Titanochaeta Steganinae Drosophila Scaptomyza ( Ashburner, 1981 ) Scaptomyza Tantalia Bunostoma Drosophila Scaptomyza D. vinnula Scaptomyza Alloscaptomyza Celidosoma Engiscaptomyza Grimshawomyia Rosenwaldia A review of the endemic Hawaiian Drosophilidae and their host plants Magnacca, Karl N. Foote, David O’Grady, Patrick M. Zootaxa 2008 1728 1 58 8VTXW 7298 [222,365,1751,1777] Insecta Drosophilidae Scaptomyza Animalia Diptera 27 28 Arthropoda genus    Titanochaetahas taken an unusual path as a predator of spider egg sacs. The pointed, sclerotized ovipositor they use to pierce the sac is characteristic of the group. Although a fair number of them have been reared, including 6 of the 11 species, little is known of their habits and they are uncommon in collections. Predation is also found in other drosophilid groups, especially the Steganinae, but rarely in  Drosophilaor  Scaptomyza( Ashburner, 1981), although the Pisona–breeding Elmomyzaare also predators. The only other  Scaptomyzasubgenus with a moderate number of rearing records is  Tantalia, which breed largely on leaves but do not appear to be host-specific, even within a species.  Bunostomahas too few rearing records to draw even preliminary conclusions, and only one of the 8 unplaced species originally described as  Drosophilabut probably belonging to  Scaptomyza(  D. vinnula) has been reared. The other Hawaiian  Scaptomyzasubgenera –  Alloscaptomyza,  Celidosoma,  Engiscaptomyza,  Grimshawomyia, and  Rosenwaldia– lack any data at all.