Revision of Myiocephalus Marshall (Hymenoptera: Braconidae: Euphorinae), with description of one new species Author Tan, Jiangli Author Achterberg, Cornelis Van Author Tian, Xiaoxia Author Zhang, Ruonan text Zootaxa 2019 2019-11-18 4700 1 117 131 journal article 24870 10.11646/zootaxa.4700.1.6 97820d29-ba06-4777-9f5a-4003b72f0bd1 1175-5326 3545392 BD3E014F-6A3C-478E-9E37-62C9287E65E2 Myiocephalus zwakhalsi van Achterberg , sp. n. Figs 36–54 Type material. Holotype , ♀ ( RMNH ), “ Austria : Tirol , Aschbach , 1400 m , 22.viii.1975 , [ Malaise trap ], C.J. Zwakhals ” . Paratypes : 1 ♀ + 2 ♂ ( RMNH ), topotypic, and same date, but 1 ♂ with 16.viii.1975 . Short diagnosis. Length of malar space of ♀ 1.3–1.4 × basal width of mandible ( Fig. 48 ); width of face of ♀ equal to combined height of face and clypeus ( Fig. 46 ); occipital carina reaching dorsally near upper level of eye and sinuate laterally ( Fig. 48 ); area near occipital carina dark brown and occiput dorsally brown ( Fig. 47 ); basal half of first metasomal tergite with laterope visible in dorsal view ( Fig. 43 ); hypopygium of ♀ largely sclerotized, keeled ventrally, subtruncate or rounded posteriorly and with long setae ( Fig. 37 ); ovipositor (except basally) slender ( Figs 36, 38 ); mesopleuron of ♀ antero-dorsally largely rugulose and with some rugae medially ( Fig. 41 ); mesosoma laterally and legs largely dark brown or brown ( Fig. 36 ). Description. Holotype , ♀ , length of fore wing 3.0 mm, and of body 4.1 mm . Head. Antenna with 29 segments and 1.1 × as long as fore wing, third segment 1.2 × as long as fourth seg- ment, third, fourth and penultimate segments 4.0, 3.3 and 1.5 × as long as wide, respectively ( Figs 45, 50 ); length of maxillary palp 0.7 × height of head, segments slender ( Fig. 36 ); eye 2.8 × as long as temple in dorsal view; temples directly and linearly narrowed behind eyes ( Fig. 47 ); OOL:diameter of posterior ocellus:POL = 9:4:12; vertex and frons largely superficially coriaceous and shiny, but in front of ocelli mainly transversely rugulose; in front of anterior ocellus with small convexity ( Fig. 47 ); occipital carina complete (but reduced ventrally and remaining removed from hyaline hypostomal lamella) and dorsally remaining shortly below upper level of eyes ( Fig. 48 ); combined length of clypeus and face (measured from ventral rim of antennal socket to ventral border of clypeus) 1.1 × minimum width of face; face mainly very finely densely punctulate but latero-ventrally largely smooth, with whitish setae and satin sheen ( Fig. 46 ); clypeus convex medially and with slightly concave and thin ventral lamella ( Figs 46, 48 ), medially densely finely punctulate; anterior tentorial pits large ( Fig. 46 ); malar suture deep, narrow and straight; length of malar space 1.3 × basal width of mandible and malar space in anterior view straight ( Fig. 46 ); mandible slender, strongly twisted, outer side convex and with deep basal depression ( Fig. 48 ), its second tooth similar to first tooth and acute. FIGURES 36–38 . Myiocephalus zwakhalsi sp. n. , ♀, holotype. 36. Habitus, lateral aspect; 37. Fourth and fifth sternites and hypopygium, lateral aspect; 38. Detail of ovipositor sheath and ovipositor, lateral aspect. FIGURES 39–50 . Myiocephalus zwakhalsi sp. n. , ♀, holotype. 39. Fore wing; 40. Hind wing; 41. Mesosoma , lateral aspect; 42. Mesosoma , dorsal aspect; 43. Propodeum and first metasomal tergite, dorsal aspect; 44. First metasomal tergite, lateral aspect; 45. Basal segments of antenna; 46. Head, anterior aspect; 47. Head, dorsal aspect; 48. Head, lateral aspect; 49. Hind leg; 50. Apical segments of antenna. FIGURES 51–54 . Myiocephalus zwakhalsi sp. n. , ♂, paratype. 51. Habitus, lateral aspect; 52. Head, anterior aspect; 53. First metasomal tergite, dorsal aspect; 54. Head, lateral aspect. FIGURES 55–57 . Myiocephalus laticeps (Provancher) ♂, U.S.A. 55. Habitus, lateral aspect; 56. Head anterior aspect; 57. Head, dorsal aspect. Mesosoma . Length of mesosoma 1.3 × its height; side of pronotum mainly rugulose, dorsally largely punctulate ( Fig. 41 ); mesopleuron dorsally densely and finely rugulose ( Fig. 42 ), ventrally largely (including precoxal sulcus) rugose; prepectal carina absent medio-ventrally; episternal scrobe linear, long and posteriorly deep ( Fig. 41 ); mesosternum sparsely setose, convex and shiny; mesosternal suture shallow, narrow and smooth; notauli absent, mesoscutum very sparsely setose, flattened, moderately shiny and its posterior half with posteriorly converging aciculation ( Fig. 42 ); scutellar sulcus smooth and deep ( Fig. 42 ); scutellum anteriorly convex, smooth (except some rugulae antero-laterally) and shiny, medial part coriaceous, medio-posteriorly convex, smooth and no depression ( Fig. 42 ); metapleuron coriaceous-rugulose ( Fig. 41 ); propodeum slightly depressed medio-posteriorly between parallel carinae, anteriorly largely smooth and shiny, remainder densely finely rugose, and anterior face moderately differentiated from posterior face ( Fig. 43 ). Wings. Fore wing: 2-M unsclerotized; 1-R1 1.2 × longer than pterostigma; marginal cell slender; r:3-SR+SR1:2- SR = 5:59:17; vein r issued just behind middle of pterostigma; vein SR1 slightly curved basally ( Fig. 39 ); 1-CU1 slender and oblique; cu-a vertical; 1-CU1:2-CU1 = 3:13; basal and subbasal cells of fore wing similarly setose as other cells. Hind wing: M+CU:1-M:1r-m = 40:3:10; basal 0.7 of M+CU unsclerotized. Legs. Middle and hind legs very slender (tibia and tarsus together about 2.5 × longer than femur, tibia approx. 4 × longer than coxa; Figs 36 , 49 ); fore leg normal, tibia nearly 3 × as long as coxa; hind coxa finely aciculate dor- sally; length of femur, tibia and basitarsus of hind leg 7.0, 19.2 and 15.3 × as long as their maximum width; hind tibial spurs 0.2 × as long as basitarsus. Metasoma. First tergite 3.8 × longer than its maximum width, basal half with distinctly concave sides and lat- erope partly visible, distinctly widened basally, flat (except minute depression near adductor) and smooth; posterior half convex, subparallel-sided ( Fig. 43 ); first tergite open ventrally and laterope very deep and large; following segments smooth, compressed and shiny, third–eighth tergites concave medio-apically ( Fig. 38 ); second metasomal suture distinct; sternites folded medially ( Fig. 37 ), fifth sternite finely and obliquely aciculate, medio-posteriorly with long bristly setae and strongly protruding ( Figs 37, 38 ) and hypopygium folded and sclerotized medially, protruding medio-posteriorly and with apical fringe of bristly setae ( Fig. 37 ); ovipositor sheath rather robust, parallel-sided and widened basally, setose part 0.11 × as long as fore wing (but dorso-basally glabrous); lower valve of ovipositor compressed, widened in lateral view and apex of upper valve narrow and remainder cylindrical ( Figs 36, 38 ). Colour. Dark brown; palpi (but apical 3 maxillary segments infuscated), mandible, scapus, pedicellus ventrally, face, frons antero-laterally, temple ventrally and tegula (but humeral plate rather dark brown) fore legs (but tarsus largely, femur and trochantellus partly infuscate), pronotal side ventrally, propleuron, mesosternum anteriorly, middle leg (except dark brown trochantellus and base of femur), hind tibia and tarsus pale yellowish; remainder of legs infuscated brown ( Fig. 36 ); pterostigma and most veins of fore wing brown; wing membrane weakly infuscated. Variation. Length of fore wing 3.0– 3.1 mm , and of body 4.1–4.4 mm ; first tergite 3.8–4.2 × as long as its maxi- mum width; mesopleuron ventrally partly yellowish and less extensively rugose; ovipositor sheath moderately to hardly widened basally. Male . Length of fore wing 2.9–3.0 mm, and of body 3.2–3.6 mm ; antenna with 29(2) segments; length of malar space 1.6–1.7 × basal width of mandible; first tergite with some rugulae or aciculae medially; only sternites of basal half of metasoma folded medially and third–eighth tergites weakly concave posteriorly. Biology. Unknown. Distribution. Austria . Etymology. Named after its collector, friend and specialist of Ichneumonidae, Kees Zwakhals (Arkel) for his on-going efforts to collect interesting Braconidae for more than 50 years.