Cremastobaeus indicus Mukerjee, 1994

Kamalanathan, Veenakumari & Mohanraj, Prashanth, 2017, The genus Cremastobaeus Ashmead (Hymenoptera: Scelionidae: Cremastobaeini) from India, Journal of Natural History 51 (33 - 34), pp. 1989-2056 : 2010-2013

Cremastobaeus indicus Mukerjee, 1994

( Figures 9 (a–h) and 10(a,b))

Female: Body length = 1.38 mm; (m = 1.35 (1.25–1.43) mm, SD = 0.05, n = 18)

Colour ( Figure 9 (a))

Head and mesosoma black; metasoma yellow except posterior tergites black; A1 yellowbrown, A2–A4 yellow with tinge of red; A5–A8 brown-yellow; clava dark brown; mandibles red-brown; legs yellow-brown with last tarsomere black.

Head ( Figure 9 (c,f,h))

FCI = 1.45; LCI = 0.9; IOS 0.41× width of head; POL>LOL in ratio of 12.6:7.1; lateral ocellus contiguous with orbit; eye large (L:W = 18.0:16.9), with dense white setae; frontal depression uniformly transversely striate the entire length; vertex coriaceous reticulate, setose; gena reticulate; length and width of antennomeres A1–A 8 in ratio of 17.2:4.2, 6.3:4.3, 6.1:4.0, 4.0:3.1, 3.5:3.2, 2.9:3.3, 2.3:3.3, respectively; length and width of clava 14.0:5.9; radicle 0.11× as long as A1.

Mesosoma ( Figure 9 (b–e))

Mesoscutum (L:W = 22.4:26.8) coriaceous reticulate and setose; lateral pronotal area dorsally coriaceous reticulate, medially smooth, ventrally weakly reticulate; netrion smooth; speculum with several transverse striae; mesepimeral sulcus foveate; mesopleural depression smooth; ventral mesopleuron finely reticulate; metapleuron above transverse metapleural sulcus smooth and beneath entirely weakly striate; mesoscutellum (L:W = 8.9:15.8) semicircular, weakly reticulate medially, coriaceous reticulate laterally, setose; posterior mesoscutellar sulcus foveate; metascutellum trapezoid (L:W = 3.3:6.7), foveate on anterior margin, remainder with uneven sculpture; metanotal trough foveate; lateral propodeal area weakly reticulate, foveate on ventral margin; fore wing (L:W = 82.0:32.5) and hind wing (L:W = 67.0:9.1) hyaline with dense microtrichia; length of marginal cilia of fore wing and hind wing 0.09× and 0.45× width of their wings, respectively; length of submarginalis: marginalis: stigmalis: postmarginalis in ratio of 33.0:5.4:6.8:24.5, respectively.

Metasoma ( Figure 9 (g))

(L:W = 61.6:28.9); T1 entirely costate with a smooth band posteriorly; T2 with basal foveae beneath from which costae extend entire length of tergite; space between costae narrow almost smooth; T3 with reticulations on anterior margin followed by costae extending the entire length of tergite except posterior smooth band; T4 with a row of reticulations on anterior margin followed by weak costae extending half the length of tergite, remainder reticulate; T5 medially smooth surrounded by reticulations; remaining tergites coriaceous reticulate; length and width of tergites T1–T 7 in ratio of 11.8:14.6, 10.4:23.6, 13.3:28.5, 10.6:27.7, 8.1:22.7, 3.9:15.0, 3.8:5.3, respectively.

Variation

Some specimens have metasoma yellow-brown and sculpture of metascutellum varies in the shape of carinae present.

Male ( Figure 10 (a,b))

Body length = 1.239 mm; (m = 1.313 (1.239 –1.369) mm, SD = 0.05, n = 6)

Male similar to female, except for colour. Entire metasoma dark brown except for yellow T1; length and width of antennomeres A1–A 12 in ratio of 10.8:3.0, 4.6:3.5, 5.3:3.8, 3.9:3.1, 3.2:3.2, 4.3:3.0, 3.2:3.2, 3.6:3.5, 3.8:3.3, 3.5:3.5, 6.3:3.5, respectively.

Material examined

1 female ( ICAR / NBAIR / P1116 ), INDIA: Karnataka: Tumkur, Hirehalli , 13.2718°N, 77.1801°E, 846 m, SN, 28 .I .2011, KV; 1 female ( ICAR / NBAIR / P1117 ), Andaman islands: South Andaman, Chidiyatapu , 11.5061°N, 92.7016°E, 12 m, SN, 21 .II .2012, KV; 3 females ( ICAR / NBAIR / P1120 , P1121 , P1122 ), Karnataka: Tumkur, Kunigal , 13.0201°N, 77.0348°E, 784 m, SN, 17 .III .2011, KV; 1 female ( ICAR / NBAIR / P1123 ), Karnataka: Chikkaballapur, Nandi Hills , 13.3702°N, 77.6834°E, 1448 m, SN, 22 .IV .2010, KV; 1 female ( ICAR / NBAIR / P1124 ), same data as P1120, 29 .III .2011, KV; 2 males ( ICAR / NBAIR / P1125 , P1126 ), Andaman Islands: Middle Andaman, Rangat , SN, 26 .I .2013, KV; 1 male ( ICAR / NBAIR / P1127 ), same as P1126, MT, 24 .I .2013, KV; 1 male ( ICAR / NBAIR / P1128 ), same as P1124, KV; 1 male ( ICAR / NBAIR / P1247 ), Andaman islands: South Andaman, Sippighat , 11.6103°N, 92.6851 ʹ °E, 8 m, SN, 26 . III .2016, KV; 1 female ( ICAR / NBAIR / P1255 ), Karnataka: Chikkaballapur, Nandi Hills , 13.3702°N, 77.6834°E, 1448 m, YPT, 18 . VI .2014, KV; 1 female ( ICAR / NBAIR / P1256 ), Karnataka: Tumkur, Kunigal , 13.0201°N, 77.0348 ʹ °E, 784 m, YPT, 05 .IV .2016, KV; 1 female ( ICAR / NBAIR / P1257 ), same as P1256, SN, 07 . VI .2011, KV; 1 female ( ICAR / NBAIR / P1258 ), Karnataka: Gandhi Krishi Vignan Kendra ( GKVK), 13.0800°N, 77.5755°E, 938 m, SN, 11 . III .2011, KV; 2 females ( ICAR / NBAIR / P1259 , P1260 ), Karnataka: Bengaluru, Nelamangala , 13.0874°N, 77.4110°E, 876 m, SN, 17 .I .2011, KV; 2 females ( ICAR / NBAIR / P1261 , P1262 ), Uttar Pradesh: Aligarh, AMU, 27.9000°N, 78.0880°E, 189 m, SN, 12 .VIII .2006, PM; 1 female ( ICAR / NBAIR / P1263 ), Maharashtra: Kolhapur, Panhala, Hotel Hilltop , 16.8079°N, 74.01072° E, 936 m, SN, 22 .XI .2012, KV; 1 female ( ICAR / NBAIR / P1264 ), Telangana: Hyderabad, National Academy of Agricultural Research Management ( NAARM), 17.3156°N, 78.4167°E, 550 m, SN, 14 .II .2012, PM; 1 female ( ICAR / NBAIR / P1265 ), Uttar Pradesh: Etah, Sakit , 27.4403°N, 78.7683°E, 164 m, SN, 08 .IX .2007, FRK; 1 female ( ICAR / NBAIR / P1178 ), Tamil Nadu: Dindugul, Thandikudi, Regional Coffee Research Station ( RCRS), 10.3041°N, 77.6457°E, 1305 m, YPT, 28 .XII .2016, PM; 2 males ( ICAR / NBAIR / P1129 , P1272 ), Tamil Nadu: Lower Pulney Hills, Thadiyankudisai, Horticulture Research Station ( HRS), 10.2995°N, 77.7117°E, 990 m, YPT, 30 .I .2017, PM.

Remarks

This species can easily be mistaken for C. luteus because of its yellow metasoma. However C. indicus can be distinguished from C. luteus by the following characters: in C. luteus the posterior margin of the metascutellum is well above the anterior margin of the lateral propodeal lobes and the metascutellum is at least 2.8× as wide as long whereas in C. indicus the posterior margin of the metascutellum is below the anterior margin of the lateral propodeal lobes and the metascutellum is at most 2× as wide as long.

Figures

Figure 9. Bright field images of Cremastobaeus indicus (female) (a) Habitus (dorsal view); (b) wings; (c) head and mesosoma; (d) meso- and metascutellum; (e) pleuron; (f) frons; (g) metasoma; (h) antenna.

Figure 10. Bright field images of Cremastobaeus indicus (male) (a) Habitus (dorsal view); (b) antenna.