae) 



The i)resent paper deals with Ihc fruit flies of the 

 -Ryukyu Islands, iiuluding Ainaini-Oshima Island. It 

 is based mainlj' upon material that was collected in 

 these areas from December 20, 1952 to May 25, lOSli, 

 as part of the Pacific Science Board's Scientific In- 

 vestigations in the Ryukyu Islands (SIRI) Program. 

 Funds for this imdertaking were made available by 

 the U.S. Department of the Army through their con- 

 tract 49-083 OSA 255 with tlie National Academy of 

 Sciences for the Board's SIRI Program. 



Until the ]n-esent time, the fruit flies of the Ryu- 

 kyus (including A miuni-Oshima Island) have been 

 known to consist of only seven species. In this study, 

 there are 34 sjjecies and one subspecies belonging 

 to six subfamilies of Tephritidae: Dacinae (10 sp.), 

 Trypetinae (12 sp.), Acinrinae (1 sp.), Tephritinae 

 (9 sp.), Euribimae (1 sp., 1 subs]).), and Sclii^lopicrinae 

 (1 sp.). These subfamilies are related to the Formosan 

 ones, but there were no Oedaspinae and Terelliinae. 

 Few of the sjjecies are injurious to agricultural crops, 

 except Sfrumeta cucurbltae and Tetradacun tsunconis, the 

 former attacking cucurbits and the latter citrus. 

 Although Strumefa dormlis is a serious pest of several 

 delicious fruits in tlie East Subtropical and Trojjical 

 Regions, it attacks only the fruits of a few forest trees, 

 mainly of Garcinia spicata Hook, in the Rjaikjii; how- 

 ever, in one case it has Ijeen reared from a tomato 

 at Yogi Agricultui'al Experiment Station in Okinawa 

 Island. Faradanis depressus is a pest of pumpkin or 

 squash in Japan, but in the Amami-Oshinui Island its 

 host-plant is still unknown. At present, tlie host- 

 plants of many other species are quite uidistinct. 



The writer wishes to express his sincere appreciation 

 and tiuuiks to Dr. S. Kato, chief of tlie Entomological 

 Section, National Institute of Agricultural Sciences, 

 Tokyo, Japan (NIAS), under whom this work was 

 done, not only for innumerable kindnesses and helpful 

 support but for an academic association that was of 

 inesthnable ^'alue and inspiration. To Dr. H. J. 

 Coolidge, Executive Director of Pacific Science Board 



(National Research Council), the author is also deeply 

 grateful and greatly indebted for a kindly, generous 

 interest in the progress of the work. 



The following abbreviations are used throughout 

 this paper to designate the depositories of the mate- 

 rial examined in this study. 



USNM United States National Museum, Washing- 

 ton, D.C. 



NIAS Entomological Museum, National Institute 

 of Agricultural Science, Tokyo, Ja[)an 



BMH Bernice P. Bishop Museum, Honolulu, Hawaii 



Key to the Subfamilies, Genera, Species, and Subspecies 

 of Fruit Flies Collected in the Ryukyu Islands (including 

 Amami-Osliima Is.) 



1. Dorsoceutral, piL'.siitural, sicrnoplcural, and ocellar Ijristlcs 



absent .Subfamily Dacinae: 2 



All laristles noted above always present S 



2. Antennae very elongate; first segment as long as second; 



abdomen strongly clavate and petiolate, first segment 

 parallel-sidc'd or uarrowci' ;it ajjex than at liase. 



Genus Callantra Walker 



Wings with a largi; blaekish apical spot; mesonotum with 



one pair of yellowish transverse spots just before the 



sutures, and one largo yellowish triangular postsutu- 



ral callus Callantra ihai, new species 



Antennae short, fir.st .segment conspicuously shorter than 

 second; abdomen not strongly petiolate, first segment 



distinctly widened toward apex 3 



.3. One pair of scutellar bristles 4 



Two pairs of scutellar bristles 



4. Prescutellar bristles absent, sometimes two anterior supra- 



alars; w'ings without supernumerary" lobe; abdomen of 

 male with eiliation on third tergum. 



Genus Tetradacus Miyake 

 Body rather slender, yellowish; abdomen more or less 

 petiolate; wing with a blackisli apical spot. 



Tetradacus Isuneonis (Miyake) 

 Prescutl'llar bristles present 5 



5. Third abdominal tergum of male ciliatc. 



Genus Strumeta Walker 

 a. Vein m-cu Ijordered with brown. 



Strumeta cucurbitae (Coquillett) 



