Chewing lice of the genus Myrsidea (Phthiraptera: Menoponidae) from the Cardinalidae, Emberizidae, Fringillidae and Thraupidae (Aves: Passeriformes) from Costa Rica, with descriptions of four new species Author Kounek, Filip Author Sychra, Oldrich Author Capek, Miroslav Author Lipkova, Alexandra Author Literak, Ivan text Zootaxa 2011 3032 1 16 journal article 46326 10.5281/zenodo.278715 631bcf14-5ada-441e-8de1-816275ccc240 1175-5326 278715 Myrsidea larvatae Sychra, 2007 Myrsidea larvatae Sychra [in Sychra et al. , 2007 ]: 62, Figs. 5–6 . Type host: Tangara larvata (Du Bus) —Golden-hooded Tanager. Material studied. 4 females and 3 males , ex Tangara larvata (Thraupidae) , COSTA RICA : Zona Protectora Las Tablas, La Amistad Lodge ( 8°54’N , 82°47’W ; 1300m ), 20 August 2010 , Sychra and Literak leg. Deposited in INBio (O.Sychra CR162–163) and MZM (O.Sychra CR164). Remarks. Our specimens differ from the description of M . larvatae presented by Sychra et al. (2007) by setal counts and dimensions as follows [setal counts and dimensions mentioned by Sychra et al. (2007) are in parentheses]: Female (n = 4) . Length of head seta 10, 0.045; seta 11, 0.100; ratio10/11, 0.45. Tergal setae: I, 27 (30–36); II, 28–31 (34–36); III, 28–33 (35–38); IV, 28–29 (39–40); V, 30–33 (35–43); VI, 33–34 (34–39); VII, 30–33 (33–36); VIII, 21–24 (25–27). Sternal setae: V, 35–38 (37–43); VI, 31 (32–36); sternites III–VII without medioanterior setae. Dimensions, TW, 0.41 (0.42–0.43); MW, 0.42 (0.43–0.46); TL, 1.43 (1.45–1.49). Male (n = 3) . Tergal setae: III, 34 (35–40); IV, 34 (35–40); V, 35–36 (37–43); VI, 33–36 (37–43); VII, 30–32 (32–38); VIII, 24–25 (26–27). Sternal setae: III, 31 (24–28); IV, 35 (32–34); V, 33 (34–35); VIII, 12 (9–11); sternite III with one medioanterior seta, other sternites without medioanterior setae. Dimensions: TW, 0.38–0.39 (0.39– 0.40); HL, 0.26–0.27 (0.27–0.28); MW, 0.33 (0.35–0.36); AW, 0.40 (0.42–0.44).