LACOSOMA. By Dr. W. Schatjs. 
659 
from just beyond middle of costa to below middle of inner margin. Forewing below: base obliquely to line and 
inner margin buff white, otherwise ochraceous buff; line as above; a large hair brown patch from vein 3 to inner 
margin beyond line. Hindwing below: line fine, almost subterminal, excurved slightly from costa, bulging 
from vein 5 to vein 2 and inbent to inner margin; the darker terminal shading extending within line. Expanse: 
male, 42 mm; female, 52 mm. French Guiana. Same shape as turgidus and ligina with termen slightly crenulate. 
B. batesii Newm. (88 d). Male : Body and wings light fawn colour, the lines fine, darker; some scattered batesii. 
black scales on wings except on termen. Forewing: antemedial line very faint; discal spot small, faintly outlined; 
outer line oblique from costa, angled and inbent below vein 7; cilia orange cinnamon. Hindwing: the line medial; 
cilia whitish at tips. Expanse: 40 mm. Santarem, Amazons. A female from the Berlin Museum is figured. 
B, trailii Btlr. (= venata Dogn.). Male-. Body and wings light pinkish cinnamon thickly irrorated with trail'd. 
buckthorn brown; abdomen with whitish segmental lines. Forewing: an oblique hyaline spot at discocellular, 
dark edged and crossed by vein 5; postmedia] line tawny olive outwardly edged with white, oblique from costa 
and sharply angled below vein 7, then straight, inbent to inner margin; veins on terminal area finely streaked 
with pinkish buff and pale tawny olive; cilia tawny olive tipped with white on interspaces; the termen slightly 
crenulate below vein 3. Hindwing: the line as on forewing, straight, postmedial: veins beyond line streaked with 
tawny olive, paler than the line; cilia as on forewing; termen slightly crenulate. Wings below as above. Expanse: 
' male, 39 mm; female, 46 mm. The Guianas; Ponte Nova, Amazons. The apex of forewing is acute, the termen 
inbent, straight; the anal angle of hindwing slightly produced. The female has the outer margins rounded. 
5. Genus: L^acosoina Grt. 
Male : Frenulum present. Antenna bipectinate. Palpi slender, short, hairy. Legs moderately hairy; 
hind tibiae with short terminal spurs. Forewing: apex falcate; termen excurved below apex, inbent below vein 
3, partly crenulate; vein 2 from middle of cell; 3 near angle; 4 lower angle; 5 middle of discocellular: 6 upper 
angle; 7 and 8 stalked; 9 and 11 from cell. 10 as a short spur from 9. Hindwing: costa convex; termen crenulate, 
inbent below vein 4; vein 2 from beyond middle of cell; 3 before lower angle; 4 from angle; 5 middle of dis¬ 
cocellular; 6 upper angle; 7 from cell before angle. 
Type: L. chiridota Grt. 
L. vulfreda sp. n. (88 d). Male : Head light salmon orange. Thorax and abdomen light russet vinaceous, vulfreda. 
the latter dorsally suffused with light salmon orange on terminal half. Wings light greyish vinaceous with 
reddish suffusions near base below cell, and some scattered black scales. Forewing: a black streak and some 
white scales at discocellular; costal edge orange cinnamon; a faint vinaceous drab postmedial line almost vertical 
followed by a mineral red shade expanding from vein 6 to vein 2 and tornus. Hindwing: a faint and fine post- 
medial vinaceous drab line; termen broadly mineral red; cilia tipped with white, on forewing with pale vinaceous. 
Fore wing below vinaceous rufous from base to three-fourths with some black scales; terminal space mostly 
light greyish vinaceous. Hindwing below almost as above, the black scales more numerous, the termen more 
narrowly red. Expanse: 32 mm. Bella Vista, West Colombia. Type in Collection Niepelt. 
L. syrinx Drc. (88 d). Male : Head and collar hair brown. Thorax and abdomen light drab. Forewing syrinx. 
hair brown, markings light drab; a spot at base below cell; an antemedial wavy line, thicker on costa and inner 
margin; an oval line at discocellular; a medial spot below vein 2; a postmedial line of lunules; apical space 
broadly on costa narrowing along termen to vein 2, light drab suffused with drab at apex. Hindwing: base 
salmon buff with a large hair brown patch from cell to inner margin: medial line broad, wavy from costa to 
vein 3, then inbent to middle of inner margin, followed by a broad light drab shade cut by a hair brown line 
diverging at vein 3, the outer part reaching inner margin near anal angle; termen broadly hair brown; cilia 
tipped with light buff on interspaces. Wings below mostly chaetura drab. Forewing with a fine whitish line 
at discocellular; outer line white on costa; termen irregularly light drab from vein 8 to vein 2. Hindwing: 
base suffused with carot brown; an antemedial ochraceous salmon fascia from within cell to inner margin, 
some white on costa above it; a black spot on discocellular; a subterminal faint pale smoky grey line. Expanse: 
male, 39 mm. Costa Rica; Venezuela. 
L. briasia sp. n. (88 c). Male : Allied to syrinx. Body and wings darker, the marking less prominent, briasia. 
Underside of hindwing without the ochraceous salmon fascia; the spot on discocellular light drab grey. Expanse: 
35 mm. Buena Vista, Colombia; St. Jean, French Guiana; Rio Tapajos, Amazons. 
L. otalla Schs. (88 d). Male -. Head, collar partly, throat, and fore legs bittersweet pink. Thorax white, otalla. 
Abdomen pale cinnamon pink or suffused with pale pinkish buff. Forewing: base and inner margin to outer 
line white; costal edge bittersweet pink, costa below edge white; medial area roseate with an oblique black line 
