Trichadenotecnum proctum

Trichadenotecnum proctum View in CoL n.sp.

Figs. 66–71

Material examined. HOLOTYPE ♂, Sumatra: West , Batu Ampar , 2°00'S 101°25'E, tea plantation , 1360 m, 21.I.1997, ESK ( ZMB) GoogleMaps .

Female unknown.

Male

Colouration (c. 4 years in alcohol). Head ground colour whitish. Epicranial suture light brown, confluent brown patches each side across posterior border of vertex, and mesial to each orbit. Eyes black. Ocelli pale with black crescent mark between them. Frons unmarked. Gena dark brown ventrally. Antenna light brown except scape and pedicel dark brown. Epistomal suture pale medially and brown laterally. Postclypeus with brown striation. Basal quarter of anteclypeus dark brown, otherwise pale. Labrum and maxillary palp dark brown; intersegmental area of maxillary palp pale. Thorax whitish, dark brown along sutures. Fore wing with dense pattern of small dark brown markings as in Fig. 66. Hind wing (Fig. 67) suffused brown. Legs light brown except coxa, trochanter and second tarsal segment dark brown.

Morphology. IO:D 2.22. Fore wing venation as in Fig. 66. Hypandrium (Fig. 68) symmetrical: lateroapical spinous projection each side, medially to this each side a stout long spine; tongue slender, spinous distally; two groups of long setae each side of mid-line and scattered long setae on basal area. Phallosome (Fig. 69) “wishbone”-shaped. Epiproct (Fig. 70) with broad lateroapical sclerotized area and long cone-shaped distal lobe. Paraproct (Fig. 71) with broad apical spine and field of about 21 trichobothria.

Dimensions. B 2.6; FW 3.3; HW 2.4; F 0.54; T 1.09; t 1 0.33; t 2 0.1; t 1 /t 2 3.3; Ct 18 (t 1) 2 (t 2); f 1 0, 63; f 2 0.7; f 1 /f 2 0.9

Remarks. Endang et al. (2002) described Trichadenotecnum vaughani from West Java (1560 m). In fore wing markings and venation, and in the form of the hypandrium, T. vaughani agrees with typical representatives of Trichadenotecnum (see Thornton, 1961). Endang et al. (2002) noted that the general form of its hypandrium resembles that of T. thorntoni New, 1975 from Kenya, but the wing pattern of the latter is of Loensia -type. The present Sumatran species shows a mosaic of the features of the above two species. The fore wing pattern and hypandrium most resemble T. vaughani (asymmetrical with median oblong tongue), differing from it only in small details. The epiproct of T. vaughani is pentagonal, whereas that of T. proctum is of a quite distinctive shape.

The fore wing of this individual suggests relationship with the following species, known only from the female, and it is possible that they may prove to be conspecific once more material is available for study.