Neoperla hamata Jewett 1975

(Figs. 26‐28, 94‐96)

Neoperla hamata Jewett, 1975:131. Holotype ♂ (California Academy of Sciences). Kaziranga, Kohara, Assam, India

Neoperla hamata: Uchida & Yamasaki, 1989:142. Redescription

Material examined. Vietnam: Nghe An, W of Con Cuong, Khe Moi Forestry Camp, Khe Moi River, 18 ° 56’ N, 104 ° 99’ E, 23‐24 October 1994, D. Currie, ROM 946110, 1 ♀ (ROM). Tuyen Quang, 6 km NE Pac Ban, UV light, 31 May 1996, D. Currie, D. Darling, J. Swann, ROM 963095, 1 ♀ pinned (ROM).

Remarks. In their study of the type material of this species, Uchida & Yamasaki (1989) indicate the female had been incorrectly associated, thus the true female of N. hamata has remained unknown. We offer the following description of female and egg for this species based on our associations from Thai material. Fig. 26. shows details of the head and pronotal color pattern.

Female. Forewing length 16 mm. Subgenital plate slightly produced, relatively wide and with a wide, shallow notch; central region of sternum 8 almost hairless (Fig. 28). Vagina long and slender with upturned apex (Fig. 27). Spermathecal stalk slender; spermatheca slender, short, curled and broadly hooked apically; a single accessory gland occurs near the spermathecal apex.

Egg. Pear shaped. Length ca. 0.31 mm, width ca. 0.22 mm. Collar sessile, ca. 0.08 mm wide at rim; rim not flanged; sides of collar with two irregular rows of cells; lower row of cells punctate; irregular low ridges extend from cell meshwork onto egg body (Figs. 94‐96). Chorion coarsely punctate throughout; pores surrounded by 4‐6 tiny spikes giving edges, particularly of lid, a spiny appearance.