Myrsidea cayanensis Price, Hellenthal and Dalgleish, new species (Figs. 18–19)

Type host. Myiozetetes cayanensis (L.), Rusty­margined Flycatcher.

Female. Dorsal thorax and dorsoventral abdomen as in Fig. 18. Metanotum with 9 marginal setae. Tergite I with very slight medioposterior convexity, II with wide rounded convexity, III with moderate rounded convexity, IV–VI with slight median compression, and VII–VIII normal. Tergal setae: I, 13; II–V, 14–15; VI, 13; VII, 11; VIII, 8. Postspiracular setae shortest on V, moderately long on I, III, and VI–VIII, and very long on II and IV. Sternal setae: II, each aster with 4–5 setae, 26 other setae; III, 25; IV, 40; V, 54; VI, 41; VII, 17; VIII–IX of subgenital plate, 20; posterior margin of subgenital plate with heavy irregular spiculations (Fig. 19). Anus with 37 setae in dorsal fringe, 32 in ventral. Dimensions: TW, 0.50; HL, 0.34; PW, 0.31; PSL, 0.12; MW, 0.44; MSL, 0.16; AWIV, 0.61; ANW, 0.22; TL, 1.55.

Male. Unavailable.

Type material. Holotype female (NMNH), ex M. cayanensis, VENEZUELA: Edo. Bolivar, 60 km E Sta. Elena, Jan 1987, R. C. Dalgleish.

Remarks. The female of this species, with its modification of the anterior abdominal tergites (Fig. 18) coupled with the unusual spiculation associated with the posterior margin of the subgenital plate (Fig. 19), the small number of marginal metanotal setae, and the large number of sternal setae on IV–VII, is separable from others of this group.