1944 ] Genus Lycceides 137 
of the macules in Cu 2 II and 1AII and often slightly diverted 
anteriorly and outwardly from the scale-line of its axis. Mac- 
ule M in the discoidal cell is intermediate in size between ScIII 
and Cu 2 III while the latter is intermediate between M and 4A 
which is the smallest of all. In a general way, and taking ac- 
count of their tendencies, the sequence in size of the macules is 
as follows: 4A, Cu 2 III, M, M 3 , ScIII, M l7 M 2 , Cu x , Rs, Sell. 
The sequence for the rheniform macules (length) is: 2 A, 
Cu 2 + 1A, RM. These sequences are important as they give 
the order in which macules in both wings tend to disappear in 
some races. Their reduction (racial) in one wing, however, is 
not necessarily accompanied by reduction in the macules of the 
other, nor do the rest of the markings and the general pigmenta- 
tion always follow suit. 
In conclusion a few words may be said concerning the 
specific repetition, rhythm, scope, and expression of the generic 
characters supplied by the eight categories discussed. “Repeti- 
tion” when affecting a conspicuous character or a great number 
of characters, produces striking resemblances between certain 
forms (which may be widely allopatric and associated with 
totally different surroundings) belonging to two or more dif- 
ferent species of Lycceides , and this kind of resemblance I term 
homopsis since I cannot use “isomorphism,” (the mimetic im- 
plications of which would be quite irrelevant in the case of this 
genus), or “parallelism” (which I restrict to resemblances in 
structural characters), or “analogy” (which is a minor form of 
homopsis affecting allopatric races of the same species) ; inter- 
specific homopsis to be precise — for remarkable homoptic 
forms may be also supplied by generically and tribally different 
Lycsenids. “Rhythm” depends on the following: if B, L, P, T 
represent in one species of Lycceides certain combinations of 
characters as revealed by definite subspecies, and if in another 
species the combination L fails to be represented at all, while 
on the other hand P is not represented by a single definite sub- 
species, but is spread over several, these omissions, gaps, fusions, 
and syncopatic jerks will produce in one species a variational 
rhythm different from that of another. “Scope” refers to range 
of variation in a species in comparison to that of another species 
and in its approach towards the generic range. A species may 
set a unique record in one character or category, while lagging 
