1072 The American Naturalist. [December, 
The curious abdominal legs are unique in the Lepidoptera. 
Probably they have been derived secondarily and have no 
homologues elsewhere. Dr. Chapman has endeavored to ally 
Eriocephala with the Limacodide (Eucleide). Certainly there 
are several curious and striking analogies,* but I believe that 
these families really have no affinity. This is not the place 
for a discussion of the reasons for this view and I will only 
remark that the arrangement of the sete is clearly not homol- 
ogous. 
EXPLANATION OF PLATE. 
Fig. 1. Hepialus mustelinus, Stage I, side view. a, head and 
thorax; b, one segment of abdomen ; c, a thoracic 
segment made diagrammatic and the leg sete 
omitted; d, an abdominal segment made diagram- 
matic. 
Fig. 2. Hepialus humuli, mature, a diagram of the sete. a, 
thorax ; b, an abdominal segment. 
Fig. 3. Micropteryx tet tees mature, first two thoracic and 
an abdominal segmen 
Fig. 4. Eriocephala calthella, Sa I Thé whole larva is rep- 
resented, side view, but only the sete are shown. 
The head is retracted and its outline appears by 
transparency. 
Fig. 5. A diagram of the metathoracic and abdominal sete 
of the primitive Microlepidoptera (Tineides). 
t These are (1) the retractile head, (2) the angular outline of the body section, 
ridged subdorsally and laterally and bearing sete on the ridges, (3) the presence 
“5 a series of dorsal and lateral intersegmental areas corresponding in position to 
o the largest of the depressed spaces of the Eucleide, (4) the unusual number of 
Siisti legs, on the same segments as the suckers of the Eucleidæ, especially 
in the presence of a foot on joint 5 (first abdominal segment), which bears no ap- 
pendage in any other Lepidopterous family than these two, and is also apodal in 
- the phytophagic ori bora (5) the tendency to have the thoracic sete ar- 
ranged like the abdomi 
