On an apparently nev) Lijcamidfrom Mauritius. 219 



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

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



Measurements in mm. Length 2G'5, middle breadth 12*5. 



Bab. Kosichang and Cliantaboon, Siam. A large number 

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

 ColL) 



EXPLANATION OF PLATE X. 



Fii/. 1. Zcphronia rugidosu, var. First tergite. 



Fig. 2. Zephronia Ridleyi, sp. n. First tergite. 



Fi(j. 3. Zephronia Floiveri, sp. n. 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 copulatory forceps. 



Fig. 8. Ditto. Posterior copulatory forceps. 



Fig. 9. Zephronia rugulosa, var. Anterior copulatory forceps. 



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



Fuj. 12. Zephronia iloweri. Vulva. 



Fig. 1:5. Ditto. Walking-leg. 



Fiy. 14. Zephronia siaynensis. Anterior copulatory forceps. 



Fig. 15. Ditto. Posterior copulatory forceps. 



Fig. 10. Ditto. Vulva. 



XXX IV. — Description of an apparently new Lyccenid from 

 Mauritius. By HAMILTON H. Dkuce, F.Z.S., F.E.S. 



LlEUT.-COL. N. Manders, whilst residing in Jlauritius, 

 collected a series of a Lycaenid 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. Trimen in iiis list. At first sight I thought 

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

 the coloration of both sexes is so different from the typical 

 species of that genus (C. Webhianus, Brulle) — it is also 

 Avithout 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 upperside. 



Nacaduba Mandersi, sp. n. 



cJ. — Upperside 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 nuukings. Fore wing: 

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

 another much the same closing its end. Beyond this an 



15* 



