109 



NEW LEPIDOPTERA-HETEROCERA FROM FORMOSA. 



By a. E. Wileman, F.E.S. 



(Continued from p. 62.) 



Mithuna arizana, sp. n. 



(? . Antennae fasciculate ; head and thorax pale brown, abdomen 

 paler. Fore wings pale brown, darker freckled ; medial line dark 

 brown, slightly oblique, interrupted above the middle ; submarginal 

 line dark brown, rather broad, much interrupted. Hind wings 

 fuscous, outer margin and fringes yellowish. 



$ . Similar to the male, but the medial line of fore wings is 

 entire ; hind wings paler than those of the male. 



Expanse, 24 millim. 



Collection number, 694. 



One example of each sex from Arizan (7500 ft.). The male 

 captured in September, 1906, and the female in August, 1908. 



ab. parva, nov. 



Smaller, the medial line of fore wings only distinct on the costa 

 and the inner margin ; the submarginal line less distinct and nearer 

 the outer margin. 



Expanse, 18-19 millim. 



Two male specimens from Kanshirei (1000 ft.), June 13th, 1906. 

 Possibly these insects may be local forms of M. quadriplaga, 

 Moore. 



Ilema tricolor, sp. n. 



Fore wings pale cinnamon-brown on basal two-thirds, blackish 

 on outer third. Hind wings creamy white, a blackish border on the 

 outer margin ; the latter is broadest towards costa, slightly indented 

 below middle, and narrowed at anal angle. Under side as above, but 

 the basal two-thirds of fore wings creamy white, and the costal mar- 

 gins of all the wings streaked with yellow. 



Expanse, 28 millim. 



Collection number, 542 a. 



One male specimen from Rantaizan (7500 ft.). May 13, 1909. 



Siccia tahcana, sp. n. 



Head and thorax white, faintly tinged with brown. Fore wings 

 white, powdered with pale brownish chiefly on costal area ; a black 

 point near base of costa and a black mark below it ; three blackish 

 spots on the costa, from the first are traces of an antemedial line, and 

 from the third a curved series of dusky dots (the second from inner 

 margin Imr-like) represent a postmedial line ; a blackisli spot at end of 

 cell, and a dot about middle of cell ; submarginal line dusky, slender, 

 with blackish dots upon it ; a blackish dot on the whitish fringes at 

 apex, and a similar one about middle. Hind wings pale fuscous. 

 Under side whitish ; fore wings clouded with fuscous ; hind wings 

 with blackish discoidal dot and a dusky band beyond. 



Expanse, 22 millim. 



