1.40 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
three remains well developed and the upper becomes rudimentary 
when degeneration sets in, so that this character constantly separates 
the two groups of wart-bearing Bombycides. The present group is 
probably derived from a Notodontian stock, in contrast to the 
Arctian families, derived more or less distinctly from the Noctuidae. 
The relations are expressed in a genealogical tree to follow. 
Melalopha apicalis, Walk. 
This genus is the lowest Eupterotid, in many respects close to the 
Notodontidae. It has a primitive first stage with normal single 
Notodontian setae and no secondary hairs. After the first molt the 
warts and secondary" hairs appear. The abdominal warts have 
not attained the true Eupterotid characters ; wart iv is smaller than 
v and is not in line with it. On the thorax three warts replace 
primitive tubercles i and ii, the upper wart small; but I cannot 
decide exactly which they correspond to. 
D at ana ministra, Drury. 
This larva lacks the primitive first stage and exhibits throughout 
true Eupterotid characters — three warts above the stigmatal wart 
in line transversely, iv and v on abdomen nearly in line longitudi¬ 
nally, the warts degenerate and obscured by secondary setae. 
Apatelodes torrefacta, A. & S. 
In the mature larva the warts are nearly obscured by the second¬ 
ary hairs so that the arrangement cannot well be made out. In 
stage I these hairs are absent, though it is not a primitive first stage. 
The abdominal warts are normal for the Eupterotidae, wart iv very 
large, below the spiracle, v rudimentary, vi large. On the thorax 
there are three warts above the stigmatal wart, but they are not in 
line, one (the middle one) being situated much posterior to the 
others. This is the arrangement of the Lasiocampidae, but the 
structure of the moth prevents the reference of Apatelodes to that 
family. The same structure occurs in the genus Lemonia which 
I separate from the Eupterotidae on account of the absence of the 
frenulum, and it may occur in other Eupterotids, the great mass of 
which are unknown to me in the larval state. 
Family Bombycidae. 
I am indebted to Dr. L. O. Howard for examples of fiombyx 
mori in stage I. The warts are small and degenerate, but true 
warts of the typical Lasiscompid pattern. The only anomalous fea- 
