Acantholeria desertorum Czerny 1932

Acantholeria desertorum Czerny, 1932 (Figs. 20–30) Acantholeria desertorum Czerny, 1932. Transactions of the Zoological Institute, 37: 252. Diagnosis. Hind femur with 4 short strong ventral setae at base, without other special setae. Hind tibia normal, without obvious swelling. Redescription. Male: body length 6.4 mm, wing length 6.1 mm [Observation specimen, 1 male]. Male. Head (Figs. 20–23) brownish orange, frons dark orange and area adjacent to ocellar triangle dark reddish orange, ocellar triangle and occiput brown, with area behind posterior fronto-orbital setae dark brown, gena dark orange; eyes reddish brown. Head with gray pruinesence. Setulae and setae on head dark brown. Anterior pair of fronto-orbital setae thin and short, pointed outward; posterior pair broken. Antenna dark orange, first flagellomere round with brownish velvet, 0.20 times as long as head height; pedicel with one row of circle setae; arista pubescent, brownish, 6.0 times longer than first flagellomere, slightly thickened at base. Proboscis brownish yellow with one pair of vibrissae well developed and one row of well arranged setae on oral margin; setulae on proboscis brownish yellow. Palpus brownish yellow; subapical setae stronger than surrounding ones, with slightly long setae at middle. Thorax (Figs. 20–23) dark brown, mesonotum with grey pruinescence. Scutum without obvious stripe. Scutellum rounded with same color as scutum, gradually transitioned to light yellowish orange from middle to apex. Setulae and setae on thorax dark brown. Postpronotum with 1 well developed seta and 9 short setae; 1+3 dorsocentral setae, almost equal in length, with approximately five rows of acrostichal setae between them, central row neatly arranged and densely packed in straight line, while two irregular rows on both side; a pair of prescutellar setae present. Propleuron with 1 well developed proepisternal seta and 3 very weak proepimeral setae; katepisternum with 1 long seta and 6 very short and weak setae on upper edge; anepimeron and anepisternum bare. Scutellum with two pairs of scutellar setae. Wing (Fig. 24) nearly hyaline, slightly tinged yellowish; veins yellowish orange. Crossveins r-m and dm-m without obvious dark markings on membrane. Costal spines well developed. Calypter and alula nearly hyaline with pale setulae. Halter white with halter stem slightly tinged brownish white. Legs (Fig. 25) yellowish orange, except fore leg brownish yellow on outer and dorsal surfaces. Setulae and setae on legs dark brown. Fore femur with two irregular rows of antero-dorsal setae and one row of approximately 10 ventral setae; mid femur with 3 neatly arranged subapical anterior setae; hind femur with 3 subapical antero-dorsal setae and 4 short strong ventral setae at base, without other special setae. Fore tibia with 1 thin preapical dorsal seta; mid tibia with 1 well developed apical anterior seta and a circle of very robust apical setae (except posterior surface); hind tibia normal, without obvious swelling, with 1 thin preapical dorsal seta. Tarsomere 4 of all legs slightly shorter than tarsomere 3 and 5. Abdomen almost dark brown on tergites 2–5 and brownish orange on sternites 2–5, but terminalia yellowish orange. Setulae and setae on abdomen dark brown. Tergite 6 small. Male genitalia (Figs. 26–30): Epandrium yellowish orange, with sparse dark brown setae. Hypandrium symmetrical. Editum absent. Surstylus trapezoidal with rounded apex. Cerci symmetrical, curved downward, apically rounded, with slightly swollen apex. Female. Unknown. Observed material. 1 ♂, China, Inner Mongolia, Hohhot, Daqingshan Mountain [40°54'34.76"N, 111°12'49.30"E], 1921 m, 2020. VII. 15, Xiaodong Cai (CAU). Distribution. China (Inner Mongolia); Mongolia; Russia.