Trypetisoma ( Trypaneoides ) xii, Li & Qi & Yang, 2019

Trypetisoma ( Trypaneoides) xii sp. nov.

( Figs. 71–80 View FIGURES 71–75 View FIGURES 76–80 )

Diagnosis. Parafacial with 1 elliptic brown spot on apical inner margin. Wing ( Fig. 72 View FIGURES 71–75 ) with hyaline spots forming 2 hyaline bands along r-m and R 2+3 extending to posterior margin. Male genitalia ( Figs. 76–80 View FIGURES 76–80 ): aedeagus slender, consist of 1 thin V-shaped ventral sclerite and a pair of slender ventral sclerites.

Description. MALE. Body length 2.0 mm, wing length 2.5 mm. FEMALE. Unknown.

Head ( Fig. 71 View FIGURES 71–75 ) pale yellow. Face yellow except brown on lateral margin and ventral margin, with 1 brown concave near ventral margin; parafacial with 1 elliptic brown spot on apical inner margin. Frons brownish yellow, with grayish white pruinescence, wider than long, trapeziform, anterior margin narrower than the posterior, with a pair of narrow brown median bands extending to ocellar triangle; ocellar triangle blackish gray, oc developed, longer than anterior or; anterior or longer than half length of posterior or; oc each with 1 blackish brown basal spot. Gena about 1/5 eye height. Occiput with gray pruinescence. Antenna brownish yellow; 1 st flagellomere yellow basally, nearly 1.4 times longer than high; arista brown except yellow basally, pubescent. 1 brown triangular spot present between antenna and eye. Proboscis pale yellow, with yellow and black hairs; palpus brown with black hairs.

Thorax ( Fig. 74 View FIGURES 71–75 ) brown. Mesonotum with 1 brown median band extending from anterior margin to anterior of 3st post-sutural dc, postpronotum with posterior margin surrounded by 1 thin brown band; 1+3 dc, 1st post-sutural dc near transverse scutal suture, presutural dc closer to anterior margin than presutural acr; 1+3 acr, in 3 rows; without prescutellar acr; dc and acr each with 1 brown basal spot. Anepisternum with 3 anpest (the strongest one near posterior margin) and 3–4 short hairs; 2 kepst. Leg yellow, femora brown except pale yellow at apex, apical tarsi brown. Fore femur with 6 pd, 3 pv; fore tibia with 1 long dp, 1 short apv. Mid femur with 5 a, 1 app; mid tibia with 1 strong dp, 1 apv. Hind femur with 2 apv on apical half, 1 preapical ad; hind tibia with 1 dp, 1 short apv. Wing ( Fig. 72 View FIGURES 71–75 ) with anterior margin brown, along posterior margin grayish white gradually, with circular or irregular hyaline spots, hyaline spots forming 2 hyaline bands along r-m and R 2+3 extending to posterior margin, 1 brown band along dm-cu extending from anterior margin to posterior margin between the two hyaline bands, the brown band with 2 hyaline spots on r 1 cell and with 2 thin hyaline spots on both sides of dm-cu, hyaline apical spots present between R 4+5 and M 1+2; subcostal cell brown; costa with 2nd, 3rd and 4th sections in proportion of 7.5: 2.7: 1.8; r-m beind middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 6.0: 2.4; ultimate section of CuA 1 about 1/5 of penultimate section. Halter pale yellow except knob black brown.

Abdomen ( Fig. 75 View FIGURES 71–75 ) brown, except tergites 5–6 and posterior of tergite 4 blackish brown. Tergites 2–6 each with 4–5 pairs of posterior margin setae. Male genitalia ( Figs. 76–80 View FIGURES 76–80 ): syntergosternite narrow in anterior view. Epandrium broad apically but narrow basally, ventral apical angle with setae. Without surstylus. Hypandrium U-shaped without inner process. Gonopod tubiform, strong apically, with 4–5 long hairs on apical half. Aedeagus slender, consist of 1 thin V-shaped ventral sclerite and a pair of slender ventral sclerites, without distinct apical concave. Aedeagal apodeme tubiform, nearly as long as 1/4 length of aedeagus.

Type material. Holotype ( HAUST): 1 ♂, CHINA, Guangxi: Fangchenggang City, Fulong Town , 2012. V. 16, Yuqiang Xi.

Distribution. China ( Guangxi).

Remarks. The new species is very similar to Trypetisoma ( Trypaneoides) fenestrata (de Meijere, 1910) from the Oriental region and the Palaearctic region in body color and band, but the latter r 1 cell with 3 hyaline spots; abdomen blackish brown; syntergosternite incomplete circular, breakage connected by membrane, epandrium slender. The new species r 1 cell with 4 hyaline spots; abdomen brown except blackish brown on tergites 5–6 and anterior of tergite 4; syntergosternite circular; epandrium wide apically and broad basally.

Etymology. Latin, xii , referring to Yuqiang Xi who is the new species type specimen’s gatherer.