Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 94. (Budapest 2002)

Papp, L.: Lygistorrhinidae (Diptera) from Taiwan

Legs dirty yellow. Apical 2/5 of mid and hind femur dark brown. Coxae and trochanters dark brown. Tibial setulae in well-ordered rows. Tibial spurs 1:2:2, mid tibial spurs subequal. Fore claws 0.7 mm long, thin, sharp, curved arched with a ca. 0.025 mm long ventrobasal second apex. Wing light brownish with brown veins. Sc rather strong, ends free. R, reaching near middle of wing, R5 joins C far from apex of wing, costal vein distinct and abruptly ends at 3/4 of the section between R5 and M

1. M

1-M2 fork nearly complete, their stalk present as colourless fold only. M3+4 (cf. KRZEMINSKI & EVENHUIS 2000). distinct even below section of R,. Cu, not reaching wing margin, apical part perpendicular to alar margin. Cu

2 straight, distinct almost to the curved part of Cu,. A, almost parallel to hind margin of wing, short, shorter than down-curved section of Cu,. Wing patterned, 4 brown spots as follow: 1) apical 3-shaped spot from below the apex of R

5 leaving the subcostal area light, continued narrowed to M,, forming a wide band along M,, continued in m, cell more proximally than its R

5 part and terminating below M

2

, leaving m, apical part light. 2) Second spot covers m 1 at the area of the M,, M

2 bases, continued in m, somewhat lower than M

3+4 and follows M,

+4 widely to the wing apex, main part in m

2

. 3) Third spot along Cu-s and widens on the down-curved part of Cu,. 4) Fourth spot present as a round one in Cu cell (at about the middle). Halter 0.53 mm long, pale yellow. Gonostylus yellow, contrasting gonocoxites. Gonostylus (Figs 2-3) with a subapical medial blunt, more or less globular tooth, lacking in a number of Lygistorrhina species, large and pointed in L. carayoni MATILE, 1986. Caudally to this took a thicker short black thorn present. Tergite 9 club-shaped with rounded basal and caudal edges, caudal apex with dense short black thornlets, like in carayoni. Tergite 9 dorsally with long setae, 2 pairs of them in apical quarter rather long. Sternite 8 short liguliform. Phallus short and hidden, as in its congeners. Tergite 9 completely covers the short pale cerci, which bear some minute black thornlets apically. Figs 2-3. Lygistorrhina chaoi sp. n., S genitalia in situ. 2 = dorsal view, 3 = ventral view. Scale: 0.2 mm