102 THE PROMINENT MOTHS OF BUCKINGHAMSHIRE. 
11. Notodonta dromedarius (the Iron-coloured or Dromedary 
Prominent), the latter appellation being derived from the won- 
derfully humpy appearance of the eaterpillar,—resembles the 
Carmelite Prominent in colour, but is of a much darker shade. 
The upper wings (the rusty brown tint of which varies a good 
deal in intensity) are more or less marbled with yellow. The 
caterpillar, which is one of the most singular looking creatures in 
the insect creation, is bright yellowish-green, more or less saddled 
on the back with purplish-brown. It has no less than five humps 
on its back, and rests like the larva of the Maple Prominent with 
its tail in the air. It feeds in September on birch and alder, and 
occasionally on hazel. I have several times taken it in this 
parish. The moth appears in May, June, and July. 
12. Notodonta ziczac (the Pebble Prominent) is at once dis- 
tinguished by the conspicuous markings at the tip of the 
anterior wings, resembling the polished eye of an onyx or some 
other pebble—whence its name. It is not a very uncommon 
species. Its singular brown and purple larva resembles the 
larva of dromedarius in form but has two humps less. — It feeds 
upon all kinds of poplar and sallow in September and October. 
The moth appears in May and June. It occurs all over the 
county. 
13. Wotodonta trepida (the Great Prominent).—The larva of 
this magnificent moth, the king of the Prominents, I have several 
times beaten from oak trees in this neighbourhood in July. It 
is as georgeously bright as the moth is softly beautiful. The 
ground colour is the brightest apple-greon, with yellow lines on 
the back and large yellow and red stripes on the side. I know . 
nothing more exciting to an entomologist when he has spread his 
sheet under the spreading boughs of a large oak and given one 
of the branches a sharp tap with his pole, than to hear a loud 
thud on the sheet, and to see a largo fat larva of trepida lying 
sprawling on its surface. This caterpillar feeds exclusively on 
the oak and is full fed in July. The moth, which appears in 
May, has the upper wings of a uniform soft dusty green, more 
or less suffused with saffron and marbled with dark olive. It may 
