A NEW GENUS AND THREE NEW SPECIES OF ACANTHONEVRIN1 FROM CHINA (DIPTERA: TEPHRITIDAE)

In this paper a new genus and three new species of the tribe Acanthonevrini are described. All the type specimens are kept in the Institute of Zoology, Academia Sinica.Cyaforma gen. nov.Type-species: Cyaforma shenonica sp. nov.Middle size with numerous small, black hairs. Front flat and nearly parallel sided, wider than eye width, with some fine black hairs on anterior half part. Face subequal in length to front, mesofacial plate strongly convex at middle not reflexed at lower part above epistom. Antennae short, about half of the face height; arista pubescent but not plumose. Thorax about 2 × longer than width. Wing long and narrow, about 3 × longer than width; stigma 1/2 as long as cell C2; the 4th costal section twice as long as 5th section; vein r2±3,r4+5 straight and the latter with setulae extending almost its enure length; r-m crossvein situated distinctly beyond middle of cell 1M2; lobe of cell Cu very short. The ventral surface of front femur with 4 strong black bristles; the middle with 2 apical spurs. The basal segment of ovipositor triangular, rather thick and a little longer than total length of terga 5 + 6.Chaetotaxy well developed: two pairs inferior fronto-orbitals incurved, two pairs superior fronto-orbitals reclinate; ocellars longer than fronto-orbitals; postocellars weak, seta-like; outer and inner verticals, genal and postvertical bristles appear a single pair; three pairs of scutel-lars, the apical pair comparatively short, crossed; three pairs of supraalar bristles; a pair of scapulars, presuturals, dorsocentrals, prescutellars, propleurals, pteropleurals and sternopleurals; two pairs of humerals and notopleurals; mesopleurals usually 1, sometimes 2; dorsocentrals situated before the level of supraalars.Allied to Ortalotrypera Hendel, but distinguished by having only 1 pair of anterior supraalars; the 4th costal section twice as long as 5th section. Also similar to Hexaptilona Hering and Phorelliosoma Hendel, but the former with mesofacial plate concave, arista plumose and 3 mesopleurals; the latter with ocellars rather weak, distinctly shorter than fronto-orbitals; only 1 strong apical spur on middle tibia; and it is also differentiated from both of them by ovipositor and markings of wing.Cyaforma shenonica sp. nov. (fig. 1)Body shining black. Head approximately pale brown yellow or yellow except for ocellar triangle black, front and 3rd antennal segment orange red. Thorax almost shining black; sternopleura, hypopleura and metapleura yellow; mesonotum with two brown yellow or brown red vittae extending from anterior margin to transversal suture or even further. Wing black in ground colour with following hyaline or lacte areas: alula, a spot of cell 2M2 and a stripe along the hind margin. Leg yellow. Abdominal terga entirely shining black and sterna brown yellow. Male genitalia as in fig. 1-d. The basal segment of ovipositor black, opened in dorsal surface at apex; inversion membrane with a tuft of barbulae; the piercer flatted and broad, curved upward, sharp-pointed at apex.Length: body 6.5-6.8 mm; wing 7.0-7.8 mm.Holotype ♂, allotype ♀, Shennongjia (31°24'N, 110°24'E), Hubei Province, 27. Ⅶ. 1977, collected by Zheng Le-yi and Zou Huan-guang; paratypcs 1♂ 1♀, same as above; 9♂♂, 8♀♀, Mt. Emei (29°30'N, 103°18'E), 1860-1780 m, Sichuan Province, 9-28. Ⅵ-Ⅶ. 1957, collected by Zheng Le-yi and Cheng Han-hua.Ortalotrypeta tibeta sp. nov. (fig. 2)Resembles to 0. gansuica Zia and is differentiated by having apical blackish brown marks of wing linking up with a wide blackish brown band along crossvein m-cu, rather than both segregated; an elliptical lacte spot at apex of cell R5; cell Cu not darkened.Length: body 10mm; wing 10.2mm.Holotype ♀, Yigong (30°N, 96°30'E), Xizang Province, 2300 m, 29. Ⅶ. 1978, collected by Li Fa-sheng.Ortalotrypeta singula sp. nov. (fig. 3)This new species is readily differentiated from other known species by having 1 humeral and propleural bristles; apical 2/3 of cell R1 brown black; 5 small milk-white spots drawn in apical half of wing and arranged as follo