New combinations in Hawaiian Drosophila and Scaptomyza (Diptera: Drosophilidae) Author Magnacca, Karl N. Author O’Grady, Patrick M. text Zootaxa 2008 1926 53 60 journal article 10.5281/zenodo.184810 0547d82d-648f-4c20-b90e-bb88a45c0bce 1175-5326 184810 Key to the Hawaiian Subgenera and Unplaced Species of Scaptomyza , and Species of Subgenera Engiscaptomyza , Grimshawomyia , and Titanochaeta 1. White longitudinal stripe present on scutellum, anteriorly reaching at least to posterior region of mesono- tum, often extending along entire length of mesonotum; terminal fork of arista deep, each branch equal in length to dorsal rays of arista ............................................................................ subgenus Tantalia Malloch - Scutellum and mesonotum may be striped or unicolorous, but never with longitudinal white stripe described above; terminal fork of arista not deep, branches less than length of dorsal rays.......................2 2. Rays of arista short; chaetotaxy (e.g., katepisternal and dorsocentral setae) generally reduced; four rows of acrostichal setulae; two well-developed humeral setae .........................subgenus Exalloscaptomyza Hardy - Rays of arista elongate; combination of other characters not as above.......................................................3 3. Either zero or one ventral ray present on arista ......................................................................................... 4 - More than one ventral ray present on arista...............................................................................................10 4. Eight rows of acrostichal setulae present; female ovipositor sclerotized, may be needle-like and pointed.. ................................................................................................................. subgenus Titanochaeta Knab , 24 - Acrostichal setulae present in two to six rows; female ovipositor fleshy, non-sclerotized, non-dentate....5 5. Arista lacking ventral rays...........................................................................................................................6 - One ventral ray present on arista.................................................................................................................7 6. Head flattened, longer than high; eyes strongly oblique; strong set of presutural dorsocentral setae present ....................................................................................................................subgenus Rosenwaldia Malloch - Head nearly square as seen in direct lateral view, lower margin approximately equal in length to the fron- tal margin; enlarged setulae may be present in presutural position, but not strong....................................... ......................................................................................................................subgenus Elmomyza Hackman 7. Two rows of acrostichal setulae present ................................................... subgenus Parascaptomyza Duda - Number of acrostichal rows varies from four to six....................................................................................8 8. Wings with marks over crossveins and at apices of R and M veins. Hawai‘i, Moloka‘i, O‘ahu, Kaua‘i .... ..................................................................................................................................... S. parva (Grimshaw) - Wings completely hyaline........................................................................................................................... 9 9. Head broader than thorax ................................................................... subgenus Alloscaptomyza Hackman - Head not broader than thorax. Hawai‘i........................................................................ S. taractica (Hardy) 10. Shining black species, thorax and abdomen polished black; two or three ventral rays present on arista; ocellar triangle large, extending to level of proclinate setae; acrostichal setulae present in four rows; clump of black setae on hind trochanter....................................................... subgenus Bunostoma Malloch - Mesonotum brown (black in S. totonigra ), sometimes with longitudinal vittae; acrostichal setulae in six to eight rows; ocellar triangle not enlarged; hind trochanter lacking distinctive black setae........................11 11. Second antennal segment sharply pointed apically, extending over base of third segment; wings distinctly infuscated around veins and margins, central portions of cells mostly hyaline ............................................ ........................................................................................................... subgenus Grimshawomyia Hardy , 22 - Second antennal segment not sharply pointed; wings hyaline or evenly smoky.......................................12 12. Tibiae yellow with two narrow brown bands, fainter on front tibia .............................................................. ..................................................................................................... subgenus Engiscaptomyza Kaneshiro , 17 - Tibiae all yellow, or brown with yellow apices.........................................................................................13 13. Palpi greatly enlarged, protruding beyond the oral margin. Kaua‘i ......................... S. magnipalpa (Hardy) - Palpi not enlarged, enclosed within the oral cavity when mouthparts retracted........................................14 14. Epandrium with a prominent anteroventral lobe, over half as high (dorsoventrally) as main portion of epandrium; surstyli long and broad, setulose over the concave medial surface (see Figs. 117c and 211c in Hardy, 1965 )..............................................................................................................................................15 - Epandrium lacking a prominent lobe; surstyli not broad and medially setulose; mesonotum brown to black; femora dark brown.........................................................................................................................16 15. Thorax entirely yellow; ventral lobe of epandrium broader at apex than at base. O‘ahu.............................. ......................................................................................................................................... S. vinnula (Hardy) - Mesonotum and anepisternum rufous, tinged with brown; ventral lobe of epandrium nearly parallel-sided, about as wide at apex as at base. O‘ahu ...................................................................... S. improcera (Hardy) 16. Tibiae all yellow. Moloka‘i .............................................................................................. S. prolixa (Hardy) - Tibiae brown except narrow bases and apices. Moloka‘i, O‘ahu................................ S. totonigra (Hardy)