204 THE VICTORIAN NATURALIST. 



paler on the underneath part, but having regard to its environ- 

 ments it will probably be more rusty-coloured than the females of 

 the other known members of its genus. 

 Dimensions in inches : — 



Length. Culmen. Wing. Tail. Tarsus. 



NOTES ON A RARE VICTORIAN MOTH, MOCHLO- 

 TONA PHASMATIAS, Meyr. 



By J as. A. Kershaw, F.E.S. 



{Read before the Field Naturalists' Club of Victoria, 11th March, 1901.) 



This species, which is one of the rarest of our Geometers, and is 

 included in the family Selidosemidae, was described by Mr. E. 

 Meyrick, F.E.S. , in the Proc. Linn. Soc. N.S.W., p. 673, 1891, 

 from a single specimen collected by Dr. T. P. Lucas at Warragul, 

 Gippsland, Victoria. 



Owing to the marked difference in neuration from its nearest 

 allies, Mr. Meyrick decided to form a new genus for its reception, 

 and up to the present time this is the only species known. 



Although fully ten years have elapsed since the first specimen 

 was taken, I do not know of any ether specimens having been 

 collected, excepting those taken by myself some years ago at 

 Narracan, Gippsland, and a single specimen which I recently 

 saw in the collection at the Australian Museum, Sydney, and 

 which was taken at Warra, New South Wales. 



On two or three occasions when collecting in Gippsland I was 

 fortunate not only in capturing several fine specimens, but in 

 taking a single larva from which I successfully reared a male. 

 The specimen described by Meyrick was unfortunately a female, 

 so that he was unable to give one or two important characters 

 only found in the male. These I am now able to supply, and 

 as my specimens differ somewhat from the description given by 

 Meyrick, besides in two or three instances showing considerable 

 variation both in markings and extent of colouring in both upper 

 and lower wings, I have thought it desirable to give a fall de- 

 scription of both the typical form and the variety. In addition I 

 give a detailed description of the larva and pupa. 



Examples of the specimens here described have been placed 

 in the collection of the National Museum, Melbourne. 



In justice to Mr. Meyrick I must state that on forwarding a 

 specimen to him he readily identified it as the male of his type, 

 and it is partly at his suggestion that I give the following details. 



Male. — 56 mm. Head and thorax greyish with a few black 



