222 Dr. T. A. Chapman’s 
large form; if it is a variety of anything, it is a variety 
of L. mnestra. The clasp does not altogether negative 
such a hypothesis; indeed, it rather suggests it. EH. gorgone 
has a clasp triflingly larger than in #. muestra; the neck 
is a little longer, but with no approach to the great length 
in gorge. The styles range further along the body, and 
these styles on the body are stronger than those in 
mnestra; the lobe is narrower and has fewer and much 
larger styles than in mmnestra, and therefore looks more 
long and pointed than in that species. But in all these 
respects it is separate from #. muestra only in a degree, 
and that so small, that I should expect to meet with 
forms very like it indeed in a long series of muestra, 
these all being points in which mnestra is very variable. 
3. £. gorge (Fig. 21). In £. gorge and 
glacialis there are no styles to the basal side of the lobe, 
and the styles are large. #. gorge is smaller, but the 
lobe and head are proportionally much longer. £. triopes 
is identical. 
4. H. glacialis (Fig. 22). The clasp is very 
like that of Z gorge, but is much larger and bolder, with 
shorter lobe and neck. 
The average dimensions of these clasps in millimetres 
are as follows: 
Length of Length of 
Clasp. Head and Neck. Proportion. 
Minestrae . ee 168 28 “16 
Go1ngone 2 Zell “44 2] 
GOR 6 a 5 He “84 34 
Glacialis’ 1. 92:8 ‘8 28 
b. The probable relation of this portion of 
the group to the preceding is very evident when the 
clasp of EH. ottomana is compared with those of division 
a; it is not so apparent when that of #. tyndarus 1s 
compared, still less so if the American form callias is con- 
sidered. The whole group consists of #. tyndarus and its 
recognised varieties, of which otfomana seems to me to 
merit specific recognition, and the American form callias 
almost to do so. 
1. £. ottomana (Fig. 23). In this we have 
a well-developed form that enables us more easily to 
understand the others. The clasp of ottomana may be 
