Lygistorrhina fijiensis Evenhuis, 2008

Male. Head. Medial portion of occiput, vertex, and frons dark brown to black, clypeus and labrum shiny brown, remainder of head brown to pale brown; three ocelli, median ocellus slightly smaller than lateral ocelli; eyes large, globular, taking up much of head; proboscis length subequal to fore coxa and femur combined. Antennae unicolorous pale brown to yellow, scape and pedicel with short stiff hairs apically; flagellomeres with short stiff hairs on lateral and dorsal surfaces, short fine hairs on ventral surface, medial surface generally bare; first flagellomere cylindrical, length 2 times width, flagellomeres 2–13 squarish, length subequal to width, flagellomere 14 blunt cylindrical, length ca. 1.5 times width, tip rounded.
Thorax.  Brown throughout; mesoscutum with minute hairs anteriorly and dorsally; proepimeron with four setae; laterotergite with row of setae caudally; halter stem and knob white.
Legs. Coxae and fore and mid femora brown; fore coxa with row of 6–8 short stiff hairs anteriorly; mid coxa with transverse row of 4–5 stiff hairs apically; hind coxa with 2 short setae subapically; hind femur 1.5 times length of mid femur, swollen on apical half, greatest width subapically, hind femur yellow to yellowish brown with brown to dark brown on apical one-third; tibiae yellow basally, brown apically, setulae in regular rows; hind tibiae narrow basally, gradually becoming wider apically to apex where width subequal to femur; tibial spurs 1:2:2; spurs short on fore and mid tibiae, long on hind tibia, length of tibial spurs on hind leg ca. 1/4 length of hind basitarsus; tarsi brown, with typical setulae and hairs; fore and mid claws pale brown long, slender with basal tooth ca. one-third length of claw; hind claws black, short, thick, with rudimentary subbasal tooth.
Wing. Suffused pale yellowish brown throughout with contrasting brown pattern as follows: two transverse bands from costa to posterior margin of wing (darkest at costa): one at apical 1/5 of wing from end of vein R5 to anterior edge of vein M2; second from costa at about apical third posteriorly to anterior edge of vein M3+4. Brown spot also at apex of vein CuA1 and pale brown spot in apical one-third of anal cell. Sc incomplete. Basal portions of M1, M2 and M3+4 effaced, M1 slightly sinuous to wing margin.
Abdomen. Extremely long, thin; dark brown to black with yellow to white on posterior margins of segments II-VI; tergite I bare on anterolateral two-thirds, with short black hairs elsewhere; abdominal segments II-VII (tergites and sternites) with sparse short black hairs evenly distributed except bare on yellow to white areas.
Genitalia. Hypopygium brown with apical 2/3 of gonostyli pale yellow with brown apex. Gonocoxites with sparsely distributed stiff setae; gonostylus porpoise-head shaped apically, densely pilose on inner margin, with short, stiff hairs on outer apical surface; typical subbasal long seta present on inner margin; additional long seta present at about mid-length on inner margin. Tergite 9 with dense spikey, villa-like setation along caudal margin, strong setae sparsely distributed throughout dorsal surface.

Female. As in male except as follows: Head with eyes much smaller, spherical,  not globular; occiput and vertex much more prominent, predominantly black with pale brown along inner eye margins; occiput and vertex sparsely black setose. Abdomen thicker than male, all brown; tergites with yellow on anterolateral portion of segments III–VI; sternites with small yellow spots on apical portions of segments III–VI. Genitalia not dissected; cerci rounded apically, pale yellow.