On an apparently new Lyccenid from Manritius. 219 



the V (which is continued some distance as a groove) being 

 directed towards the lower inner corner (fig. 16). 



Measurements in mm. Length 26*5, middle breadth 12*5. 



Ilab. Kosichang and Cliantaboon, Siani. A large number 

 of specimens collected by Gapt. S. S. Flower. (Brit. Mus. 

 Coll.) 



EXPLANATION OF PLATE X. 



Fiy. 1. ZepJa-cmia VKgnhsa, var. First tergite. 



Fig. 2. Zeplironia Ridleyi, sp. u. First tergite. 



Fiy. 3. Zephronia Flotveri, sp. u. First tergite, 



Fiy. 4. Zephronia siamensis, sp. n. First tergite. 



Fig. 5. Zephronia impunctuta, Pocock. First tergite. 



Figs. 6, 7. Zephronia rugulosa, sp. n. Anterior copulatorv forceps. 



Fig. 8, Ditto. Posterior copulatory forceps. 



F'ig. 9. Zephronia ruyidosa, var. Anterior copulatory forceps. 



Figs. 10, 11. Zephronia Ridleyi. Anterior copulatory forceps. 



Fig. 12. Zephronia I'loiceri. Vulva. 



Fig. 13. Ditto, Walking-leg. 



Fig. 14. Zephronia siamensis. Anterior copulatory forceps, 



Fiq. 15. Ditto. Posterior copulatory forceps, 



Fiy. 16. Ditto. Vulva, 



XXXIV. — Description of an apparently new Lyccenid from 

 Mauritius. By HAMILTON H. Druce, F,Z.S., F.EiS. 



LiEUT.-CoL. N. Manders, whilst residing in Mauritius, 

 collected a series of a Lycsenid which I am unable to determine 

 and which he has asked me to describe. It is not included in 

 Boisduval's work on the Lepidoptera of the island and is not 

 mentioned by Dr. Trimenin his list. At first sight I thought 

 it would be well placed in Dr. Butler's genus Cyclyrius, bat 

 the coloration of both sexes is so different from the typical 

 species of that genus (C. Webbianus, BruUe) — it is also 

 without the chequered cilia — that it seems to me better placed 

 amongst the tailless group of Nacaduba, some species of which 

 it much resembles on the ujiperside. 



Nacaduba Mandersi, sp. n. 



c?. — Uppcrside uniform dull violaceous blue; costal and 

 outer margins very narrowly greyish brown. Cilia paler. 

 Underside : ground-colour pale brownish grey with irregular, 

 darker, sordid-white edged spots and markings. Fore Aving : 

 an elongate spot crossing the middle of the cell, followed by 

 another much the same closing its end. Beyond this an 



15* 



