390 STMPHA.LID-E. 



Genus PENTHEMA. 



Penthema, Doubleday, in Dblday., Westiu. § Hew. Gen. Di. Lep. 

 1847, pi. 39 ; de N. Butt. Ind. ii, 1886, p. 144 ; Moore, Lep. Ind, 

 iv, 1899-1900, p. 150. 



Type, P. Jisarda, Doubleday, from Sikhiin. 



Range. N.E. India ; Assam ; Burma ; Tenasserim ; China. 



(5 2 • Fore wing : costa well-arched ; apex slightly produced, 

 broadly rounded ; termen oblique, very slightly concave in the 

 middle ; tornus blunt, dorsum straight ; cell not half length of 

 wing ; upper and middle discocellulars erect, short, lower oblique, 

 longer than the upper and middle together ; vein 3 from well 

 before lower apex of cell, 4 from apex, 8 and 9 from apical half 

 of 7, 10 and 11 free ; 10 running approximate to 7 for basal half 

 of its length, but not touching or anastomosed with it. Hind 

 wing : costa widely arched, termen strongly curved, tornus 

 rounded ; dorsum straight, slightly emarginate above tornus ; cell 

 closed, short, not nearly half length of wing ; veins 3 and 4 from 

 lower apex of cell ; precostal vein strongly curved inwards. 

 Antennae about half length of fore wing, filiform ; club very 

 narrow and long, barely thicker than the stalks of the antennae ; 

 palpi somewhat clavate, broadening upwards to base of third joint, 

 this latter short, attenuated, acute at apex ; eyes naked. 



I have followed Messrs. de Niceville and Moore in keeping the 

 three Indian forms separate, but they are all very closely related. 

 P. darlisa, Moore, and P. binghami, Wood-Mason, are probably 

 races of the typical form. 



Key to the forms of Penthema. 



a. Hind wing : cell entirely white P. lisarda, p. 390. 



b. Hind wing : cell bluish black, with two 



longitudinal white streaks near apex .... P. darlisa, p. 391. 



c. Hind wing entirely bluish black, without any 



white markings P. binghami, ]). 392. 



399. Penthema lisarda, Doubleday (Diadema), A. M. N. H. (1) xvi 

 1845, p. 233 ; de N. Butt. Ind. ii, 1886, p. 144 ; Moore, Lep 

 Ind. iv, 1899-1900, p. 15], pi. 333, figs. 1, 1 a, 1 b, tf '£. 



6 2 • Upperside brownish black, fore wing in certain lights 

 suffused with blue. Fore wing with the following white or 

 yellowish-white markings : a broad short streak at base of cell, 

 two outwardly pointed elongate spots placed somewhat obliquely 

 across middle of cell, a streak extending from base to near apex 

 in interspace 1 a, successively shorter, very broad streaks in 

 nterspaces 1, 2 and 3; a series of five much narrower streaks 

 above, placed obliquely to the costa ; a postdiscal and a subterminal 

 series of transverse spots, the former oval or rounded, in inter- 



