Hilara hasankoci, Çiftçi, Mustafa Cemal & Hasbenli, Abdullah, 2011

Çiftçi, Mustafa Cemal & Hasbenli, Abdullah, 2011, Two new species of Hilara (Diptera, Empididae) from northwestern Turkey, Zootaxa 2928, pp. 49-56 : 52-54

Hilara hasankoci sp. nov.

( Figs. 6–10 )

Diagnosis. Large species, body about 5.7–6.3 mm long. Antenna and palpus black. Legs long and strong, mostly blackish brown except for trochanters and “knees” (tip of femora and base of tibiae) largely yellow. Fore basitarsus ( Fig. 6 ) cylindrical, not stouter than tip of tibia and narrower at tip. Haltere yellow with darkened stem. Labrum as long as height of head.

Description. Male. Face and frons not much wider than normal, face with grey pruinescense, frons dull black except for lower part of frons above antenna with grey dusting. Occiput slightly grey dusted in lateral view, dull black in dorsal view and slightly brownish dusted in posterior view. Pair of ocellar and frontal bristles long, frontal pair shorter than ocellar bristles and longer than 3rd antennal segment (postpedicel) without stylus. Occipital bristles black, as long as stylus, bristles below neck longer and thinner. Antenna black, stylus thick and as long as 3rd antennal segment (postpedicel). Palpus black, slightly light grey dusted, ventrally with long black hairs and preapical bristle long, as long as 3rd antennal segment with stylus, preapical bristle with 3 thinner bristly hairs nearly as long as preapical bristle, 1 in front, 2 behind. Labrum shiny black, nearly as long as height of head.

Thorax black, densely grey dusted. Junction of pleural sclerites and postalar calli translucent yellowish. Scutum with 3 black stripes on lines of bristles in anterior view, viewed from above grey dusting becomes indistinct, scutum darkened with 2 lighter black stripes appearing slightly between acrostichal and dorsocentral bristles. 3 stripes and grey dusting very clear with 2 additional stripes appearing at sides of scutum in posterior view. Thoracic bristles and hairs black. Acrostichals regularly bi-serial, dorsocentral bristles uni-serial, all hair-like and dorsocentral bristles longer than acrostichal bristles. Dorsocentral bristles elongate posteriorly and ending with 3 pairs of long prescutellar bristles. Large marginal bristles long: 1 humeral, small and fine 1 intrahumeral, 1 posthumeral, 3 notopleurals, 2 supra-alars, 1 postalar and 3 pairs of scutellars (outer pair small). Humeri (postpronotum) and notopleural depression anteriorly with short hairs, also between humeral, intrahumeral, posthumeral and supra-alar bristles with short and fine hairs. Pronotum (prothoracic collar) with black bristle on each side between them with row of small black hairs. Proepisternum with long black hairs as long as pronotal bristles, prosternum with very short brownish hairs.

Wings brown with distinct blackish brown veins and wing tip very darkened. Anal vein only distinct at base. Stigma dark brown, indistinct due to darkened wing tip. 3 long costal bristles, first costal bristle shorter and finer than others. Radial fork (R4+5) long with open tip. Squamae yellow with dark grey margin and fringes pale. Haltere yellow with brownish stem.

Legs blackish brown, slightly grey dusted; trochanters, tip of femora and base of tibiae largely yellow. Coxae densely greyish dusted, fore coxa same coloration with pleura. All hairs and bristles black, all tibiae and tarsal segments ventrally with dense, pale pubescence. Fore femur ( Fig. 6 ) on apical half ventrally and posteroventrally with short bristles. Mid femur with anterior bristles, 2 at base, 1 at tip, also on apical half anteroventrally and posteroventrally with short bristles. Hind femur anteroventrally with row of bristles, posteroventrally on apical half with few bristles and anteriorly with preapical bristle. All tibiae dorsally with row of bristles slightly longer than width of tibiae and preapical circlet of bristles distinct. Fore tibia ( Fig. 6 ) slightly thickened towards tip. Hind tibia anteroventrally on apical half with 3 short bristles. Tarsal segments with fine short hairs, dorsal hairs slightly longer than ventral hairs. Fore basitarsus cylindrical ( Fig. 6 ), slightly thickened, not stouter than tibia and nearly half length of fore tibia.

Abdomen blackish brown with slightly brownish grey dusting, more distinct on terminal segments. Abdominal hairs long and black on terga, very short and pale on sterna. Hairs on basal segments longer, tergum 2 at sides with long dense hairs. Hind marginal bristles distinct and very long. Sternum 8 with long black hairs and hind marginal bristles long and fine ( Fig. 7 ). Genitalia ( Figs. 8–10 ) large, darker colored than abdomen. Hypandrium with short black hairs, postgonite unusually amorphous and multi-furcated. Lateral lamella (epandrial lamella) large with black hairs and finger-like apical process.

Holotype male body length: 5.8 mm, wing length: 6.9 mm. Paratypes body length: male 5.7–6.3 mm; female 6–6.5 mm, wing length: male 6.5–7 mm; female 6.8–7.3 mm.

Female. General appearance as in male. All hairs and bristles shorter than in male. Ocellar and frontal bristles short, palpus with only 1 preapical bristle, other long bristles (as in male) short and fine as other hairs on palpus. Wing and haltere darker colored, in some specimens haltere almost black. Legs more densely grey dusted, fore basitarsus simple; hind tibia slender and simple. Abdominal hairs on anterior segments long, becoming very short towards tip, hind marginal bristles absent.

Remarks. On the basis of large and strongly bristled body, long bristly haired proepisternum and long bristled palpus, H. hasankoci is assigned to the Hilara interstincta -group. The bi-serial acrostichal bristles and yellow halteres (some female specimens with darkened almost black halteres) is similar to H. cantabrica Strobl , but the larger body, slightly thickened fore basitarsus and simple tip of hypandrium clearly differentiates H. hasankoci from the former species. The structure of the forelegs and ventrally short bristled femora suggests that H. hasankoci is also similar to H. interstincta (Fallén) and H. lugubris (Zetterstedt) . However, H. interstincta has completely black legs and smaller body size. Hilara lugubris has trochanters, tip of femora and base of tibiae yellow as in H. hasankoci , but the haltere is black and apical process of lateral lamella (epandrial lamella) shorter. The unusually amorphous multi-furcated postgonite separates H. hasankoci from H. lugubris .

Type material. HOLOTYPE ♂ (spn10393), Çanakkale, Yenice, Kalkım village, Kaz Mountains, 630 m, 16.v.2009, leg H. Koç. PARATYPES (spn10394-spn10407): TURKEY. Çanakkale: 2 ♂, 10 ♀, Yenice, Kalkım village, Kaz Mountains, 630 m, 16.v.2009, H. Koç; İ stanbul: 1 ♂, 1 ♀, Şile, Osmanköy, 45 m, 18.v.2010, M. Çiftçi & H. Koç. All specimens are deposited in the Zoological Museum of Gazi University ( ZMGU).

Derivatio nominis. The species is named after the collector of the type specimens and Turkish dipterist, Dr. Hasan Koç.

Figures

FIGURES 6 – 10. Hilara hasankoci 6. Fore leg in posterior view; 7. Postabdomen; 8. Hypandrium; 9. Lateral lamella (epandrial lamella) in lateral view; 10. Tip of hypandrium in dorsal view. Scale = 0.3 mm.