Psephenothrips baiheensis sp. n.

(Figs 90–97)

Female macroptera. Body length 3.6 mm. Color brown with tube darkest, eyes with red pigment; antennae segments I and II dark brown, same colour with head except distal end of II yellowish, III yellow, IV yellow with distal end brownish, V basal half yellow and distal half dark brown, VI–VIII dark brown; all femora, tibia and tarsi brown except fore tarsi yellow, fore wings hyaline; major body setae hyaline.

Head longer than width (Fig. 90), cheeks straight, blunt po setae subequal to length of eyes, maxillary stylets deeply reaching middle of eyes, touching or overlapping medially; antennal segment III and IV longest, about 1.4 times length of segment II, segment VIII cornical and shorter than VII (Fig. 97).

Pronotum with 5 pairs of prominent setae (Fig.91), all blunt; aa setae as long as or a little longer than am setae; pronotum notopleural suture complete. mesopresternum boat shaped with a sharp median protruding (Fig. 94); metanotum reticulated medially (Fig. 92); MSS present; fore femora slightly enlarged, pretarsal tooth absent; fore wing with 23–26 duplicated cilia.

Pelta triangular, with 2 CPS (Fig. 95); tergite II laterally with 2 accessary setae (Fig. 93); tergites II–VII with 2 pairs of wing-retaining setae, anterior margins of tergites III-VIII membranous (Fig. 93); tube shorter than head (Fig. 96).

Measurements (holotype in microns) Body length 3580, head median length 470; greatest width 340; postocular setae length 105, antennal segment (L/W) I 60/65, II 70/50, III 120/40, IV 100/50, V 80/40, VI 80/38, VII 60/32, VIII 50/18, total length 620, pronotum median length 220; greatest width 500; fore wing length 1500; pelta length 150, width 270; tube length 300.

Male macroptera. Body length 2.5 mm. Similar to female, fore tarsus without tooth.

Specimens examined. Taiwan. Holotype female, Guanziling (Baihe), dead wood, v. 1993; paratypes 1 female, 1 male with same data as holotype.

Etymology. Indicate the place Baihe, Tainan, where it was collected.

Comments. The dark brown color of distal half of antennal segment V and segments VI-VIII make this species distinct. Besides, the membranous anterior margins of tergites III-VIII make this species different from other Psephenothrips species.