142 
Psyche 
[June- August 
in both nais and vittata, is interesting as showing a tendency 
which has become fixt in the next two forms. 
In radians (Figs. 22-28) the claspers show a strong tendency 
to a very oblique posterior margin (Fig. 23.) This resembles an 
extreme form of vittata (Fig. 16), but the obliquity is greater in 
radians. One specimen, however, (Fig. 28) is similar to both 
nais and vittata. The uncus does not differ much, if at all, from 
nais and vittata. The slight difference is found in a shorter and 
broader spear-head. The juxta has a flat, broad tip, and re- 
sembles that of the aberrant form of vittata, a form also found in 
nais. The sedoeagus shows a characteristic peculiarity in having 
multiple spines — two specimens had four spines (Fig. 22), five 
specimens had three spines (Fig. 27), and one had but two, (Fig. 
26). The callum resembles that of vittata, but the distal part is 
broader, and lacks the lateral bend, being drawn out into a 
strong spine; above this main spine are smaller ones, diminishing 
in size dorsally. In the specimen with only two spines, they are 
nearly equal, the second one abnormal in being directed post- 
eriorly. 
A. phalerata (Figs. 29-38) differs remarkably from other 
members of the group, and is unique in the form of the claspers 
and oedoeagus. The clasper is of unusually large size and exceeds 
that of the largest species of the genus, A. virgo. Individual 
variations are slight, and consist in differences in length and 
shape of the terminal projection, and in the degree of angulation 
of the upper edge; Fig. 32 shows an extreme form in which one 
angle is completely flattened out. A slight asymetry is some- 
times found between the clasps of opposite sides. The uncus 
differs from the other species in the longer and narrower spear- 
head, with evenly curved edge, and the basal portion is also 
relatively long and narrow. The juxta, seen from below (Fig. 
33), is flattened at the base while the distal part is comprest lat- 
erally more narrowly than in the other moths, so that it forms a 
keel-like projection. There is little individual variation in either 
uncus or juxta. 
The sedoeagus is distinctive. The thick, heavily chitinized 
area covers nearly the whole of the right side of the distal half, 
curving onto the ventral side and over the distal end, forming a 
