170 THE ENTOMOLOGIST. 
colour are embraced, and it is the object of this paper to classify 
these conditions, and to give greater precision to the use of the 
word. 
Variations in the colour of Lepidoptera either from the 
normal type, or in the case of polymorphic species, from each 
other, may be placed under at least twelve different classes, and 
the table following will show the divisions under which I propose 
to deal with the subject. 
TABLE OF VARIATIONS IN THE CoLouR OF LEPIDOPTERA. 
Aberrations, or Heteromorphism.—White: Albinism. Pallid: 
Xanthism. Black: Melanism. Sports: Heteropecilism. Fe- 
males coloured as males: Gynandrochromism. Both sexes in 
one individual: Hermaphroditism. 
Constant Variations, or Orthopeecilism.—Variable species : 
Polymorphism. Local variations: Topomorphism. Reversion: 
Atavism. ‘Two static conditions: Dimorphism. Three static 
conditions: Trimorphism. Seasonal variation: Horeomorphism. 
Tt will be seen from the table above that I divide the twelve 
classes into two sections, six classes in each. The first includes 
mere aberrations, and the second variations of constant occur- 
rence. ‘l’o the first section I give the name of Heteromorphism, 
and to the second that of Orthopeecilism. 
The six heteromorphic variations are more of the nature of 
what gardeners call “sports,” and in the natural state do not, as 
a rule, form permanent varieties or races, although by careful 
selection in confinement some of them may be perpetuated. 
The six orthopeecilic variations are of constant occurrence, 
and in a state of nature form permanent variations either of 
a local, seasonal, or other character. 
T do not contend that these twelve classes are sharply separated 
from each other, but, on the contrary, there are some variations 
to be met with that might with ae propriety be placed in more 
than one of the classes. 
I shall now consider the twelve classes separately :— 
AtBINIsM.—A pure albino amongst the Lepidoptera is very 
rare, and my cabinet contains but one specimen, viz., Husebia 
bipunctaria. This remarkable specimen I took myself at Lewes. 
The only other albinos I have seen were captured in the Island 
of Lewis, in the Outer Hebrides. ‘They were so frequently met 
