Lestes trichonus, Belle, 1997

Belle, J., 1997, The genus Lestes (Odonata: Lestidae) Leach, 1815, in Surinam, Zool. Med. Leiden 71 (11), pp. 89-103 : 96

Lestes trichonus spec. nov.

( figs 8 , 27 )

Material.— District Nikerie: Sipaliwini (near airstrip), 15.ii.1961, 1 ♀ (holotype), D.C. Geijskes leg .

Female (holotype).— Total length ca. 42; abdomen 33.5; hind wing 21.5; costal edge of stigma in fore wing 1.6.

Head.— Labrum glossy brown. Top of head yellowish-brown. Labium pale brown. Rear of head pale yellow.

Thorax.— Prothorax brown-yellow. Dorsum of pterothorax brown with a pair of narrow dark brown antehumeral stripes parallel to the mid-dorsal carina; these stripes attain anteriorly the mesothoracic margin but dorsally they do not attain the antealar sinus. Mesepimeron with a dark brown stripe, narrow dorsally, becoming wider below where it attains the humeral suture; this stripe continued on mesinfraepisternum. Metathorax largely pale green. Venter of pterothorax with long pale hairs. Pectoral colour pattern shaped as shown in fig. 8.

Legs.— Brownish-yellow but anterior side of first and second femora brown.

Wings.— Hyaline. Venation and stigma dark brown. Postnodal cross-veins 13­ 14/13-12 in fore and hind wings, respectively. R3 branching between fourth and fifth Pns in right fore wing, between third and fourth Pns in left wings, and between second and third Pns but close to third Pn in right hind wing.

Abdomen.— Segments 1-7 brown on dorsum, the lower sides of basal segments pale yellow. Segments 8-10 and anal appendages brown. Terminal segments shaped as described in the key and as shown in fig. 27.

Remarks.— It is with some hesitation that I have named this species on the basis of one single female only. But the presence of long pale hairs on the venter of the pterothorax is very distinctive. The corresponding male may at once be recognizable by this character, and furthermore in having a more or less similar pectoral colour pattern and in having legs with the same colour design.

Etymology.— The specific name trichonus is a Latin transliteration with ending -us of the Greek name trichon, in reference to the hairs on the pterothoraic venter.

Figures

Fig. 1, Lestes basidens spec, nov.; 2, Lestes mediorufus Calvert; 3, Lestesforficula Rambur; 4, Lestes curvatus spec, nov.; 5, Lestes tenuatus Rambur; 6, Lestes tenuatus Rambur, lectotype; 7, Lestes edentatus spec, nov.; 8, Lestes trichonus spec, nov.; 9, Lestes sublatus Hagen in Selys. 1-9, pectoral colour pattern [12.5 X 0.63],

Fig. 22, Lestes tenuatus Rambur; 23, Lestes mediorufus Calvert; 24, Lestes edentatus spec, nov.; 25, Lestes forficula Rambur; 26, Lestes curvatus spec, nov.; 27. Lestes trichonus spec. nov. 22-27, terminal segments of female abdomen, left lateral aspect [6.3 x 2.5].