Embolemus krombeini Olmi, 1996

Olmi, Massimo, Mita, Toshiharu & Guglielmino, Adalgisa, 2014, Revision of the Embolemidae of Japan (Hymenoptera: Chrysidoidea), with description of a new genus and two new species, Zootaxa 3793 (4), pp. 423-440 : 428-429

3. Embolemus krombeini Olmi, 1996

( Fig. 3 )

Embolemus krombeini Olmi 1996: 123 ; Xu et al. 2001: 215; Xu et al. 2012a: 119.

Redescription. Female. Micropterous; length 3.3 mm. Completely testaceous. Antenna geniculated, filiform, without rhinaria, slightly shorter than head + mesosoma + metasoma (43:52); antennal segments in following proportions: 24:6:8.5:11:11:11:10:10:9:11. Head ( Fig. 3 A) shiny, alutaceous, covered with short hairs, unsculptured, with dorsal side flat; anterior region of dorsal side little tapering; occipital carina complete; ocelli absent; eye ( Fig. 3 A) small, approximately 0,2 as long as head (6:30); region of face from clypeus to antennal toruli with two hardly visible convergent longitudinal and median sutures. Maxillary palpi missing in only known female specimen; labial palpi 2-segmented. Pronotum shiny, alutaceous, covered with short hairs, with two fine lateral incomplete carinae beginning at posterior border and reaching about 0.5 × length of pronotum; pronotal tubercle reaching tegula. Scutum subrectangular, very short, alutaceous, without tracks of median furrow. Notauli absent. Parapsidal lines hardly visible near lateral margins of scutum. Scutellum ( Fig. 3 B) subcircular, very short, alutaceous. Metanotum reduced, transverse, very short ( Fig. 3 B). Meso-metapleural suture complete. Mesopleuron and metapleuron dull, rugose, transversely striate. Propodeum dull, reticulate rugose, with spiracles normally prominent, with two lateral pointed apophyses on sides of posterior surface; dorsal surface without median depression situated at border between anterior and posterior surface ( Fig. 3 C). Dorsal surface apparently without two lateral carinae connecting spiracles to pronotal tubercles, by running laterally to metanotum, scutellum and scutum. Fore wing strongly reduced, approximately as short as tegula. Hind wing absent. Petiole short. Tibial spurs 1/2/2.

Male. Fully winged; length 1.6–3.4 mm. Head testaceous, with ocellar triangle darkened; antenna testaceous, with segments 3–10 darkened; mesosoma testaceous, except propodeum darkened; metasoma brown; legs testaceous. Antenna not geniculated, filiform, not thickened distally, without rhinaria; antennae articulated to prominent contiguous processes; antennal segments in following proportions: 9:3:9:10:10:9:9:8:8:9. Head shiny, usually unsculptured, occasionally dull and granulated, covered with short hairs, with dorsal side swollen; occipital carina complete; ocelli distinct; POL = 2,5; OL = 2; OOL = 4; OPL = 2; TL = 7; faces without track of median furrow; eye small, approximately 0,5 as long as head (7:16); region of face from clypeus to antennal toruli with two hardly visible longitudinal very convergent and median sutures. Maxillary palpi with four or six segments; labial palpi with two or three segments (palpal formula 4/2, or 6/2, or 6/3.). Pronotum very short. Scutum shiny, finely punctate, unsculptured among punctures, covered with short hairs. Occasionally scutum dull and granulated. Notauli incomplete, reaching approximately 0.3 × length of scutum. Parapsidal lines distinct. Scutellum dull, rugose. Metanotum shiny, short, transverse. Propodeum dull, reticulate rugose; dorsal surface with track of two median and longitudinal keels from anterior margin to posterior surface. Mesopleuron dull, rugose. Mesometapleural suture distinct and complete. Metapleuron shiny, smooth, unsculptured. Fore wing hyaline, without dark transverse bands; 1 SDC cell open. In small (length 1,6 mm) specimen from Sarawak, 04°13’N 114°56’E, 1DC and 1SDC cells completely open, because not enclosed by pigmented veins. Proximal membranous process of paramere without papillae or sensorial filaments, at most with short hairs ( Fig. 1 B). In specimen from Taiwan, Dehuashe, proximal membranous process of paramere with small area provided of mosaic drawing. Tibial spurs 1/ 2/2.

Material examined. Types: Holotype of E. krombeini Olmi , ♀: INDIA: Maharashtra, Poona, 16.I.1962, E.S. Ross & D. Cavagnaro leg. ( CAS). Paratypes of E. krombeini Olmi (74♂): BRUNEI: Bk. Retak, 1600 m, IX.1979, I. Gauld leg., 1♂ ( BMNH); Ulu Temburong, 04°26'N 115°16'E, 300 m, Base Camp hut, 16.II–9.III.1982, M.C. Day leg., 1♂ ( BMNH); Ulu Temburong, 300 m, II–III.1982, M.C. Day leg. ( BMNH). INDONESIA: Java, Tjibodas, 5000–7000 ft., VIII.1913, Dr. Koningsberger leg., 2♂ ( BMNH, AMNH); Sulawesi Utara, Gunung Mogogonipa, 1000 m, V.1985, 2 ♂ ( BMNH); Sulawesi Utara, Dumoga Bone National Forest, Gunung Mogogonipa, 00°27'N 123°56.5'E, 1008 m, V–VI.1985, A.D. Austin leg. ( AEIC); same locality label, 1–24.XI.1985, Project Wallace, BMNH 1985-10, 2 ♂ ( BMNH); Sulawesi, near Mamasa, Penannang, 1700 m, 10–22.IV.1991, C. v. Achterberg leg., 2♂ ( RMNH, AMNH); same locality label, 1850 m, 1♂ ( RMNH). MALAYSIA: Malaya, Negeri Sembilan, Pasoh Forest Reserve, secondary forest, 8.III.79; 8.IV.79; 14.IV.79; 11.V.79; P. & M. Becker leg. ( AEIC); same locality label, primary forest, 8.X.78; 22.XII.78; 18.II.79; 7.III.79; 19.IV.79; 24.IV.79; 18.V.79; 21.VI.79; 11.VII.79; 3.X.79; 5.XI.79; 18.II.80; 24.III.80; P. & M. Becker leg. ( AEIC); same locality label, forest, 12.II.79; 6.X.79; 27.II.79; 12.IV.78; 16.V.78; 17.IX.78; 6.X.78; 29.X.79; 13.II.80; 15.I.80; 16.IV.79; 8.V.80; 6.IV.80; 19.IV.80; 13.III.79; 10.IX.79; 20.IX.79; 19.II.79; 10.XI.79; 30.XI.79; 19.IV.79; P. & M. Becker leg. ( AEIC); same locality label, forest gap, 3.IX.78; 10.VII.78; 10.I.80; 13.II.80; 11.X.79; 23.IX.79; 20.IX.79; 26.IX.79; 4.VI.79; 10.III.79; 19.III.79; 23.XI.79; 3.XII.79; 17.VIII.79; 3.VIII.79; 20.X.79; P. & M. Becker leg. ( AEIC); Malaya, Cameron Highlands, Gunong Beranban, 5800', Malaise trap, primary forest, 28.VIII–5.IX.1992, A.D. Austin leg., 2♂ ( ANIC); Sabah, near Long Pa Sia (west), 1020 m, 1–14.IV.1987, C. v. Achterberg leg., 1♂ ( RMNH); Sabah, Sipitang, Mendolong, 19.IV.1988, S. Adebratt leg., 1♂ ( ZIL); Sarawak, 4th Division, Baram District, Gunung Mulu National Park, 04°03'N 114°56'E, 6.VI.1978, Below Camp 4, 1700 m, V.F. Eastop leg., 1♂ ( BMNH). PHILIPPINES: Mt. Data, 7800', oakforest, 30.XII.1952, H.M. & D. Townes leg. ( AEIC). SRI LANKA: Badulla District, Ulhitiya Oya, 15 mi. NNE Mahiyangana, 5–6.IX.1980, Malaise trap, K.V. Krombein, P.B. Karunaratne, T.Wijesinhe, L. Jayawickrema & V. Gunawardane leg., 1♂ ( USNM); Nuwara Eliya District, 5,6 mi. SW Nuwara Eliya, Kanda-ela Reservoir, 6200 ft., 10–21.II.1970, Davis & Rowe leg., 1♂ ( USNM). Other material. JAPAN (new record): Ryukyu Islands, Okinawa Prefecture, Okinawa-jima Island, Nago City, Mt. Nago-dake, 22.V.2004, T. Mita leg., 1♂ (TUA).

Hosts. Unknown.

Distribution. Brunei, India, Indonesia, Japan (Ryukyu Islands) (new record), Laos, Malaysia, Philippines, P.R. China, Sri Lanka, Taiwan, Thailand, Vietnam ( Xu et al. 2012a).

Remarks. Two male paratypes of E. krombeini from Mangole Island (Sula Islands, Indonesia), designated by Olmi (1996) and deposited in RMNH were afterwards attributed to E. pecki Olmi 1997 .

Figures

FIGURE 1. Male genitalia (right half removed) of Embolemus hachijoensis (A, paratype from Japan, Hachijo Island), E. krombeini (B, from P. R. China, Yunnan, Gaoligongshan), E. pecki (C, from P. R. China, Fengyangshan), E. sensitivus (D, from P. R. China, Naban River National Nature Reserve), and E. ruddii (E, from Slovenia, Herceg Novi). Scale bar 0.16 mm.

FIGURE 3. Embolemus krombeini, female holotype. A. Head in lateral view. B. Mesosoma in dorsal view. C. Outline of border between anterior and posterior surface of propodeum. Scale bar 1.1 mm for A, 0.6 mm for B, 0.3 mm for C.