1894. | NEW YORK ACADEMY OF SCIENCES. 51 
tion of tuberclei. Micropteryx and Hepialus both further differ 
from the Frenatz in lacking the peculiar arrangement of tuber- 
cles on the thoracic segments which is uniform throughout that 
suborder (Fig. 2). 
In the absence of full material, I do not like to insist strongly 
on the the characters of the Jugatz as defined by the arrange- 
ment of the larval tubercles, though the species which I have 
examined indicate that the characters are well marked. 
We have now the Jugatz and Frenatz separated by good 
characters of venation, by the vestiture of the wings* and the 
larval tubercles. It is to be hoped that Dr. Chapman may yet 
find pupal characters which point in the same direction.+ 
Suborder FRENATA. 
During the past season I have collected the newly hatched 
larve of several families of this suborder, to determine the 
relations of the tubercles in the first stage and especially to see 
~what light, if any, was thrown on the classification of the larvee 
by this embryonic condition. In my former paper I excluded 
this stage from consideration on account of its generalized con- 
dition; but it is evident that a consideration of it would throw 
light on the phylogenitic relationships of the more specialized 
families. This was especially desirable in the case of the 
Sphingide. 
I may say at once that my former conclusions are confirmed 
except in the case of the Saturnina. In this group, I find that 
I have misinterpreted the arrangement of the tubercles of the 
mature larva in two instances, one of which is important. 
From the newly hatched larva,it appears that the single process 
or wart below the spiracle is derived from tubercles iv. and v. 
consolidated, instead of from vy. alone, iv. having disappeared 
as I supposed. The structure is, therefore, the same as in the 
Generalized Frenatz, not that of the Specialized Frenate. 
This conclusion is extremely interesting, as it tends to remove 
the only serious contradiction between my classification of the 
larvee and Prof. J. H. Comstock’s one of the moths. It will be 
remembered that I placed the Lacosomide among the General- 
ized Frenatz, while Prof. Comstock placed them among the 
Saturnina. The change which I must make in the position 
which I have assigned to the Saturnina brings them into the 
same line of descent with the Lacosomidz and greatly lessens 
the apparent contradiction, though it does not entirely re- 
move it. / 
*V.L. Kellogg, Kansas Univ. Quarterly, III. 45-89 (1894). 
+See his paper on Pupee, loc. cit., pp. 97-119. 
