Myrsidea icterocephalae Price and Dalgleish, new species (Figs. 11)

Type host. Tangara icterocephala (Bonaparte), Silver­throated Tanager.

Female (10). Metanotum not enlarged, with 11–16 marginal setae. Abdominal tergites shaped much as for M. tangarae (Fig. 10). Tergal setae: I, 8–11; II, 21–31; III–V, 30–37; VI, 28–35; VII, 24–31; VIII, 19–24. Postspiracular setae extremely long on IV, shorter on III and V–VII. Sternal setae: II, 25–35; III, 22–31; IV–V, 28–46; VI, 25–37; VII, 15–24; VIII–IX, 21–24. Dimensions: TW, 0.42–0.44; HL and PW, 0.27–0.30; MW, 0.39–0.42; AWIV, 0.53–0.58; ANW, 0.20–0.22; TL, 1.40–1.49.

Male (10). Metanotum with 11–14 marginal setae. Tergal setae: I, 13–19; II, 23–31; III, 28–34; IV–V, 30–36; VI, 28–33; VII, 26–32; VIII, 20–27. Sternal setae: II, 26–31; III, 20–26; IV, 27–32; V, 29–35; VI, 25–30; VII, 18–21; VIII, 7–11. Genital sac sclerite 0.085– 0.090 long, as in Fig. 11. Dimensions: TW, 0.39–0.41; HL and PW, 0.25–0.29; MW, 0.32– 0.36; AWIV, 0.41–0.46; TL, 1.14–1.22.

Type material. Holotype female, ex T. icterocephala, COSTA RICA: Las Cruces Biological Station, Cota Brus, 18–21 Apr 1992, R. L. Fisher . Paratypes, all ex T. icterocephala: 6 females, 5 males, same data as holotype; 4 females, same except 26 Jun 1993, R. L. Fisher 644 and 646; 6 females, 13 males, same except Wilson Botanical Garden, Las Cruces, 20 Apr 1992, Fisher 84, 118, and 148; 13 females, 14 males, same except 19 Apr 1992, Fisher 53, 93, 99, and 103.

Remarks. This species is anatomically very similar to M. tangarae, but differs in having both sexes with more gular setae (41/59 with 5 + 5 setae, 1/59 with 5 + 6, 16/59 with 5 + 4, and only 1/59 with 4 + 4) and smaller dimensions. The male has fewer setae on tergite I and a slightly different genital sac sclerite (Fig. 11 vs Fig. 23).