中国广西春蜓属一新种 (蜻蜓目:春蜓科)

A NEW SPECIES OF NIHONOGOMPHUS FROM GUANGXI, CHINA (ODON ATA: GOMPHIDAE)

本文报道广西春蜒—新种,本种前唇黑色,是春蜓中除liefticki外第二种前唇为黑色者,它的雌性腹部第ix节腹板前缘呈V字形,可与本属所有种类的雌性相区别.

Nihonogomphus huangshaensis, sp. nov.Material studied:1 , holotype, Huangsha 25. 5N,109,9E, Guangxi province, collected by B. Y. Mao, deposited in the Biological Control Research Institute, Fujian Agricultural University-Boby length:59mm , Hind wing 40mm.Head:Black, with basal half of mandibles, anteclypeus, posterior half of top of frons, occiput and rear of occiput yellow.Thorax: Prothorax black, its anterior margin yellow. Dorsal stripe of synthorax very broad, ventrally confluent with almost entire length of the collar stripe which is interrupted in the middle. First lateral stripe ventrally confluent with the lower portion of the second lateral stripe, the upper end of which encircling the spiracle.Legs: Entirely black except front second trochanter with a ventral yellow spot and front femur with a ventral,yellow stripe.Wings: Hyaline, fore wings without apical brown spot.Abdomen: Middorsal yellow stripe of segments ii and iii very broad, tapering posteriorly, almost reaching apex of iii, interrupted between ii and iii. Segments iv to vii each with a pair of dorsobasal yellow spots. Segments x with a pair of basolateral yellow spots. Segment x dorsally with a small round yellow spot and laterally with yellow mark along the lateral margin. Epiproct and cerci yellow, the latter apically black.Structure: Occiput and rear of occiput somewhat bulging, fringed with a transverse row of hairs, occipital margin almost completely absent, but represented on each side near the eye by a short low ridge. Vertex with a pair of oblong tubercles situated obliguely mesodorsal to lateral o-celli. Subgenital plate nearly as long as sternite ix, inverted trapezoid, apically truncated, medially grooved, Anterior margin of sternite ix V-shaped, lateral margins of the incision rimmed, the apex of the incision reaching slightly surpassing the middle of the sternite.Etymology of the specific name huangshaensis: Huangsha is a county name of Guangxi province where the insect was collected.Remarks: This species which is placed in the genus Nihonogomphus is based on the salient character in that the occipital carina is absent. It is the second species of the genus, besides lieft-incki, that the labrum is black. It differs from lieftincfc in that the postclypeus is entirely black, without a yellow spot on each side. It is similar to shaowuensis in that the subgenital plate is triangular, nearly half as long as the ix sternite. Howerer, it differs from the female of all other species of the genus in that the enterior margin of ix sternite is V-shaped.Acknowledgemtnt -The authors wish to acknowledge with grateful the specimen collected by Mr. MAO Bengyong of the Teachers College of Dali, Yunnan province.