Aleiodes jakowlewi (Kokujev, 1898)

van Achterberg, Cornelis & Shaw, Mark R., 2016, Revision of the western Palaearctic species of Aleiodes Wesmael (Hymenoptera, Braconidae, Rogadinae). Part 1: Introduction, key to species groups, outlying distinctive species, and revisionary notes on some further species, ZooKeys 639, pp. 1-164 : 73-75

Aleiodes jakowlewi (Kokujev, 1898) Figs 190, 191-202

Rhogas (Aleiodes) jakowlewi Kokujev, 1898: 307.

Aleiodes jakowlewi ; Shenefelt 1975: 1176; Papp 1991: 112.

Rogas jakowlewi ; Tobias 1986: 82 (transl.: 136).

Material.

*Finland: 2 ♀ (NMS), Pohjois-Savo, Kangaslampi, Malaise trap, 26. vi– 17.vii.2004 and 19. vii– 1.viii.2005, N.M. Laurenne; 1 ♀ (I. Kakko collection) Finland, Loppi Topeno, 67410xx: 33468xx, 24.viii.2006, I. Kakko; *Sweden: 2 ♀, 1 ♂ (BMNH), Skåne, Röstanga 6.vii.1938, D.M.S & J.F. Perkins; *Slovakia: 1 ♀ (MTMA), Smolnieká Huta, 2.vii.1956, M. Čapek.

Molecular data.

MRS355 (Finland JF962849, CO1).

Biology.

Nothing is known of the biology of this predominantly boreal species.

Diagnosis.

Head transverse in dorsal view and directly narrowed ventrally; eye rather large; antenna of ♀ sometimes with a narrow white or pale yellowish submedial band, scapus and pedicellus of ♀ similarly coloured as medial fifth of antenna; antennal segments of ♀ 49-52; OOL equal to width of posterior ocellus; length of malar space of ♀ 0.30-0.40 × (of ♂ 0.25 times) height of eye in lateral view (Fig. 200); speculum of mesopleuron rugose or reticulate and dull as remainder of mesopleuron; propodeum distinctly elongate (Fig. 190); fore wing narrow (Fig. 191); vein m-cu of fore wing straight and angled to vein 2-CU1 (Fig. 191); pterostigma dark brown with its basal third pale yellow; hind femur 4.9-5.5 × as long as its maximum width; hind trochantellus 2.2-2.7 × as long ventrally as wide (Fig. 194); hind tibia infuscate subapically, contrasting with yellowish apex of tibia (Fig. 194); tarsal claws only bristly setose, without distinct pecten; first metasomal tergite with lamella latero-anteriorly (Fig. 202), second metasomal tergite rather long; second tergite with small smooth triangular area medio-basally (Fig. 193); third tergite coarsely sculptured; fourth tergite with distinct sharp lateral crease and basally rugulose. Very similar to the East Palaearctic Aleiodes parentalis Belokobylskij, 2000; this species differs mainly by the wider hind femur, the subbasally yellowish first tergite (except two dark brown patches) and the more robust apical antennal segments.

Description.

Redescribed ♀ (NMS) from Kangaslampi (Finland), length of fore wing 4.5 mm, of body 5.5 mm.

Head. Antennal segments of ♀ 49, length of antenna 1.2 × fore wing, its subapical segments 1.7-1.8 × as long as wide; frons granulate, with satin sheen; OOL and POL 1.0 and 0.8 × width of posterior ocellus, respectively; vertex distinctly rugulose-granulate, with satin sheen; clypeus convex and coriaceous; ventral margin of clypeus thick and convex (Fig. 199); width of hypoclypeal depression 0.3 × minimum width of face (Fig. 199) and face mainly coarsely granulate with some rugulae; length of eye 3 × temple in dorsal view and temple directly narrowed behind eye; occiput behind stemmaticum rugulose-coriaceous; occipital carina complete, with short crenulae and dorsally curved (Figs 200-201); clypeus partly above lower level of eyes (Fig. 199); length of malar space 0.35 × height of eye in lateral view; eyes rather protruding (Figs 199-201).

Mesosoma. Length of mesosoma 1.8 × its height; mesoscutal lobes coriaceous, matt, but medio-posteriorly longitudinally rugose and anteriorly low; notauli narrow and crenulate; prepectal carina medium-sized, remaining separate from anterior border; precoxal area of mesopleuron and area above it largely rugose (Fig. 192); remainder of mesopleuron (including speculum) granulate and with satin sheen; metapleuron distinctly granulate and with satin sheen; mesosternal sulcus deep and sparsely crenulate; mesosternum rather angulate posteriorly; scutellum slightly convex, coriaceous, and laterally with carina; propodeum flattened, without tubercles and largely coarsely rugose, median carina complete.

Wings. Fore wing: r 0.5 × 3-SR (Fig. 191); 1-CU1 horizontal, 0.3 × as long as 2-CU1; r-m 0.6 × 2-SR, and 0.4 × 3-SR; second submarginal cell medium-sized (Fig. 191); cu-a inclivous, parallel with CU1b, straight (Fig. 191); 1-M straight and 1-SR angled to 1-M. Hind wing: marginal cell parallel-sided; 2-SC+R short; m-cu short and only weakly pigmented; M+CU:1-M = 15:10; 1r-m 0.7 × 1-M.

Legs. Tarsal claws with yellow bristles and small; hind coxa rugose-granulate, with satin sheen and 0.9 × as long as first tergite; hind trochantellus 2.7 × longer ventrally than wide; length of fore and hind femora 7.0 and 4.9 × their width, respectively (Figs 194-195); inner apex of hind tibia without distinct comb; length of inner hind spur 0.25 × hind basitarsus.

Metasoma. First tergite 1.2 × as long as wide posteriorly, stout, convex anteriorly and latero-anteriorly distinctly lamelliform; first–fourth tergites densely finely rugose (Fig. 193), with distinct median carina up to middle of third tergite; medio-basal area of second tergite minute; second suture medium-sized and crenulate; third and fourth tergites with complete sharp lateral crease; fifth and following tergites retracted; ovipositor sheath mainly densely setose and apically acute.

Colour. Dark brown; palpi, humeral plate, trochanters and trochantelli, fore and middle coxae, and ventral half of metasoma ivory or pale yellow; orbita posteriorly and tegula brown; legs (but hind femur (except basally) dark brown and fore and middle femora and hind tibia subapically infuscate), first tergite posteriorly, second tergite (except laterally) brownish yellow; ovipositor sheath black; veins and pterostigma (but basal third pale yellow) dark brown; wing membrane rather infuscate.

Variation. Antennal segments of ♀ 49(3), 50(1); of ♂ 48(1). In some females the antenna is distinctly white-banded (over about 23 rd– 27th segments) but in others, even from the same locality, the antenna is completely brownish. The anterior ocellus is sometimes enlarged, but this too seems to be variable and is not always noticeable.

Note.

From limited data males appear to have fewer antennal segments than females.