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 patersoni Price and Johnson, 2009 Myrsidea patersoni Price and Johnson, 2009 : 64 , Figs. 3–4 . Type host: Eucometis penicillata (Spix) —Gray-headed Tanager Material studied. 1 male , ex Eucometis penicillata (Thraupidae) , COSTA RICA : Rincon de la Vieja National Park, Sector Santa Maria, Sendero del Padre ( 10°46’N , 85°18’N ; 800m ), 22 August 2009 , Sychra and Literak leg.; 1 female and 1 male , ex Eucometis penicillata , 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 CR136–137). Remarks. This is the first record of this species of Myrsidea from Costa Rica . Our specimens differ from the description of M . patersoni presented by Price and Johnson (2009) by sternal setal counts and dimensions as follows [setal counts and dimensions mentioned by Price and Johnson (2009) are in parentheses]: Female (n = 1) . Sternal setae: IV, 29 (33–36); V, 34 (35–42); VI, 30 (32–34); VII, 15 (16–20); VIII–IX, 17 (19–24); sternites III–VII without medioanterior setae. Dimensions: HL, 0.31 (0.32–0.33); PW, 0.28 (0.29–0.31); AW, 0.62 (0.65–0.69); TL, 1.52 (1.62–1.65); ANW, 0.20 (0.23–0.24). Male (n = 2) . Length of head seta 10, 0.035; seta 11, 0.100; ratio10/11, 0.35. Sternal setae: II, 19 (14–16) marginal between asters, 7 (8–10) anterior; IV, 34 (26–29); V, 29 (31–33); VI, 26 (27–31); sternites III–VII without medioanterior setae. Dimensions: TW, 0.43–0.44 (0.44–0.45); HL, 0.27–0.29 (0.30–0.31); PW, 0.27 (0.28–0.30); AW, 0.48–0.49 (0.50–0.52).