1892.] LEPIDOPTERA FROM SANDAKAN. 121 



wallaceana tf, Butl., Narathura pryeri, n. sp. 1 , N. achelous $> var., 

 Hew., Papilio prexaspes, Feld., P. evemon, Bdv., P. telephus, Feld., 

 P. \bathycles, Zinck., P. arycles, Boisd., P. agamemnon, Linn., 

 Astictopterus sindu, Feld. 



HETEROCERA. 



Amongst these are several beautiful new insects, as well as others 

 which are by no means abundant in collections. No Sphingidce are 

 represented, but there is a lovely new Zygcenoid Arctiid. 



CHALCOSIID.E. 



MlLLERIA FICTA. 



Cyclosia ficta, Walker, Journ. Linn. Soc. vi. p. 97 (1862). 



Milleria pontioides, Butler, Ann. & Mag. Nat. Hist. ser. 5, 

 vol. vii. p. 35 (1881). 



Walker's description of this species is so bad that without exam- 

 ining the type it would be quite impossible to guess at its identity 

 with M. pontioides. 



CALLAMESIA STRIATA. 



Amesia striata, Druce, Ann. & Mag. Nat. Hist. ser. 6, vol. vii. 

 p. 142(1891). 



This species appears to be allied to C. submaculans of Walker 

 (Journ. Linn. Soc. iii. p. 185, 1860). I have to thank Mr. Druce 

 for identifying it for me as his species. 



CHALCOSIA I^DISTINCTA. 



Chalcosia indistincta, Swinhoe, in litt. 



One imperfect female. 



ARCTIIDJS. 

 MYDROTHAUMA, n. gen. 



Nearest to Eupyra, the primaries a little narrower, the subcostal 

 branches emitted regularly from the cell instead of branching off 

 from the main nervure ; the second and third median branches 

 wider apart at their origins ; the secondaries with strongly arched 

 costal margins ; three instead of two median branches ; palpi 

 extremely short and porrected, instead of very long and almost 

 erect ; tibial spurs also very short ; abdomen much broader, 

 flattened and tufted at the sides. From Mydrodoxa, to which it is 

 also allied, it differs in its considerably narrower primaries with 

 sinuous instead of arched inner margin ; in the important point of 



1 Differs from N. amphimuta, to which it is allied and which it nearly re- 

 sembles on the under surface, in its much inferior size and in the deep glistening 

 ultramarine (rather than violet) blue colouring of the upper surface ; the 

 female, which is in the B.M. from Sarawak, has a much more restricted 

 blue area, especially on the secondaries: expanse of wings, <$ 43 millim., 

 2 40 millim. 



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