Goifa Dworakowska

Goifa Dworakowska, 1977: 18 . Type species. Goifa fasciata Dworakowska, 1977, by original designation.

Redescription. Small, ivory, light testaceous to lemon yellow empoascines. Head narrower and longer than pronotum (Fig. 15). Vertex in dorsal view nearly equal to or longer than width between eyes, anterior margin produced medially (Fig. 15), profile of vertex transition curved evenly into convex and distinctly elongated face (Figs 16, 17), coronal suture long and distinct (Fig. 15), lateral frontal suture present (Fig. 17). Eyes very large (Figs 15–17). Forewing narrow, 3 apical veins arise from longitudinal m cell, 3rd apical cell petiolate, 2nd apical cell broadened apically, r cell reduced in size, c and r cells narrower than m and cua cells (Fig. 18); hindwing with area bordered by vannal veins small, vein CuA unbranched apically (Fig. 19).

Abdodminal tergal apodemes well developed with tips widely divergent posteriorly (Fig. 29). Male pygofer elongate, strongly narrowing caudad, with rigid microsetae at apex of lobe, dorsal margin produced with lobe usually adorned with one dorsal macroseta at base, ventral appendage absent (Figs 20, 22); dorsal bridge quite long (Fig. 21). Subgenital plate much exceeding pygofer side, slim, caudal half gradually narrowing to rounded apex, ventral margin almost straight or slightly sinuate, setae in basal group not identifiable, marginal row of microsetae short and laterally with one row of thick setae on disc followed by one normal thick macrosetae at apex of plate, with additional row of gracile microsetae near ventral margin (Figs 23, 24). Paramere serrate apically, with setae and sensory pits basad of serrations, or bifurcated apically with long fine setae near base (Figs 27, 28). Connective fused with base of aedeagus (Figs 25, 26). Aedeagus with large preatrium, dorsal apodeme absent, shaft tubular, with paired processes or not, gonopore subapical (Figs 25, 26). Anal tube process simple, tapered (Fig. 20).

Remarks. Goifa was established by Dworakowska (1977) with G. fasciata as the type species from Vietnam. Dworakowska (1980) and Mann & Sohi (1988, 1993) added three more species thereafter ( G. rotundata Dworakowska 1980, G. forcipita Mann & Sohi 1988, G. aprocessa Mann & Sohi 1993). Thus, four species of the genus have been reported to date, all distributed in the Oriental Region. In this paper, we report the genus for the first time from China, transfer Paolia tangailensis Ahmed & Samad (1972) from Paolia Lower (1952) (=Dialecticoteryx Kirkaldy 1907) to Goifa as a new combination and synonymize G. aprocessa Mann & Sohi (1993) with G. tangailensis (Ahmed & Samad, 1972) .

In the Usharia group, Goifa is related to Dayus and Baguoidea by the forewing with 3 apical veins which all arise from the longitudinal m cell, sternal abdominal apodemes with tips widely divergent posteriorly, the connective fused with the base of the aedeagus and the hindwing with CuA unbranched. However, it differs from both genera in having the head narrower and longer than pronotum, the r cell in the forewing reduced in size, the ventral pygofer appendage absent, and the subgenital plate lacking setae in the basal group but with fine microsetae laterally on the disc and a row of gracile microsetae near the ventral margin.

Included taxa: G. fasciata Dworakowska (1977), G. rotundata Dworakowska (1980), G. forcipita Mann & Sohi (1988) and G. tangailensis (Ahmed & Samad, 1972), n. comb.

Distribution. China (Yunnan and Hainan Provinces), Vietnam, Pakistan, India.