S. Mahunka szerk.: Folia Entomologica Hungarica 47/1-2. (Budapest, 1986)

Male genitalia. Ninth segment almost triangular in lateral view. Its tergite on the dorsum reduced to a very thin hardly visible transverse band. Its sternite in ventral aspect forming a nearly tetragonal shape with two anterolateral and one anteromedian sinuate excisions. Tenth segment comprising a pair of extremely long, slender spines, forming a complete arch in side view and running parallel beyond the inferior appendages. Their apices not crossing. The spines are fused basally. Their base covered by the also fused base of the two long upwards directed, slender superior appendages. No short processes visible on this basement (at least not on the caustic potashtreated pale holotype genitalia). Aedeagus forming also a complete arch in lateral aspect and ornamented with a sclerotized, small, horizontally situated halfring, midway on the arch. Dorsum with a median groove along the whole length and with a middle circular part separating the sclerotized basal half from the apical membranous part. Inferior appendages stout, twice as long as wide in side view. Its upper margin excised subapically. Apical part curving downwards then sharply upwards. In ventral view the basic units of the inferior appendages taper gradually from base to the apices which then curve inwards. The basic units are supplied with three branches. Inner margin produced upwards, midway, to form a rounded, highly setose lobe. At the anterior end of the inferior appendages, from the dorsal angle, two strong flattened spines arise and run along the aedeagus. The third branch arises from the dorsal angle posterior to the joining of the flat spine. This is a slender branch broadening apically then tapering dorsoapically. This species is very close to T. uncata Kimmins, 1962 described from the nearby country Uganda. However, there are well-defined differences both in the wing venation and in the genitalic structure, In the fore wing Cu^ represented by a cross-vein starting well beyond anastomosis to Cu2+A and not from the anastomosis. In the hind wing 1*4+5 ^1+2 c

orifluent for a distance in T. uncata and not for T. tanzanica

. The tenth segment of my species forming a much longer pair of spines without apical crossing. There are no visible short processes on the dorsum of the basement of the superior appendages. There are significant differences also in the shape of the inferior appendage complex with the three branches. Holotype t , USA River, Tanzania, IX.

1965-11.1966, leg. SZUNYOGHY. Deposited at the Zoological Department, Hungarian Natural History Museum, Budapest. Right pair of wings mounted as dry microscopic preparation. The caustic potash-treated abdomen and the remainding part of the body are stored in a single airtight selfstanding vial filled with 70 % ethanol. REFERENCES MOSELY, M.E. (1939): Mission Scientifique de 1' Omo 5(54). Trichoptera. - Mem.

Mus.Nat.Hist. Natur.Paris Nouv.Ser. j): 293-301. SZUNYOGHY, J. (1967): The scientific results of the Hungarian Zoological Expeditions to Tanganyika. 8. A General Report of the Third Expedition. - Annls hist.-nat. Mus. natn.Hung. 58

: 255-275. Author's address: Dr. J. OLÁH Fisheries Research Institute H-5541 Szarvas Hungary