Cuar. XII] MOTHS. 427 
the sweet night-blowing moon-flower ; and, when dark- 
ness gathers around, we can hear, though hardly distin- 
guish amid the gloom, the humming of the powerful 
wings of innumerable hawk moths, which hover with 
their long proboscides inserted into the starry petals of 
the periwinkle. 
Conspicuous amidst these nocturnal moths is the 
richly-coloured Acherontia Satanas, one of the Singha- 
lese representatives of our Death’s-head moth, which 
utters a sharp and stridulous ery when seized. This 
sound has been conjectured to be produced by the friction 
of its thorax against the abdomen ;— Reaumur believed 
it to be caused by the rubbing of the palpi against the 
tongue. I have never been able to observe either mo- 
tion, and Mr. E. L. Layard is of opinion that the sound 
is emitted from two apertures concealed by tufts of wiry 
bristles thrown out from each side of the inferior portion 
of the thorax.! 
Moths.—Among the strictly nocturnal Lepidoptera 
are some gigantic species. Of these the cinnamon- 
eating Atlas, often attains the dimensions of nearly a 
foot in the stretch of its superior wings. It is very com- 
mon in the gardens about Colombo, and its size, and 
the transparent talc-like spots in its wings, cannot fail 
to strike even the most careless saunterer. But little 
inferior to it in size is the famed Tusseh silk moth?, 
which feeds on the country almond (Zerminalia 
catappa) and the palma Christi or Castor-oil plant; it 
1 There is another variety of the night, attracted by the lights; but 
same moth in Ceylon which closely I have not found its larve, although 
resembles it in its markings, but in that of the other species is com- 
which I have never detected the ut- mon on several widely different 
tering of this curious cry. It is plants. 
smaller than the 4, Satanas, and, 2 Antherea mylitta, Drury. 
like it, often enters dwellings at 
