1898.] L. de Niceville — List of the Butterflies of the Ke Isles. 265 



of the genus Nacaduba, being dark dull purple, with a narrow external 

 black border. The female on the npperside is dull plumbeous, not dull 

 purple like the male. The markings on the underside are more similar 

 to those of the geuus Zizera than to those of auy other genus known to 

 us. It has no tails. The neuration differs from both the above-named 

 genera in that the first subcostal nervule is entirely separated from the 

 costal nervure in the forewing. It has a near relation in " Lycsena " 

 mserens, Rosenstock, from tropical Northern Australia, but the male of 

 that species has the wings narrower, the apex of the forewing more 

 acute, and the outer margin straighter, the ground-colour of both wings 

 on the underside darker, and all the markings consequently less promi- 

 nent. Lycsena m sevens has been placed by Messrs. Anderson and Spry 

 in "Victorian Butterflies," p. 92, woodcut of male (1894), in the genus 

 Holochila. 



53. Pseudodipsas ilias, Felder. 



Decidedly rare on Little and Great K6 Isles. Our specimens agree 

 very well with "Holochila" intensa, Butler, from the Aru Isles and 

 New Guinea. Unfortunately the description is not comparative with 

 P. ilias. It has a very quick flight, and sits in the hot sun on the tops 

 of certain bushes with rounded leaves. Rober records it from Key as 

 Philiris (n. g.) ilias, Felder. But " Thecla" ilias appears to be conge- 

 neric with Pseudodipsas eone, Felder (1860), the type of the genus 

 Pseudodipsas, so Philiris would appear to fall to Pseudodipsas. The 

 genus Holochila, Felder (]862), cannot stand, being preoccupied in 

 Mammals, and Erina (1832-33), Swainson, cannot be used, as it is 

 based on the typical species, " Papilio " erinus, Fabricius, from Aus- 

 tralia. Polycyma, Scott (1890), appears on plate xii of Scott's "Aus- 

 tralian Lepidoptera " for Polycyma carythse, itself a synonym of Papilio 

 erinus, and is a year older than Rober's name Philiris. All these 

 names appear to be synonymous with Pseudodipsas. The genus Ganda- 

 lides, Hiibner (1816), type Rusticas Adolescens xanthospilos, Hiibner, is 

 perhaps the oldest name for this group of butterflies. 



54. Thtsonitis triopus, de Niceville, n. sp. 

 Habitat : Great and Little Ke Islands. 



Expanse : <J , 1-8 to 2'0 ; $ , 2*0 inches. 



Description : Female. Nearest to T. apollonius, Felder, var. supous, 

 H. H. Druce and Bethune-Baker, Proc. Zool. Soc. Lond., 1893, p. 542, 

 pi. xlv, fig. 7, female, from Wammo Dobbo in the Aru Isles ; differs in 

 being '4 of an inch greater in alar expanse; and the upperside of 



