Ileterocera from Costa Rica, 37 



Rivula rufescenSy sp. n. 



cJ . Head, thorax, and fore wings brown tinged with 

 reddish, tiie thorax and basal lialf of wings darker. Abdo- 

 men above fuscous brown ; anal hairs light brown ; underneath 

 luteous, with black hairs at anus. Fore wings: a small 

 white spot at base of costa and point subbasally above sub- 

 costal; small white spots faintly edged witii black forming 

 an irregular antemedial line; a white medial spot on costa, a 

 fine line below it; spots in cell and below it; a point on 

 discocellular ; postmedial line also consisting of white points, 

 outcurved, inbent opposite cell, and deeply incurved from 

 veins 4-2, slightly outbent on inner margin ; white costal 

 spots towards apex ; faint subterminal spots. Hind wings 

 fuscous, thinly scaled in cell. Hind wings below wliitish ; 

 costa tinged with yellow and thinly irrorated with brown ; 

 a dark discal point, postmedial line, and subterminal shade. 



Female browner, darker, the white points less distinct. 



Expanse 16 mm. 



Hah. k5an Jos^. 



Rivula nigripuncta, sp. n. 



(^ . Body buff -grey, the abdomen dorsally shaded with 

 fuscous ; anal hairs brownish. Fore wings buff-grey, thinly 

 irrorated witli brown ; termen brown ; cilia darker buff-grey, 

 irrorated with dark brown, forming a central line and faint 

 oblique lines ; costa finely fuscous grey on basal third, then 

 more broadly so, interrupted by four small white spots ; a 

 fine fuscous line, almost medial, inbent in cell to small fuscous 

 orbicular spot ; two small black spots on discocellular; an 

 apical small black spot ; marginal white points. Hind 

 wings whitish, the veins and termen fuscous ; a dark terminal 

 line ; cilia fuscous tipped with white, entirely white at anal 

 angle. 



Expanse 1-4 mm. 



Hab. Carillo, Sixola. 



Rivula latipes, sp. n. 



cJ . Antennae with long finely ciliated pectinations. Palpi 

 rich dark brown, shaded below with orange-brown. Head, 

 collar, and thorax brown; patagia irrorated with lilacine 

 white. Abdomen fuscous above, underneath whitish on 

 basal half. Hind tibia and tarsi thickly tufted. Fore wings 

 dark brown ; a small, lilacine, black-edged spot at base of 



