Lygistorrhina (Probolaeus) mitarakensis n. sp. (Figs 1C, 2C, 3E, F, 4E, F, Table 1) urn:lsid:zoobank.org:act: 20F21808-86A0-4AB8-A10A-75050FD763C9 TYPE MATERIAL. — Holotype. French Guiana • ♂; Mitaraka, different sites nr base camp and along trails; tropical most forest (different sites); 14.III.2015; Julien Touroult & Eddy Poirier leg.; SLAM; MITARAKA/191; mounted in Euparal on slide; MNHN-ED-ED10691; MNHN. Paratypes. French Guiana • 26 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 14.III.2015; Julien Touroult & Eddy Poirier leg.; SLAM; MITARAKA/191; in alcohol; MNHN-ED-ED10694 mounted in DMHF on slide;MNHN-ED-ED10691, ED10692, ED10693, ED10694, ED10695, ED10696, ED10697, ED10698, ED10699, ED10700, ED10701, ED10702, ED10703, ED10704, ED10705, ED10706, ED10707, ED10708, ED10709, ED10710, ED10711, ED10712, ED10713, ED10714, ED10715, ED10716, ED10722; MNHN • 1 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 1-6.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/195; in alcohol; MNHN-ED-ED10717; MNHN • 1 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 25.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/190; in alcohol;MNHN-ED-ED10718; MNHN • 2 ♂; MIT-DZ2 (tropical moist forest, plateau-slope); 02°14’02.6”N, 54°27’01.7”W; 296 m; 20-25.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/206; in alcohol; MNHN-ED-ED10719, MNHN-ED-ED10721; MNHN • 1♂; MIT-DZ1 (tropical moist forest, plateau-slope); 02°14’01.4”N, 54°27’00.2”W; 304 m; 1-8.III.2015; SLAM; leg. Marc Pollet; MITARAKA/169; in alcohol; MNHN-ED-ED10720; MNHN • 2♂; MIT-DZ2 (tropical moist forest, plateau-slope); 02°14’02.6”N, 54°27’01.7”W; 296 m; 1-8.III.2015; SLAM; leg. Marc Pollet; MITARAKA/173; in alcohol; NMS-10003798, NMS-10003799; NMS • 1 ♂; MIT-E-savane roche 2 (open/partially opened areas); 02°13’59.8”N, 54°27’46.5”W; 471 m; 13-20.VIII.2015; MT(6 m); leg. Pierre-Henri Dalens; MITARAKA/230; in alcohol; NMS-10003800; NMS • 3 ♂; different sites nr base camp and along trails; tropical moist forest (different sites); 14.III.2015; SLAM; Julien Touroult & Eddy Poirier leg.; MITARAKA/191; in alcohol; NMS-10003801-NMS-10003803; NMS. DIAGNOSIS. — Antenna entirely yellow, flagellomeres each with one prominent dorsal seta. Wing hyaline; Sc ends at C. Thorax, mid and hind coxa brown; fore coxa yellow. Abdominal segment 1 completely pale-yellow; segments 2-5 with a pale-yellow posterior band; gonostyli of subequal width along their entire course; aedeagus membranous. ETYMOLOGY. — The species epithet refers to the type locality. DESCRIPTION Male General coloration. Dark brown (Fig. 1C). Measurements. See Table 1. Head. Rounded, dichoptic. Eyes appear larger than head height, with vertex appearing slightly depressed. Rounded ommatidia with similar diameter, interocular setae subequal in length to ommatidial diameter.Three ocelli arranged almost on a straight line, semi-circular, with median ocellus 1/3× the size of lateral ocelli. Antenna yellow, strongly tapering, shorter than hind femur, with length 0.8-0.9 mm; 14 flagellomeres, each with one strong dorsal seta, subcylindrical, gradually tapering; flagellomeres 1-9 1.5-2× as long as wide, flagellomeres 10-14 2-4× as long as wide. Face longer than wide. Clypeus with rounded apex, setose.Palpus length 1.2 mm, tapering towards apex, with a simple row of very long setae (at least 5× as long as palpus width). Hypopharynx length 1.5mm; labellum slightly longer. Thorax. Thorax completely brown. Scutum irregularly setose. Scutellum rounded, with 6 posterior setae. Antepronotum and proepisternum with 4-5 setae each. Laterotergite lobed, with one row of 14-20 setae. Hind coxa slightly longer than both metepimeron and laterotergite. Legs. Fore coxa pale-yellow; mid and hind coxa completely dark brown. Remainder of fore and mid legs yellow; hind femur pale-yellow basally, dark brown in distal 1/3; hind tibia brown in distal 1/4; hind tarsus entirely brown. Tibiae irregularly setose. Dorsal setae of hind tibia longer than tibial width. Fore basitarsus 1 shorter than fore tibia. Claws of fore and mid leg curved, apically blunt, with a small incision at apex; claw of hind legs setiform, straight and pointed. Wing (Fig. 1C). Membrane hyaline, densely covered with microtrichia.Sc relatively long, ending on C; R 1 slightly proximad the level of CuA tip; C extending to half the distance between tips of R 5 and M 1; C, R 1 and R 5 with dark setae, rest of the veins bare; M 1 longer than M 2 and M 3+4, latter subequal in length. M 1 and M 2 almost straight; M 3+4 curved anteriorly and slightly sinuous; CuA curved posteriorly, sometimes inconspicuously sinusoid. Anal lobe well developed. Halter yellow, with the same length as first abdominal segment. Abdomen. Mainly dark brown. Segment 1 completely pale; segments 2-5 with pale-yellow posterior band, occupying 20-30% of segment length; segments 6 and 7 and terminalia dark brown (sometimes sternite 6 with inconspicuous pale apical spot). Terminalia (Figs 3E, F; 4E, F). Tergite 9 rounded at base, somewhat triangular at tip, with very long setae near apex (longer than on remainder of tergite) and a patch of sparse short setae at tip. Sternite 9 with rectangular base wider than long and square extension caudally. Gonostyli of equal width, with very dense apical and medioventral patch of setae at tip; apical tooth scoop-shaped. Aedeagal complex membranous, bell-shaped with short parallel-sided apex; gonocoxal apodemes heavily sclerotised distally; aedeagal apodeme sinusoidally curved. COMPARISON The new species is most similar to L. singularis (Williston, 1896) but differs by (character status in L. singularis given in brackets): flagellomeres longer (0.7-1.3× as long as wide); Costa shorter, not extending half the distance between R 5 and M 1 (extending); M 3+4 curved anteriorly (posteriorly); fore basitarsus shorter than fore tibia (longer); abdominal segment 5 with pale apical band (completely brown).

Published as part of Blagoderov, Vladimir & Pollet, Marc, 2020, Diversity of Lygistorrhina (Probolaeus) Williston, 1896 (Diptera: Keroplatidae, Lygistorrhininae) of Mitaraka (French Guiana), with descriptions of three new species, pp. 593-606 in Zoosystema 42 (30) on pages 598-600, DOI: 10.5252/zoosystema2020v42a30, http://zenodo.org/record/4321222