Description of a new species of Betrichia Mosely 1939 from Brazil and redescription of the type-species (Trichoptera: Hydroptilidae: Leucotrichiinae) Author De Souza, Wagner Rafael M. Author Santos, Allan Paulo Moreira Author Takiya, Daniela Maeda text Zootaxa 2016 4061 3 291 295 journal article 51214 10.11646/zootaxa.4061.3.9 aea3d6e7-f0bc-43ae-8dcc-942e3f2d9a20 1175-5326 265698 0441CC32-15C3-423D-B25B-6718C532BA4B Betrichia zilbra Mosely 1939 ( Fig 2A –E) Betrichia zilbra Mosely 1939 , 231 [type-locality: Brazil , Edo. Santa Catarina, Nova Teutonia; repository of holotype : BMNH, male]; Angrisano 1995 , 505 [distribution]. Description. Adult male. Length (from tip of head to wing apices) 2.5–3.0 mm. General color light brown (in alcohol). Head without modifications. Antennae simple with 20 antennomeres; scape slightly flattened, other antennomeres cylindrical. Ocelli 2. Tibial spur formula 1-3-4. Venation of anterior wings distinct, veins reaching wing margin. Posterior wing venation distinct; with long setae on anal margins. Mesoscutellum with transverse suture. Metascutellum pentagonal. Abdomen without visible modifications. Segment VII with mesoventral process. Male genitalia. Segment VIII shorter dorsally than ventrally; sternum with posteroventral margin truncate with long setae; tergum posterodorsal margin broadly concave. Segment IX internalized in segment VIII, open ventrally. Inferior appendages completely fused to each other, short; in ventral view, tapered to blunt apex; in lateral view narrow over length. Subgenital plate as long as the inferior appendages, wide ventrally; in lateral view, directed posteroventrad with tiny setae at narrow apex. Tergum X membranous, short and rounded in dorsal and lateral views. Phallus tubular basally, with median complex (window and dorsal process); dorsal process shorter than basal portion of phallus; with sclerotized plate and spine-like processes apically. Remarks. Betrichia zilbra resembles B. occidentalis in the presence of two ocelli in these species and by similarities in the male genitalia. According to Flint (1974) , these species can be separated only by the sclerotized plate of the phallus, which bears some small processes in B. zilbra and a pair of long spines in B. occidentalis . This species is reported from the Northeastern Region in Brazil for the first time in Bahia and Sergipe states. Material examined. BRAZIL : Bahia [new record]: Camacan, Rio Panelão em frente à fazenda Porangaba, 15°24'28''S , 39°32'0''W , 161 m , 1.iii.2012 , DM Takiya col., light trap, 1 male ( DZRJ ); Camacan, Fazenda Waldemar Farmácia, acima da represa de abastecimento, 15°25'17''S , 39°34'0''W , 5.viii.2008 , AR Calor col., light trap, 1 male (MZUFBA). Sergipe [new record]: Itabaiana, Parque Nacional da Serra de Itabaiana, Riacho Vermelho na propriedade particular, 10°44'15''S , 37°20'13''W , 198 m , 17.vi.2014 , DM Takiya, APM Santos, AC Domahovski & WRM Souza cols., light trap, 2 males ( DZRJ ); same data, except Riacho Coqueiro, 10°44'02''S , 37°20'22''W , 1 males ( DZRJ ); same data, except Riacho dos Negros, 10°44'50''S , 37°20'24''W , 202 m , 42 males ( DZRJ ); Santa Catarina , [Seara], Nova Teutônia, 27º11’S , 52º23’W , xi.1963 , F Plaumann col., det. OS Flint Jr, 1975, 1 male ( NMNH ). Same data, except i.1963, 3 males ( NMNH ). Same data, except ix.1963, 28 males ( NMNH ). Same data, except i.1964, 14 males ( NMNH ). Same data, except 300–500 m , ii.1964, 30 males ( NMNH ). ARGENTINA [new record]: Misiones , Arroyo Piray Mini, W Dos Hermanos, 23.xii.1973 , OS Flint Jr col., det. Flint, 10 males ( NMNH ). Arroyo Piray Guazú, N San Pedro , 22.xi.1973 , OS Flint Jr col., det. OS Flint Jr, 1 male ( NMNH ).