NOVITATES ZOOLOGICAE XXII. 1913. 99 



hind-margin (figs. 5 and 6) than in bulis. The varied intensity of the markings and 

 the great range in wing form do not make this always self-evident. 



The appendages difier from those of bulis chiefly in the aedeagus, which is 

 2'0 to 2-2 mm. long (bulis, 30 mm.), straight, and somewhat expanded towards its 

 distal extremity. The actual extremity is much narrower than in bulis, almost 

 pointed, and therefore carries only a few spines, which are more numerous down 

 the margin. 



The harpe varies as in bulis ; in the paracuta form it is generally rather 

 sharp ; in the Indian forms it is blnnt, and may be broad and tending to duplica- 

 tion at the end. 



This is the only definite character in the appendages by which I could define 

 paracuta from acuta, and the variation in acuta in this matter is so considerable 

 that it does not seem to be a satisfactory character for the purpose. 



The distribution of acuta seems to be North-West India, Nepal, Darjeeling, 

 Bnrmah, Hainan, Upper Meku, Tenasserim ; oi paracuta, Japan, Formosa, China. 



The pale patches in ? acuta are white, with a bluish aspect most pronounced 

 in paracuta ; in bulis ¥ they are brown. 



11. Curetis sperthis Felder. 



sjieHhis, Felder, Reise Novara, Lep. p. 222 (18G5). 



aesopus, auct. pars, nee Fabr, (see discussion nnier phaedrua). 



Ou-retis mhiiina, Distant and Pryer, Amt. Mag. N, H, (5). xix. p. 265 (1887). Description agrees 



with specimen in Tring collection labelled " inhiima D. and P." " North Borneo " — which is 



either a type or a paratype. 



Comparing these specimens with the type of sperthis, and accejiting a specimen 

 in the Tring collection which agrees absolutely with the type specimen for the 

 examination of the appendages, shows all these named forms to be one species. 



The figure of a male in Distaut's lihop. Mala;/, pi. .xxiv. fig. 12 (called aesopus) 

 is ajjparently the species under review, presenting — what is a characteristic of the 

 species— the abundant irroration of the underside with black jioints, though the 

 fasciae are rather too much in the bulis pattern. 



The ? of aesopus is possibly that species (viz. phaedrus), but has nothing in 

 that case to do with sperthis {I.e. pi. xxiv. fig. 12), nor probably does pi. xxii. 

 fig. 27 represent the ? of sperthis, though so named. 



I have not with certainty recognised the ¥ of sperthis. C. sperthis is a smaller 

 nsect than hulls or acuta, and in the form minima is the smallest form of Curetis. 

 It may be distinguished from bulis and acuta by the underside band being rather of 

 the lunulated thetis type, than of that of bulis, and by the underside being more 

 frequently thickly irrorated with fine black points.* These are seen in the 



* The black irroration beneath is a character of the B. (hiilis) section ; it is more frequently present 

 in sjierthis than in the other species, but it may be absent in sperthis, and is often present in hulls and still 

 more in some forms of acuta. 



