Hormius minialatus Tobias

Belokobylskij, Sergey A. & Kula, Robert R., 2012, Review of the brachypterous, micropterous, and apterous Braconidae of the cyclostome lineage (Hymenoptera: Ichneumonoidea) from the Palearctic Region 3240, Zootaxa 3240 (1), pp. 1-62 : 30-32

Hormius minialatus Tobias

( Figs 56–66 , 121 )

Hormius minialatus Tobias, 1977: 473 [original description].

Examined material. Austria: 1 female, “ Ebelsb [er]g, Schiltenb [er]g, Autob. Dst. Mönchsgr., 22.7.[19]49, leg. Hamann ” ( NHMW) . Finland: 1 female, “ Vammeljoki ”, “Hellen”, “3113” ( DABH) . Mongolia: 2 females (holotype and paratype), “ Mongolia , Vostochnyi [East] aymak, 60 km VSV [ENE] Bayan-Burda, g.[ora] Daerkhin-Tsagan-Obo, 3. VIII.[1]976, Kerzhner” ( ZISP) . Russia: 1 female, Chita Province , Onon District, Nizhniy Tsasuchey, pine forest, 24.VII.1990 (A. Kotenko) ( IZANU) ; 2 females (with longer wing), Chita Province , Kharanor, 9 VII 1963 (A. Emelyanov) ( ZISP) .

Description. Female. Body length 1.90–2.40 mm.

Head (dorsal view) 1.50–1.70 times as wide as median length, 1.30–1.60 times as wide as mesosoma at level of tegulae. Head behind eyes more or less distinctly roundly narrowed. Transverse diameter of eye 1.40–1.60 times longer than temple (dorsal view). Ocelli medium-sized, in triangle with base 1.10–1.25 times sides. POL 1.50–2.00 times Od, 0.40–0.50 times OOL. Antennal socket diameter 1.00–1.50 times distance between sockets, 1.50–2.00 times distance between socket and eye. Eye with short and sparse setae, with shallow emargination opposite antennal socket, 1.15–1.25 times as high as broad. Malar space 0.40–0.50 times as high as eye, 1.00–1.20 times as high as basal width of mandible. Malar suture very shallow. Face and clypeus distinctly convex, width of face 1.15–1.25 times eye height and 1.20–1.30 times height of face and clypeus combined. Hypoclypeal depression round, width 0.85–1.00 times distance from depression to eye, 0.40–0.45 times width of face. Occipital carina complete dorsally, weakly arched to ocelli medio-dorsally, joined ventrally with hypostomal carina above base of mandible. Hypostomal flange rather narrow. Head below eyes distinctly and weakly roundly narrowed (frontal view).

Antenna thick, filiform, with 14–16 flagellomeres, 0.75–0.85 times as long as body. Scape rather short and thick, 1.40–1.70 times longer than width, 1.30–1.50 times longer than pedicel. First flagellomere 2.00–2.50 times longer than apical width, 1.00–1.10 times as long as second flagellomere; second flagellomere 2.00–2.20 times longer than width. Penultimate flagellomere 1.80–2.20 times longer than wide, 0.70–0.90 times as long as first flagellomere, 0.85–0.90 times as long as apical flagellomere; the latter weakly pointed apically and without spine.

Mesosoma more or less reduced, length 1.70–1.90 times height. Pronotum rather long, convex dorsally, anterior margin weakly concave (dorsal view), pronotal keel almost absent. Mesoscutum distinctly and roundly elevated above pronotum, 0.70–0.85 times as long as wide. Notauli distinct, rather deep, more or less wide, complete, sparsely crenulate with granulation; fine or very fine median furrow sometimes present on median lobe. Prescutellar depression relatively deep, long, with single high median carina and often several lateral rugae, finely rugulose between rugae. Scutellum separated, with distinct lateral carinae. Subalar depression relatively deep, wide, granulate-strigate. Precoxal suture present, distinct, crenulate, running along anterior 0.50–0.60 of lower part of mesopleuron. Prepectal carina distinct. Postpectal carina absent. Metapleural lower lobe short, more or less wide, rounded apically. Propodeum regularly convex-roundly narrowed posteriorly (lateral view), without lateral tubercles, but with rather distinct postero-lateral carinae. In dorsal view, mesonotum 4.30–5.50 times longer than pronotum, 2.10–2.50 times longer than propodeum. Tegulae present.

Wings. Size of wings more or less distinctly reduced, wings narrow, pointed or sometimes subrounded apically, with distinct venation in basal part, without sclerotized areas, protruding behind apex of propodeum, sometimes reaching apex of first tergum or (rarely) middle of metasoma.

Legs. Femora more or less slender. Hind femur 4.00–4.70 times longer than maximum width. Hind tarsus 0.85–0.90 times as long as hind tibia. Hind tibia weakly widened posteriorly. Hind basitarsus with dense row of long bristles along ventral margin, 0.60–0.70 times as long as second through fifth tarsomeres combined. Second tarsomere of hind tarsus 0.40–0.45 times as long as basitarsus, 1.00–1.20 times longer than fifth tarsomere (without pretarsus). Claws distinctly curved.

Metasoma 1.30–1.70 times longer than maximum width, 0.75–0.90 times longer than head and mesosoma combined. First tergum distinctly and rather regularly widened from base to apex, with dorsal carinae complete, widely separated, subparallel or sinuate in posterior half; length of tergum 0.70–0.85 times apical width, almost equal to length of propodeum; apical width of tergum 1.60–2.00 times basal width. Groove between second and third terga distinct and weakly curved. Second tergum with sublateral oblique furrows more or less distinct but shallow or very shallow posteriorly, curved and almost parallel to lateral margins of tergum. Median length of second tergum 0.90–1.10 times as long as apical width of first tergum, 1.30–1.60 times length of third tergum. Median length of second and third terga combined 0.65–0.75 times maximum width. Ovipositor straight, sheath (depending on prominence behind tip of metasoma) 0.80–1.40 times longer than first metasomal tergum, 0.20–0.45 times as long as hind tibia, 0.15–0.40 times as long as mesosoma.

Sculpture and pubescence. Vertex densely and distinctly granulate, additionally more or less distinctly and weakly undulately strigate and rugulose, rarely vertex distinctly rugose-granulate, with short rugae along occipital carina; frons densely granulate-rugose or granulate-strigate; face distinctly and densely granulate with rugosity at least partly, narrow area smooth or almost smooth medially; temple entirely and densely distinctly granulate with rather coarse or fine areolate-rugosity. Mesoscutum entirely, distinctly, and densely granulate, often with rugosity anteriorly along notauli, finely granulate posteriorly. Scutellum finely or distinctly granulate. Mesopleuron mostly granulate-coriaceous, partially carinate, usually smooth in small submedian areas, rugose-strigate postero-ventrally. Propodeum entirely coarsely areolate-rugose, with granulation basally and (finely) between rugae; with more or less distinctly delineated areola and distinctly separated petiolate area; areola short and wide, 1.30–1.80 times longer than maximum width, distinctly separated from base of propodeum by more or less short basal carina. Hind femur areolate-rugose in upper half, almost smooth or sometimes finely granulate-coriaceous in lower half. First tergum rather finely and more or less densely carinate or partly carinate-rugulose, with more or less smooth or almost smooth (finely coriaceous) areas laterally, medially usually widely carinate-rugulose or sometimes only rugulose. Terga posterior to first tergum smooth, but shallowly punctate. Vertex entirely with rather dense, short, and semi-erect pale setae. Mesonotum with rather dense, short, semi-erect pale setae along notauli and laterally. Hind tibia dorsally with dense, short, and semi-erect setae, length of those setae 0.50–0.75 times maximum width of hind tibia.

Color. Body predominantly reddish brown, sometimes light or dark reddish brown to partly black, usually prothorax, often mesopleuron, mesosternum, and mesoscutum at least partly light reddish brown or at least pale, sometimes prothorax brownish yellow; metasoma widely medially yellowish brown or at least paler than lateral parts. Antenna predominantly dark brown, two to four basal segments of antenna reddish brown or at least paler. Palpi brownish yellow or pale brown. Legs light reddish brown or yellowish brown, hind tibia pale basally. Ovipositor sheath more or less reddish brown, infuscate apically, sometimes entirely almost black.

Male. Unknown.

Distribution. Austria (new record), Finland (new record), Mongolia, and Russia (Chita Province) ( Yu et al. 2005).

Remarks. The degree of reduction in wing size tends to vary within a brachypterous species. The fore wing extends behind the apex of the propodeum in some specimens of H. minialatus from the Chita Province of Russia and Mongolian Eastern Aymak; the fore wing extends behind the apex of the first tergum or to the middle of the metasoma in other specimens from those areas. Such variation demonstrates the limitations of using reduction in wing size for species diagnostics.

Figures

FIGURES 56–66. Hormius minialatus Tobias, female. 56. Head, front view. 57. Head, dorsal view. 58. Head, lateral view. 59. Basal and apical segments of antenna, lateral view. 60. Mesosoma and wings, dorsal view. 61. Mesosoma and wings, lateral view. 62. Hind wing. 63. Fore wing. 64. Hind femur, lateral view. 65. Apex of metasoma and ovipositor, lateral view. 66. Metasoma, dorsal view.

FIGURES 117–126. Habitus photos of brachypterous, micropterous, and apterous cyclostome braconids (117, 122–124 [dorsal view]; 118–121, 125–126 [lateral view]). 117. Dimeris mira Ruthe (female). 118. Eupambolus apterus Tobias (female, holotype). 119. Pambolus erogolus sp. n. (female, holotype). 120. Pambolus ovchinnikovi sp. n. (female, holotype). 121. Hormius minialatus Tobias (female, holotype). 122. Aleiodes hemipterus Marshall (female, lectotype). 123. Bracon barbieri sp. n. (female, holotype). 124. Chasmodon apterus (Nees) (female). 125. Lodbrokia mariae Sterzinski (female, holotype). 126. Panerema kamtshatica sp. n. (female, holotype).