OCR Text |
Show 1902.] DRAGONFLIES OF THE " SKEAT EXPEDITION." 385 No supplementary basal postcostal nerve. Lower lip with short, rounded lobes. Lower sector of quadrilateral entirely absent. Very slender body. Basal postcostal nerve lying between the level of the two costal antenodal nerves. Upper sector of the quadrilateral of the fore wings not reaching to the first transverse nerve after the quadrilateral; in the hind wing it extends one cell further. 14 postcostal nerves on the fore wing. Certainly closely allied to C. gracillima as described by de Selys, but with the following points of difference :-Upper lip entirely black, Segments 2, 3 of abdomen without a pale dorsal stripe. C. gracillima is said by Sslys to come probably from the Celebes or possibly from Borneo. Kruger (Stett. ent. Zeit, 1898) remarks that the species known hitherto belonging to the " gracillima " section of the genus all came from Borneo. He describes a new species belonging to this section from Sumatra. The present specimen is in all probability a representative form of C. gracillima, and when better known will most likely require naming as a distinct species. Legion P latycnemls. * T r ich o cn em is jiembranipes (Rambur). Singapore. Malacca. * T ricjhocnemis octogesima Selys. Singapore. T r ich o cn em is bor neensis Selys. Cceliccia borneensis Kirby, Cat. Odonata, p. 128. 1 S , 4 $ from K wala Aring belong, I believe, to this species. Mr. Annandale's collection includes a fine series of insects belonging' to this genus; accordingly I prefer to leave these specimens without comment for the present. * C o pera v it t a t a (Selys). Malacca. COPERA MARGINIPES (R a n ib .) . Copera marginipes Kirby, Cat. Odonata, p. 129. Psilocnemis marginipes Kruger, Stett. ent. Zeit. 1898, p. 101. Four males and a female from Kwala Aring, Sept. 1899. These agree closely with Selys's description, but the males have the epistome and gen* largely yellow. The posterior pan- of tibias of the males are strongly dilated, and the uppei anal appendages are only one-fourth the length of the lower pair. P r o c . Z o ol. S o c . - l 902, V o l . I I . No. XXV . 25 |