194 FAUNA SIMALURENSIS : 



According to the external morphological characteristics, 

 viz. the pattern, size, colour, the density of the squamae 

 on the fore-wings and the size of the fenestrae, I could 

 divide this material into six groups. 



On Western Java seem to live two species; on Sumatra 

 also two; on Nias two; on Celebes one; on Biliton one 

 and on Borneo one. 



As to the catalogue of Kirby (pag. 568), that of the 

 British Museum (pag. 86), Dr. K. Jordan in „Die Gross- 

 schmetterlinge der Erde" von Seitz (pag. 108) and the 

 „Genera Insectorum" of Wytsman (Lept ocir cinae), the 

 number of species or varieties is not exactly known. Kirby 

 accepts one species {Lept. curius Fabr.) followed by five 

 varieties {virescens Butl., emiiiis Feld., Wilsomi Reak, 

 deems Feld. and meges Zinck.). In the catalogue of the 

 British Museum we find three species {curius^ meges and 

 corion G. R. Gray). Last not least Wytsman likes to accept 

 in this genus six species „par la constitution des ailes 

 antérieures." ! Dr. Jordan is right, describing two species: 

 curius Fabr. and meges Zinck. 



It is well known that the claw of Leptocircus curius is 

 bifid, that of Lepd. meges simple. This characteristic, 

 together with the presence or absence of smell-hairs in 

 the males, is important enough to call it specific, but as 

 I liked to have some more certainty, I have made a pre- 

 parate of the male genitalia of both species. Moreover 

 there must be a criterium for the other forms of Lepto- 

 circus and I have prepared also the male genitalia of 

 Lept. ennius Feld. (from Celebes) and of the variety of 

 Nias, Lept. lihelluloides Fruhst. 



The results of these researches were, that curius and 

 meges are very easy to distinguish by the harpae and by 

 the penis. The annulus has an oral processus, which also 

 differs in the two species. The figures on the next page 

 will explain the differences more clearly. 



Lepd. ennius^ which I thought to be also a real species, 

 is a variety of meges Zinck., only found on Celebes ; Lept. 

 lihelluloides is a local variety of Lept. curius from the 



Note» from tlie Leyden Museum, Vol. XXXV. 



