NEW SPECIES OP LEPTONEMA GUÉRIN FROM MADAGASCAR (TRICHOPTERA) BY JAN SyKORA National Museum of Prague, Chekhoslovakia When studying Caddis Flies in the National Museum of Prague, Chekhoslova-kia, I had the opportunity to name a small collection of Madagascan Trichoptera belonging to the genus Leptonema. Two new species from this material are described below. Two already described species are discussed. Leptonema zahradniki spec. nov. (fig. 1-^4) This species is dedicated to my colleague, Dr. J. Zahradnik, to whom I am indebted for allowing me to study the collection of the National Museum in Prague. Typical locality: Madagascar, leg. Olsoufieff. Material: Holotype, 1 $ . Paratypes, 3 $ . Deposited in the collection of the National Museum, Prague. This species differs from all other species of Leptonema described from Mada-gascar in the anatomy of the male genitalia and of the tenth segment. There are four processes projecting from the tenth segment, which are characteristic for this new species (fig. 1,2). Some characteristic differences are also found in the shape of the clasper (apical joint) and in the aedeagus. Head, antennae, palpi and legs pale brown, abdomen brown, on the dorsal side dark brown, ventral pale brown. Anterior wings yellowish, at the apex with pale brown reticulation. Male genitalia. The ninth segment strongly sclerotised, with a triangular projection on the dorsal side. Tenth segment, viewed dorsally, is very broad, with four processes on either side. The basal pocesses are oval, the caudal are sickle-shaped. The caudal end of the tenth segment is only slightly excised in the bilateral process. On the laterodorsal side at the base of the tenth segment there is a quad-rangular projection armed with hairs (this is a bigger basal "wart" than that of L. affine Ulm. discussed by Mosely, 1933). All four of these processes are visible in lateral aspect. They are proportionally bigger than those of L. affine Ulm. The main body of the tenth segment is smaller than that of L. affilie Ulm. The clasper is two-jointed and has a long basal segment, thick in the middle and strongly tapering towards the apex. This segment is somewhat curved medially at the base. The terminal segment is longer than that of L. affine Ulm. and is similar to that of L. madagascariense Ulm. but it is straight and obliquely truncate at the apex. The aedeagus is very broad at the apex and tapering towards the base. 277
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