OF WASHINGTON, VOLUME XIV. 1912. 215 



Orthogramma olivescens, sp. n. 



Male. Palpi dark olive green. Head brown. Body and wings olive 

 buff. Fore wings: some antemedial white scaling on veins; some scattered 

 white irrorations on medial space; a gray-brown medial shade expanding 

 outwardly on subcostal, median, and submedian, not reaching inner margin, 

 crossing in cell the round dark brown orbicular spot; reniform large, dark 

 brown shaded with white in front and behind, also followed by a white 

 shade to line, which is dark brown, fine, outwardly pale edged, and extends 

 from apex to beyond middle of inner margin; an irregular row of small 

 subterminal black and white spots; terminal brown triangular spots. 

 Hind wings: a straight postmedial fine brown; subterminal spots inset on 

 inner margin and slightly larger. Wings below olive brown; dark discal 

 points; a brown postmedial line slightly curved. 



Expanse, 39 mm. 



Habitat: St. Laurent, Maroni River, French Guiana. 

 Bendis brevimarginata, sp. n. 



Male. Body dark grayish brown shaded with purple, the patagia in 

 front bright red. Wings purple brown tinged with red; termen finely red; 

 cilia white basally crossed by a red line, terminally olive gray irrorated 

 with white. Fore wings : extreme costa for two-thirds dull olive, edged 

 behind by a white line which expands to extreme costa on outer third and 

 does not quite reach apex; indistinct antemedial and postmedial geminate, 

 darker, wavy lines, marked by white points on inner margin; a faint darker 

 line on discocellular. Hind wings : Costal margin broadly dull dark brown; 

 a medial and postmedial darker line; the anal angle obliquely truncated. 

 Wings below dull brown tinged with purple terminally, broadly at apex of 

 fore wing; a dark postmedial line; cilia brown, crossed by a broad white 

 line. 



Expanse, 37 mm. 



Habitat: Rockstone, British Guiana. 

 Tyrissa bellula, sp. n. 



Female. Palpi mottled brown and grayish buff. Head brown, vertex 

 mottled with gray. Collar crossed by a velvety black line. Thorax whit- 

 ish irrorated with brown. Abdomen pale brown with white segmental 

 lines. Fore wings white, shaded and irrorated with grayish brown, the 

 costa arched antemedially, incurved postmedially; basal line reduced to 

 angled spots on costa and median; antemedial defined by shadings, form- 

 ing an angled white line on costa, and an incurved line below cell, with a 

 short dark streak in cell followed by the orbicular white point; a small 

 black spot follows antemedial below cell; medial line fine, dark brown, 

 outangled on subcostal; markings on discocellular very confused, forming 

 a horizontal narrow oval spot in front, and a small dark-edged spot behind; 

 postmedial fine from vein 8, deeply lunular beyond cell, crossed by a black 

 line below 6, outset below 5, and wavily oblique to inner margin near 



