18 
PAPILIONIDM. 
last species, is generally absent in P. Delius, male. The hind wings 
are white, without any trace of a wavy band. The red spots are 
smaller than in Apollo, and more often without than with white 
centres. The spots near the anal angle on the under side are very 
small and reduced to one or two, and at the most but slightly 
apparent on the upper surface. The dusky hind marginal patch of 
the hind wings is darker and more concentrated than in Apollo. 
Both sexes have four red basal spots on the under side of the hind 
wings. The female is much more dusky and more strongly marked 
than the male. It has the hind marginal spot on the fore wings 
well defined, and sometimes has the wavy dark band on the hind 
wings that is found in both sexes of Apollo. The abdominal pouch 
is small, and the abdomen is hairy. PL IV., 2. 
Times of Appeakance. — July to September. 
Habitat. — The Alps of Europe and Northern and Central 
Asia. This species is much more local and scarcer than D. Apollo ; 
it also inhabits more elevated regions. It may be found, for 
instance, in mountain gorges in the higher Alps of Switzerland, 
but not in the lower valleys, where P. Apollo is common. I have 
always taken it in very moist situations. 
Lakva.— I am very pleased to be able to take advantage of a 
notice by Zeller in the ‘ Stettiner Entomologische Zeitiing’ of the 
earlier stages of this insect, which have hitherto been undescribed 
by other observers. In the above-mentioned journal for 1875 he 
says that the Butterflies suck the flowers of Saxifraga aizoides ; 
they are to be seen near springs and damp places, where this plant 
is common. Pie considers that there is some foundation for the 
suggestion that the larva lives in water during some portion of its 
existence, as he found Butterflies that had but newly emerged and 
never flown settling on plants of the Saxifrage growing in the 
middle of water. On the 19th of July he found the larva on very 
wet soil feeding on Saxifraga aizoides, and resting exposed upon it. 
The pupa he found lying on the surface of the ground, whence he 
thought it had been disturbed l)y the feet of cattle. In captivity 
the larva underwent their transformation beneath a fresh sod in a 
corner of the box. The ])upa resembles that of P. Apollo in shape 
and colour. The larva when full grown resembles that of D. Apollo 
