282 Mr. G. T. Bethune-Baker on 



the food plant or upon its stems. The larvae feed chiefly 

 upon Zoranthus pendidus, and are onisciform, broadened 

 and flattened at the anal segments and with a dorsal ridge ; 

 the general colour is dark fulvous paler along the ridge 

 with a series of oblique (? lateral) stripes ; on the tenth 

 segment is a black irregular diamond-shaped patch pupilled 

 with greyish-white, the last segment having a dark T- 

 shaped mark, the spiracles are white encircled with black, 

 the surface generally being rugose and punctated with 

 minute bristles, with a subspiracular series of short bristles. 

 The larval state is said to last for some months and to be 

 delicate and difficult to rear ; ants are always with them, 

 and whilst they appear to be free from attacks of insect 

 parasites, a fungoid disease at times kills large numbers 

 of them. When full grown the larva measures from 20 

 to 25 mm. 



Ogyris ianthis, Waterhouse. 



0. ianthis, Waterhouse, P. L. S., N.S.W., pp. 52-54, 

 pi. I, figs. 1-4, 1900 ; id. idem, p. 341, 1902; id. p. 247, 

 1903; Mem. N.S.W. Nat. Club, No. 1, p. 29, 1903. 



This species can readily be recognized from Water- 

 house's description and from its rich orange-chrome- 

 coloured female ; it is apparently confined to the neigh- 

 bourhood of Sydney. The ova are pale pinkish in colour, 

 in shape they are flattened somewhat at the top, and 

 reticulated all over. The larva, which hides at some depth 

 in ants' nests during the day, does not move until night, and 

 feeds on Lorantlvus eclastroides in the dark, always making 

 for a dark corner should a light be turned on it ; it is 

 pinkish-brown with a much darker dorsal line and paler 

 lateral bands, one on each segment ; the under-side is pale 

 cream colour. The pupa is reddish-brown of the usual 

 shape. I find that the organs on the last segment but one 

 through which the fluid so greedily sucked by ants is 

 passed are very marked in this species. I have a young 

 larva in formalin now in front of me, and I notice that 

 these organs (a pair) are situated on each side of the 

 dorsum, and consist of a prominent tubercle shagreened all 

 over, with a deep orifice in the centre from which the 

 retractile tube is everted or withdrawn at will ; when at 

 rest the tube is contracted, and is apparently only emitted 

 when the larva is induced to do so. 



