1944] Genus Lycxides 135 
spicuously. The same discal arc as in forewing is readily per- 
ceived, but the eye sees Rs in a more proximal position in 
relation to M 4 than R 4 appears in relation to M 1 in the forewing 
(actually, both Rs and R 4 — especially the latter — have pro- 
gressed further distad from their apices than the corresponding 
macules M 4 have progressed in their cells). Macules ScIII and 
Sell at one end and Cu 2 II at the other prolong the discal arc 
(Rs, Mj, M 2 , M 3 , Cu 4 ) in such a way as to form a horseshoe 
arrangement around cell RM: this circumcellular arc becomes 
practically a circle in some genera, where the second macule in 
cell RM (or a third one) is placed basally enough to act as a 
link. Posteriorly to this, macules Cu 2 + 1A, 2 A and 4A form 
a short weak additional arc or parenthesis (also a special fea- 
ture in certain other genera) with its concavity toward the 
proximal stretch of vein Cu. The radianal slant connects mac- 
ules ScIII, RM, Cui (when lagging) the colon (its 1A part, 
however, generally “diverges basad”) and the semimacule in 
2A by a regular but perfectly imaginary line, traversing the 
wing and very conspicuous and perfect in butterflies where the 
anal part of the termen has been stretched tailwise. 
When examining Lycoenidee patterns for systematic pur- 
poses, loose impressionistic descriptions will inevitably result 
(and I have erred myself in this respect) if the describer does 
not take into account the actual distances of the macules from 
the apices of their cells and from the termen, the actual and 
comparative positions of the split first macules, the extension of 
the split in comparison to the whole wing, the development of 
the terminal space, and the relation between the size of the 
macules and the entire number of scale-lines. I shall limit my- 
self here to a few words regarding the dimensions of macules in 
this genus. 
Divided by three, the sum of scale lines occupied by the three 
median macules II in a specimen gives pretty exactly the mean 
size of the whole discal maculation in that specimen. When the 
relation of this number to the alar expanse in scale-lines (see 
category I) is around 1/20 for each wing, the maculation in the 
specimen or in the race may be said to be of “average” develop- 
ment in both wings. Below this, it is “reduced”; above, it is “en- 
larged.” In the forewing macule M 1 is often equal to M 2 but their 
elongation and direction may be different. R 4 is smaller than M 4 
and both tend to be ovoids slanted towards the wing apex, these 
