95 



black-tipped antennae, large and confluent spots of hind wings, 

 <fec., but more material is necessary to satisfactorily determine the 

 limits of variation of these species. Barrier Range, North-West 

 Australia ; two specimens (Coll. Macloay). 



Hydrusa chlorometis, Meyr. 



I have not seen a type of this species, but from the description 

 it appears to be very distinct, belonging to the group in which con- 

 necting spot between fourth and fifth is fully developed, and 

 characterised by the ochreous-yellow spots on patagia and thorax. 



The type specimen was taken by Mr. Meyrick at Glen Innes, 

 New South Wales, in December. 



Hydrusa stelotis, Meyr. 

 I have only seen the types, which appear very distinct. 

 Cooktown (Macleay Museum). 



Hydrusa pyrrhodera Meyr. PI. v., fig. 14. 

 Thursday Island, Cape York, Cooktown, and Cairns, Queens- 

 land. The Queensland Museum contains a large series from the 

 last-named locality. 



Hydrusa hyalota, Meyr. 



Cape York, Queensland ; one specimen each in the Macleay 

 collection and that of the Queensland Museum. Fresh specimens 

 are required to establish with certainty its distinctness from the 

 preceding. 



Hydrusa leucacma, Meyr. PI. v., fig. 9. 



There are five male specimens of this species in Coll. Lucas. It 

 closely resembles some forms of the following species in the fore- 

 wings and thorax ; but may be readily distinguished by the 

 obsolescence of basal spot of hind wings, and complete blackness 

 of three apical abdominal segments including anal tuft. There 

 are five orange markings on dorsal surface of abdomen of male. 



Cairns, Queensland. 



Hydrusa aperta. Walk. PI. v., figs. 1-6 and 8. 



Syntomis aperta, Walk., Suppl. 72, Meyr., I.e., 134.; Hydrusa 

 jjyrocoma, Meyr., 127; //. synedra, Meyr., 128; H. hesperitis, 

 Meyr., 129; B. mochlotis, Meyr., 132; H. nesothetis, Meyr., 133. 



The distinguishing features of this species are the large size, 33- 

 48 mm. (but dwarfed specimens also occur), the black antennse, the 

 broadly orange head, the conspicuous yellow posterior thoracic 

 spot, the seven orange bars on the abdomen of male, six in 

 female (the last two of these may be reduced in size, or nearly 

 obsolete), the very elongate fourth spot of forewings, and the 

 well-developed basal spot of hindwings. 



