S. Mahunka szerk.: Folia Entomologica Hungarica 54. (Budapest, 1993)

tenth segment present Aedeagus relatively short, apex with a pair of dorsoapical, heavily sclerotized plates and a pair of ventroapical, membraneous lobes. Inferior appendages long, robust, basal segment about three times as long as terminal which is incurved and parallel-sided. According to the structural pattern of the genitalia this species is close to D. aulitensis Kimmins described from Mt. Dulit of Sarawak. The arrangement of the tenth segment and inferior appendages differ. In my species the lateral process spiny, median one long slender on the tenth segment and the terminal segment of inferior appendages not claw-like. Holotype d. Tributary of River Sungai Gombak, 30 km from Kuala Lumpur, 21.XII.1991. Light collected by Oláh. Paratype <J. Same as holotype. Dinarthropsis brevipennis sp. n. (Fig. 7) Male (in alcohol). General colour brown. Head and scape darker. Antennae lighter, almost yellow. Scape 1.7 mm long. Its basomesal process bipartite unlike D. longipennis Weaver, terminal part less sclerotized and without setae, similar to D. picea Ulmer but shorter. Second mesal process longer than at D. longipennis but shorter than at D.

picea. Maxillary palp 2 mm long. Fore wing 8.9 mm long, venation different from D. picea, crossveinr-wi elongated and running paralel with Ml +2 and reaching stem M befor fork. Hind wind with much developed Fi. Male genitalia. Ninth abdominal segment annular, slightly produced middorsally and more ventrally. Pleuron half as long as venter. Tenth segment short, similar to D. longipennis, but lateral processes longer and slender and their apex not bifid. Dorsomesal pair more developed with additional small processes or protuberances and deeply separated by a mesal notch. Inferior appendages in lateral view with narrow basodorsal process, in ventral view with short mesal projection. Phallic apparatus not so long and slender as in the known two species of the genus. Parameres much reduced almost to a stout spine bearing a group of teeth on its basoventral part This is the third species of the genus forming a closely related group of species: D. picea Ulmer of Java, D. longipennis Weaver of Sumatra and my species from Malaysia which I named referring to the reduced lenght of the phallic apparatus especially that of the parameres. Holotype â

. Tributary of River Sungai Gombak, 25 km from Kuala Lumpur, Malaysia, 21. XII. 1991. Leg. Oláh. Singled along the main stream of the River Gombak. References Bishop, J. E. (1973): Limnology of a small Malayan River Sungai Gombak. -Mon. Biol. 22:1-485, Junk Publ. The Hague. Flint, O. S. Jr. (1991): Studies of Neotropical caddisflies, XLV: The taxonomy, phenology and faunistics of the Trichoptera of Antioguia, Colombia. - Smithsonion Cont. Zool. 520:1-113. Author's address: Dr. János OLÁH Fisheries Research Institute P.O. Box 47 H-5540 Szarvas HUNGARY