1944] Genus Lycaeides 125 
of each prseterminal mark of hindwing underside; tending to 
be gradually reduced from M 3 or M 2 costad, and often lacking 
in the anterior interspaces, but seldom missing in the posterior 
ones; very poorly developed in some forms but only individually 
quite absent; in most cases placed rather proximally upon the 
mark, i.e., not reaching its distal limit, so that the latter spreads 
out beardlike from underneath the scintillant incrustation, if 
viewed from the termen; (the following more individual than 
racial variations in position are to be noted since any one of 
them can be stabilized specifically in other genera) sometimes 
coming in complete contact with the aurora ( q.v .), but often 
well separated from it by a tendency to occupy a median, or 
even distal, position within the mark; sometimes absent from a 
more or less conspicuous point in the center (upon the inter- 
neural fold) which thus forms a blackish pupil; in some cases 
agglomerating band-like across the mark; or distributed un- 
evenly, with patches and dots of black showing at different 
points; but in a few cases overlaying the mark completely (with 
or without a pupil), or, as it were, overlapping or replacing it 
in cases when the pigment of the mark tends to obsolescence or 
is quite gone; in shade varying (racially, inasmuch as the 
pigmentation varies racially) to the naked eye from turquoise 
(in poorly pigmented forms) through peacock blue (at an aver- 
age or reduced development in well-pigmented forms) to golden 
green (when completely overlaying a strongly pigmented mark), 
but hardly distinguishable from the scintillant pul vis under lens 
(both sets of scales being turquoise), the aforesaid variations in 
color depending on the angle of light, the compactness of scales, 
the pigmental basis and frame — and a subjective approach on 
the part of the observer. 
VI. Hair scales (and androconial scales) 
1. Hair scales of forewing, in male: very short, white, bluish, 
or pale violet blue (according to light) ; of a bristly appearance 
under lens; projecting distad (apically and tornad when paired 
on a radial vein, on each of which they may form a sequence of 
basally pointed arrowheads) and sparsely to rather densely dis- 
tributed (more or less distally) within cell RM and throughout 
the circumcellular area distad, lacking at the base of its posterior 
Glaucopsyche, Lyccena, and Tomares, and which subsequently had disappeared, 
leaving the scintillae as seapools are left by the sea at low tide. 
