540 LEPIDOPTERA. 



Genus 1. OURAPTERYX. 



Antennae simple ; palpi short ; thorax broad, rather 

 smoothly covered with long loose hair-scales ; abdomen 

 more slender ; fore wings broad, pointed ; hind wings with 

 a distinct tail in the middle of the hind margin. 



We have but one species. 



1. O. sambucata, L. — Expanse 2 to 2\ inches. Fore 

 wings broad, pointed ; hind wings tailed, a brown spot on 

 each side of the tail ; general colour pale primrose-yellow 

 or yellowish-white, with slender transverse olive-yellow 

 stripes. 



Antennae of the male simple, naked, yellow in front, white 

 at the back ; palpi small, tawny ; face purple-brown, the 

 scales smoothed down, but edged above by a transverse furrow 

 close under the antennas; top of the head pale primrose- 

 yellow ; thorax broad, of the same colour, the scales upon the 

 shoulder-lappets long and loose, but lying well back ; abdo- 

 men white ; lateral tufts small ; anal tuft spreading, all 

 faintly tinged with yellow. Fore wings broad and somewhat 

 trigonate ; costa nearly straight, but arched toward the apex, 

 which is sharply angulated ; hind margin below it faintly 

 hollowed and thence rather straight and oblique ; anal angle 

 well formed ; dorsal margin a little rounded and strongly 

 ciliated ; texture very silky ; pale primrose-yellow fading to 

 white ; first and second lines rather near together and to the 

 middle of the wings, perpendicular and nearly straight, not 

 sharply defined, olive-yellow ; between them, at the end of 

 the discal cell, is a perpendicular streak of the same colour ; 

 cilia short, pale olive-yellow. Hind wings yellowish-white ; 

 long and rather narrow, the hind margin sloping off to a 

 conspicuous angulated tail, on each side of which is a small 

 fulvous spot ; down the middle of the wing is a perpendicular 

 olive-yellow line ; cilia fulvous, shading off to yellowish-white 



