06 THE EMPEROR MOTH. 
orange in the male, and not so in the female; and 
finally, the two sexes may be determined by the 
structure of the antennee ; those of the male being 
nearly oval, and very deeply feathered or pecti- 
nated, and those of the female also pectinated, but 
so slightly as to appear setaceous. As the structure 
of the antennee is an unerring criterion by which 
the sexes are ascertained, the Phalena Pavonia 
Minor is a phenomenon in entomology ; for both 
the male and female so perfectly resemble the 
female Emperor Moth, Phalcena Pavonia Media, 
that it may be mistaken for the same species; the 
female differs in no respect from it, and the male 
only in the form of the antenne. 
Linneeus, and after him Fabricius, describes 
three varieties of Phalena Pavonia. 1. Minor. 
2. Media. 3. Major. ‘The first is the variety 
found in this country, and in the north of Europe. 
Weare informed by Latreille, that a manufactory 
of silk from the cocoons of this caterpillar has been 
established in Germany. 
Albin says, that in a specimen which he pre- 
served, the male seemed to have changed to the 
aurelia state on the 16th July, and in March 
following it emerged the perfect moth. But the 
time of their appearance depends on the pro- 
portion of heat or cold; Albin’s subject was pre- 
served from the severity of winter in a warm room. 
The usual time to find them in the caterpillar state 
