98 



Barrier Range, North- West Australia ; two specimens 

 (Coll. Macleay). The British Museum type is stated to be from 

 North Australia. I have two specimens from Brisbane and 

 Stradbrooke Island, and have seen others, which differ from the 

 types in spots of hindwings being separate ; for the present I 

 include them in the present species. 



Hydrusa orphn^a, n. sp. 



Male and female 24-27 mm. Head broadly black on crown^ 

 collar yellow. Face black in male, in female mixed with ochreous. 

 Antennae black to apex. Thorax black. Abdomen with hairy 

 yellow scales, bases of segments black. Forewings black without 

 iridescence, thinly scaled ; spots moderate, pale orange, semitrans- 

 parent ; first, small, subquadrate ; second, larger, bluntly wedge- 

 shaped ; third, nearly triangular, anterior angle produced towards 

 second, and truncate ; fourth, elongate, surmounted by a small 

 dot, connecting spot absent ; fifth, roundish, bisected by a black 

 vein. Hindwings, basal spot rather larger, irregularly outlined, 

 unequally divided by a fine black vein ; distal spot well developed, 

 upper segment nearly as large as lower. 



Readily distinguished by the hairy abdomen and the scantily- 

 clothed forewings, which give the species a very distinct 

 appearance. The black face of the male is a very marked 

 character, but may not be constant. The male is broader winged. 



Ballandean, Queensland, and Tenterfield, New South Wales^ 

 three specimens in February. 



Hydrusa annulata, Fah. 



Zygaena annulata, F.E.S., 389 ; Syntomis mmulata, Boisd. 

 Zyg. 122, pi. vii., 8, pi. viii., 2 ; Hydrusa cingulaia, Butl., Journ. 

 Linn. Soc. 1876, 352 ; H. 7iigriceps, ib. 352 ; S. intensa, ib. 353, 

 Meyr. I.e. 136. 



The earlier synomymy is taken from Meyrick's paper. I have 

 read Butler's descriptions and do not find in them any tangible 

 points of distinction. His Hydrusa intensa is recognised by 

 Meyrick, but the point of distinction ^iven by the latter is unten- 

 able. I have taken every gradation from nearly complete 

 absence to considerable development of upper section of distal 

 spot of hindwings on the same day under circumstances which 

 left no doubt as to specific identity. 



Varieties. — A very constant form in its markings. In Bris- 

 bane the males are slightly larger and broader-winged than the 

 females, in specimens from Ballandean and Tenterfield the dis- 

 parity is much more marked. The anal tuft of the male, 

 normally wholly orange, is sometimes black at the sides, as in 

 H. phepsalotis. In forewings the fourth spot is rarely surmounted 



