12) Colocasiomyia xenalocasiae (Okada, 1980)

(Figs 4A, 6A, 9O, 10F–H, 11D,E, 15K, 26)

Drosophilella xenalocasiae Okada, 1980: 218.

Colocasiomyia xenalocasiae: Okada, 1988: 36.

Drosophilella colocasiae: Okada, 1975: 356 (nec Duda, 1924).

Diagnosis. A pair of processes on male abdominal sternite VI convergent (Fig. 9O).

Supplementary description. Supracervical setae 5–10 per side. Eye with stout, dense interfacetal setulae. Cibarial, medial sensilla approximately 3 per side; posterior sensillum 0–1 per side (Fig. 4A). Supralateral seta outside prementum 0–1 per side (Fig. 26A). Prescutellar acrostichal setae present; acrostichal setulae in 4 rows. Apical scutellar setae nearly equidistant from each other and from basal scutellar seta. Costal setae in middle row all apically blunt, heavy, peg-like (Fig. 6A). Mid tibia with approximately 3 apical, stout setae. Male abdominal sternites III and IV longer than wide, posteriorly slightly narrowing (Fig. 26B). Female abdominal sternites VI as wide as long, posteriorly dilated, medially notched on posterior margin (Fig. 26C). Epandrium pubescent except for anterior margin and anteroventral elongation, posteroventrally prominently extended, with approximately 1 seta on lateral portion and 11–12 setae on posteroventral portion of each side (Fig. 10F). Surstylus long, narrow plate with 3 recurved teeth apically and 1 minute seta subapically (Fig. 10H). Median piece of subepandrial sclerite medially and anteriorly bilobed into long lobes; lateral pieces long, narrow (Fig. 10G). Cercus pubescent except for anterior margin and ventral 1/3, with approximately 30 setae (Fig. 10F). Oviscapt about 8 times as long as wide, with 16–17 ovisensilla (Fig. 26D).

Specimens examined. Japan: 10♂, 10♀, Sembaru, Okinawa, Ryukyu, 29.iv.2007, ex Alocasia odora, M.J. Toda leg. (SEHU). China: 9♂, 11♀, Menglun, Xishuangbanna, Yunnan, 940 m a.s.l., 5.xii.2018, ex Colocasia esculenta, S. Ling leg.; 16♂, 24♀, ditto except for 5.xi.2018, ex Leucocasia gigantea (SEHU). Philippines: 3♂, 5♀, B. Santiago, Iriga, Luzon, 29.xi.2012, ex C. esculenta, P.J. Matthews, M. Medecilo & J.R. Castillo leg. (MPMP, SEHU).

Distribution. Ryukyu Is., Philippines * (Luzon), China (Taiwan, Guangdong, Guangxi, Yunnan), Vietnam. *

New record.