294 MR. A. G. RUTLER ON A NEW rosst mMoTH. [May 21, 
Thaites appear to me to be somewhat doubtful, Mr. Scudder’s figure, 
if a facsimile of the original, might with less ingenuity be modified 
into a form of Casfnia than into a Parnassius or Thais. 
As it is probable that the colouring of flowers began to develop 
prior to that of the insects which frequented them, it seems not un- 
likely that the appreciation of colour shown by Lepidoptera was 
gained by associating certain tints with their favourite flowers, and 
once acquired became unconsciously a consideration in the selection 
of mates: thus we find that in the Arctic regions, where bright 
flowers do not form a feature of the landscape, the Lepidoptera are 
duil-coloured, their sense of colour being naturally dormant’. 
LITHOPSYCHE, gen. nov. 
Nearest to Calospila and Cruspedosis ; resembling Craspedosis 
extenuata of ‘Timor most nearly in the size and form of the pri- 
maries, and Huschema minervaria of Burma in the form of all the 
wings, though differmg much in colouring; but in the pattern of 
these wings much more like the less nearly related Pre@sos mariana ; 
venation, so far as it can be followed, closely resembling that of 
Calospila leucomela ; the secondaries differing in form, the abdo- 
minal margin being longer, as in the males of Luschema proba and 
other allied greyish-blue species; the abdomen extends to about 
four fifths of the length of the secondaries and terminates in a small 
tuft-like fringe as in females of Euschema ; the thorax is represented 
by a deep impression showing the divisions distinctly. 
LirHopsyCHE ANTIQUA, sp. n. (Plate XXXI. figs. 3, 6.) 
Apparently originally black and white, the black having changed 
to a brown-umber, as in a faded example of Calospila picaria in the 
Museum; primaries with a white spot in the cell as in Bracca 
bajularia (Plate XXXI. fig. 1); a macular white oblique band just 
beyond the middle, probably represented by the abbreviated band of 
Calospila posthumaria, the less oblique and complete band of 
Craspedosis ernestina, and the broader autemedian band of Presos ; 
three spots placed obliquely about halfway between this band and 
the apex and two nearer to the outer margin on the median inter- 
spaces, as in Presos mariana (Plate XXXI. fig. 4), also a bifid spot 
sull nearer to the outer margin on the interno-median interspace ; 
the secondaries, which are tor the greater part concealed by the 
primaries, show the lower portion of a narrow white postmedian 
band, sinuated internally and possibly macular as in Calospila post- 
humaria. 
Gurnet Bay, Isle of Wight (Mr. B. J. A’ Court Smith). 
The type specimen is in the Geological collection of the Natural 
History Museum. 
Of the genera immediately allied to Lithopsyche, the Museum 
collection contains examples of the following species :— 
* I do not mean to say that there are no bright-coloured Arctic flowers; but 
they are not such as, from their size and abundance, would arrest the attention 
of any but a trained mind. 
